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Birkness-Gartman JE, Thomas DL, Engle LL, Voltaggio L, Thompson ED. Immune microenvironment of intimal sarcomas: Adaptive immune resistance with potential therapeutic implications. Am J Clin Pathol 2024; 161:256-263. [PMID: 37921094 DOI: 10.1093/ajcp/aqad142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/25/2023] [Indexed: 11/04/2023] Open
Abstract
OBJECTIVES Intimal sarcomas are rare, aggressive neoplasms that arise from large blood vessels. Characterization of the tumor immune microenvironment may suggest new treatment strategies. METHODS Seventeen specimens from 7 patients were labeled by immunohistochemistry for programmed cell death 1 ligand 1 (PD-L1), CD45, CD8, CD4, FOXP3, CD20, CD68, and LAG3. The immune cell density was scored as a percentage of the tumor area (1+ [<5%], 2+ [5%-50%], 3+ [>50%]); PD-L1 expression was scored on tumor cells and on intratumoral immune cells. Immune marker density was quantified using image analysis software. RESULTS All intimal sarcomas showed immune cell infiltration (41% were 1+, 53% were 2+, 6% were 3+). Tumor and immune cell PD-L1 labeling was seen in 35% and 76% of cases, respectively; PD-L1+ intimal sarcomas had higher CD45+, CD8+, FOXP3+, CD68+, and leukocyte activation gene 3 (LAG3)+ cell densities (P ≤ .01). Similarly, PD-L1 expression on immune cells correlated with higher densities of CD8+ and FOXP3+ cells (P < .04). Higher LAG3+ cell density correlated with higher CD68+ cell density and necrosis (P < .05). One patient with prolonged survival had the highest immune cell density and PD-L1 expression. CONCLUSIONS These data show that intimal sarcomas have an active tumor microenvironment with an adaptive pattern of PD-L1 expression. Our results suggest that immunotherapy may be an effective treatment option.
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Affiliation(s)
| | - Dwayne L Thomas
- Department of Oncology and the Bloomberg-Kimmel Institute for Cancer Immunotherapy, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, US
| | - Logan L Engle
- Department of Oncology and the Bloomberg-Kimmel Institute for Cancer Immunotherapy, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, US
| | - Lysandra Voltaggio
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD, US
| | - Elizabeth D Thompson
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD, US
- Department of Oncology and the Bloomberg-Kimmel Institute for Cancer Immunotherapy, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, US
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2
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Wang J, Gai J, Zhang T, Niu N, Qi H, Thomas DL, Li K, Xia T, Rodriguez C, Parkinson R, Durham J, McPhaul T, Narang AK, Anders RA, Osipov A, Wang H, He J, Laheru DA, Herman JM, Lee V, Jaffee EM, Thompson ED, Zhu Q, Zheng L. Neoadjuvant radioimmunotherapy in pancreatic cancer enhances effector T cell infiltration and shortens their distances to tumor cells. Sci Adv 2024; 10:eadk1827. [PMID: 38324679 PMCID: PMC10849596 DOI: 10.1126/sciadv.adk1827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/08/2024] [Indexed: 02/09/2024]
Abstract
Radiotherapy is hypothesized to have an immune-modulating effect on the tumor microenvironment (TME) of pancreatic ductal adenocarcinoma (PDAC) to sensitize it to anti-PD-1 antibody (a-PD-1) treatment. We collected paired pre- and posttreatment specimens from a clinical trial evaluating combination treatment with GVAX vaccine, a-PD-1, and stereotactic body radiation (SBRT) following chemotherapy for locally advanced PDACs (LAPC). With resected PDACs following different neoadjuvant therapies as comparisons, effector cells in PDACs were found to skew toward a more exhausted status in LAPCs following chemotherapy. The combination of GVAX/a-PD-1/SBRT drives TME to favor antitumor immune response including increased densities of GZMB+CD8+ T cells, TH1, and TH17, which are associated with longer survival, however increases immunosuppressive M2-like tumor-associated macrophages (TAMs). Adding SBRT to GVAX/a-PD-1 shortens the distances from PD-1+CD8+ T cells to tumor cells and to PD-L1+ myeloid cells, which portends prolonged survival. These findings have guided the design of next radioimmunotherapy studies by targeting M2-like TAM in PDACs.
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Affiliation(s)
- Junke Wang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Division of Biliary Tract Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Jessica Gai
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Tengyi Zhang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Nan Niu
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Hanfei Qi
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Dwayne L. Thomas
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Keyu Li
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Tao Xia
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Christina Rodriguez
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Rose Parkinson
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jennifer Durham
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Thomas McPhaul
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Amol K. Narang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Robert A. Anders
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Arsen Osipov
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Cedars Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Hao Wang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jin He
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Daniel A. Laheru
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Joseph M. Herman
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Northwell Health System, New Hyde Park, NY, 11042, USA
| | - Valerie Lee
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Elizabeth M. Jaffee
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Elizabeth D. Thompson
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Qingfeng Zhu
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Lei Zheng
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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3
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Li K, Tandurella JA, Gai J, Zhu Q, Lim SJ, Thomas DL, Xia T, Mo G, Mitchell JT, Montagne J, Lyman M, Danilova LV, Zimmerman JW, Kinny-Köster B, Zhang T, Chen L, Blair AB, Heumann T, Parkinson R, Durham JN, Narang AK, Anders RA, Wolfgang CL, Laheru DA, He J, Osipov A, Thompson ED, Wang H, Fertig EJ, Jaffee EM, Zheng L. Multi-omic analyses of changes in the tumor microenvironment of pancreatic adenocarcinoma following neoadjuvant treatment with anti-PD-1 therapy. Cancer Cell 2022; 40:1374-1391.e7. [PMID: 36306792 PMCID: PMC9669212 DOI: 10.1016/j.ccell.2022.10.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 08/08/2022] [Accepted: 10/04/2022] [Indexed: 01/21/2023]
Abstract
Successful pancreatic ductal adenocarcinoma (PDAC) immunotherapy necessitates optimization and maintenance of activated effector T cells (Teff). We prospectively collected and applied multi-omic analyses to paired pre- and post-treatment PDAC specimens collected in a platform neoadjuvant study of granulocyte-macrophage colony-stimulating factor-secreting allogeneic PDAC vaccine (GVAX) vaccine ± nivolumab (anti-programmed cell death protein 1 [PD-1]) to uncover sensitivity and resistance mechanisms. We show that GVAX-induced tertiary lymphoid aggregates become immune-regulatory sites in response to GVAX + nivolumab. Higher densities of tumor-associated neutrophils (TANs) following GVAX + nivolumab portend poorer overall survival (OS). Increased T cells expressing CD137 associated with cytotoxic Teff signatures and correlated with increased OS. Bulk and single-cell RNA sequencing found that nivolumab alters CD4+ T cell chemotaxis signaling in association with CD11b+ neutrophil degranulation, and CD8+ T cell expression of CD137 was required for optimal T cell activation. These findings provide insights into PD-1-regulated immune pathways in PDAC that should inform more effective therapeutic combinations that include TAN regulators and T cell activators.
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Affiliation(s)
- Keyu Li
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Pancreatic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Joseph A Tandurella
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jessica Gai
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Qingfeng Zhu
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Su Jin Lim
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Dwayne L Thomas
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Tao Xia
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Guanglan Mo
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jacob T Mitchell
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Janelle Montagne
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Melissa Lyman
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Ludmila V Danilova
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jacquelyn W Zimmerman
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Benedict Kinny-Köster
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Tengyi Zhang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Linda Chen
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Alex B Blair
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Thatcher Heumann
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Rose Parkinson
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jennifer N Durham
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Amol K Narang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Robert A Anders
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Christopher L Wolfgang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Daniel A Laheru
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jin He
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Arsen Osipov
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Elizabeth D Thompson
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Hao Wang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Elana J Fertig
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Quantitative Sciences Division, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Applied Mathematics and Statistics, Johns Hopkins University Whiting School of Engineering, Baltimore, MD 21218, USA; Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA.
| | - Elizabeth M Jaffee
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
| | - Lei Zheng
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Skip Viragh Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; The Cancer Convergence Institute at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
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4
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Xia T, Li K, Niu N, Shao Y, Ding D, Thomas DL, Jing H, Fujiwara K, Hu H, Osipov A, Yuan C, Wolfgang CL, Thompson ED, Anders RA, He J, Mou Y, Murphy AG, Zheng L. Immune cell atlas of cholangiocarcinomas reveals distinct tumor microenvironments and associated prognoses. J Hematol Oncol 2022; 15:37. [PMID: 35346322 PMCID: PMC8962046 DOI: 10.1186/s13045-022-01253-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/10/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Immunotherapy has demonstrated a limited clinical efficacy in approximately 5% of cholangiocarcinoma. The main challenges for an effective immunotherapy response in cholangiocarcinoma arise from the tumor microenvironment, which is poorly understood. METHODS For a comprehensive analysis of the tumor microenvironment in cholangiocarcinoma, we performed multiplex immunohistochemistry with two 15-marker immune panels and Nanostring assays for a comprehensive analysis of 104 surgically resected cholangiocarcinomas including intrahepatic, hilar, and distal cholangiocarcinoma. We also validated some key findings with a batch integration analysis of published single cell RNA sequencing data. RESULTS This study found that natural killer cells occupy the largest immune cell compartment in cholangiocarcinoma. Granzyme-B+CD8+ effector T cells are significantly associated with better overall survival in both intrahepatic and distal cholangiocarcinoma. Above 85% of intrahepatic cholangiocarcinomas with higher density of PD-1-EOMES-CD8+ effector T cells are associated with long-term survival. However, only the density of PD-1-EOMES-CD8+ T cells in the tumor areas, but not in the peripheries of the tumors, is prognostic. In all three cholangiocarcinoma subtypes, T regulator cells are significantly associated with a poor prognosis; however, M1 and M2 tumor-associated macrophages or PD-L1+ tumor-associated macrophage demonstrate different prognostic values. Combining PD-L1+ M1 or M2, PD-L1- M1 or M2 tumor-associated macrophages, and T regulator cells to subgroup intrahepatic and distal cholangiocarcinoma, the prognosis is significantly better distinguished. Moreover, PD-L1- M2 tumor-associated macrophages is associated with a good prognosis in intrahepatic and distal cholangiocarcinoma, suggesting this subtype of M2 tumor-associated macrophages may be antitumoral. Interestingly, lower densities of various types of immunosuppressive cells are associated with decreased infiltration of effector T cells in distal and hilar cholangiocarcinoma, but not in intrahepatic cholangiocarcinoma. In intrahepatic cholangiocarcinoma, PD-L1+ tumor-associated macrophages exert their immunosuppressive function likely through promoting T cell exhaustion. CONCLUSIONS This study suggests that the densities of Granzyme-B+CD8+ effector T cells and non-exhausted PD-1-EOMES-CD8+ T cells and the PD-L1 status in the tumor-associated macrophages are prognostic makers in cholangiocarcinomas. The study also supports targeting PD-L1+ tumor-associated macrophages as the immunotherapy for cholangiocarcinoma.
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Affiliation(s)
- Tao Xia
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Gastrointestinal and Pancreatic Surgery, Department of General Surgery, and Cancer Center, The Zhejiang Provincial People's Hospital and the Affiliated People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Keyu Li
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pancreatic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Nan Niu
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Gastrointestinal and Pancreatic Surgery, Department of General Surgery, and Cancer Center, The Zhejiang Provincial People's Hospital and the Affiliated People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Yingkuan Shao
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Zhejiang University Second Affiliated Hospital, Hangzhou, China
| | - Ding Ding
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dwayne L Thomas
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Hao Jing
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kenji Fujiwara
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Haijie Hu
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Arsen Osipov
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chunhui Yuan
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christopher L Wolfgang
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Elizabeth D Thompson
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Robert A Anders
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jin He
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Yiping Mou
- Department of Gastrointestinal and Pancreatic Surgery, Department of General Surgery, and Cancer Center, The Zhejiang Provincial People's Hospital and the Affiliated People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Adrian G Murphy
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Lei Zheng
- Department of Oncology, Johns Hopkins University School of Medicine, 1650 Orleans Street, CRB1 Room 351, Baltimore, MD, 21231, USA.
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
- The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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5
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Ho WJ, Erbe R, Danilova L, Phyo Z, Bigelow E, Stein-O'Brien G, Thomas DL, Charmsaz S, Gross N, Woolman S, Cruz K, Munday RM, Zaidi N, Armstrong TD, Sztein MB, Yarchoan M, Thompson ED, Jaffee EM, Fertig EJ. Multi-omic profiling of lung and liver tumor microenvironments of metastatic pancreatic cancer reveals site-specific immune regulatory pathways. Genome Biol 2021; 22:154. [PMID: 33985562 PMCID: PMC8118107 DOI: 10.1186/s13059-021-02363-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 04/23/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The majority of pancreatic ductal adenocarcinomas (PDAC) are diagnosed at the metastatic stage, and standard therapies have limited activity with a dismal 5-year survival rate of only 8%. The liver and lung are the most common sites of PDAC metastasis, and each have been differentially associated with prognoses and responses to systemic therapies. A deeper understanding of the molecular and cellular landscape within the tumor microenvironment (TME) metastasis at these different sites is critical to informing future therapeutic strategies against metastatic PDAC. RESULTS By leveraging combined mass cytometry, immunohistochemistry, and RNA sequencing, we identify key regulatory pathways that distinguish the liver and lung TMEs in a preclinical mouse model of metastatic PDAC. We demonstrate that the lung TME generally exhibits higher levels of immune infiltration, immune activation, and pro-immune signaling pathways, whereas multiple immune-suppressive pathways are emphasized in the liver TME. We then perform further validation of these preclinical findings in paired human lung and liver metastatic samples using immunohistochemistry from PDAC rapid autopsy specimens. Finally, in silico validation with transfer learning between our mouse model and TCGA datasets further demonstrates that many of the site-associated features are detectable even in the context of different primary tumors. CONCLUSIONS Determining the distinctive immune-suppressive features in multiple liver and lung TME datasets provides further insight into the tissue specificity of molecular and cellular pathways, suggesting a potential mechanism underlying the discordant clinical responses that are often observed in metastatic diseases.
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Affiliation(s)
- Won Jin Ho
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
- The Johns Hopkins Cancer Convergence Institute, Baltimore, USA
- Skip Viragh Center for Pancreatic Cancer, Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 4M07 Bunting Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD, 21287, USA
| | - Rossin Erbe
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, USA
| | - Ludmila Danilova
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Zaw Phyo
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Emma Bigelow
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | | | - Dwayne L Thomas
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, USA
| | - Soren Charmsaz
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Nicole Gross
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Skylar Woolman
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Kayla Cruz
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Rebecca M Munday
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, USA
| | - Neeha Zaidi
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
- Skip Viragh Center for Pancreatic Cancer, Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 4M07 Bunting Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD, 21287, USA
| | - Todd D Armstrong
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Marcelo B Sztein
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Mark Yarchoan
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
| | - Elizabeth D Thompson
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA
- Skip Viragh Center for Pancreatic Cancer, Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 4M07 Bunting Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD, 21287, USA
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, USA
| | - Elizabeth M Jaffee
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA.
- The Johns Hopkins Cancer Convergence Institute, Baltimore, USA.
- Skip Viragh Center for Pancreatic Cancer, Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 4M07 Bunting Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD, 21287, USA.
| | - Elana J Fertig
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, 550 N Broadway Suite 1101E, Baltimore, MD, 21209, USA.
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, USA.
- Department of Applied Mathematics and Statistics, Johns Hopkins University Whiting School of Engineering, Baltimore, MD, USA.
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, USA.
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6
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Bever KM, Thomas DL, Zhang J, Diaz Rivera EA, Rosner GL, Zhu Q, Nauroth JM, Christmas B, Thompson ED, Anders RA, Judkins C, Liu M, Jaffee EM, Ahuja N, Zheng L, Azad NS. A feasibility study of combined epigenetic and vaccine therapy in advanced colorectal cancer with pharmacodynamic endpoint. Clin Epigenetics 2021; 13:25. [PMID: 33531075 PMCID: PMC7856736 DOI: 10.1186/s13148-021-01014-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/13/2021] [Indexed: 12/19/2022] Open
Abstract
Epigenetic therapies may modulate the tumor microenvironment. We evaluated the safety and optimal sequence of combination DNA methyltransferase inhibitor guadecitabine with a granulocyte macrophage-colony-stimulating-factor (GM-CSF) secreting colon cancer (CRC) vaccine (GVAX) using a primary endpoint of change in CD45RO + T cells. 18 patients with advanced CRC enrolled, 11 underwent paired biopsies and were evaluable for the primary endpoint. No significant increase in CD45RO + cells was noted. Grade 3-4 toxicities were expected and manageable. Guadecitabine + GVAX was tolerable but demonstrated no significant immunologic activity in CRC. We report a novel trial design to efficiently evaluate investigational therapies with a primary pharmacodynamic endpoint.Trial registry Clinicaltrials.gov: NCT01966289. Registered 21 October, 2013.
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Affiliation(s)
- Katherine M Bever
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Dwayne L Thomas
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jiajia Zhang
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Ernie A Diaz Rivera
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Gary L Rosner
- Division of Biostatistics and Bioinformatics, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Qingfeng Zhu
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Julie M Nauroth
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Brian Christmas
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Elizabeth D Thompson
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Robert A Anders
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Carol Judkins
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Meizheng Liu
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Elizabeth M Jaffee
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA
| | - Nita Ahuja
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Departments of Surgery, Oncology, and Pathology, Smilow Comprehensive Cancer Center, Yale University School of Medicine, New Haven, CT, USA
| | - Lei Zheng
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Nilofer S Azad
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Bloomberg~Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, 1650 Orleans Street, Office 4M10, Baltimore, MD, 21287, USA.
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7
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Zheng L, Ding D, Edil BH, Judkins C, Durham JN, Thomas DL, Bever KM, Mo G, Solt SE, Hoare JA, Bhattacharya R, Zhu Q, Osipov A, Onner B, Purtell KA, Cai H, Parkinson R, Hacker-Prietz A, Herman JM, Le DT, Azad NS, De Jesus-Acosta AMC, Blair AB, Kim V, Soares KC, Manos L, Cameron JL, Makary MA, Weiss MJ, Schulick RD, He J, Wolfgang CL, Thompson ED, Anders RA, Sugar E, Jaffee EM, Laheru DA. Vaccine-Induced Intratumoral Lymphoid Aggregates Correlate with Survival Following Treatment with a Neoadjuvant and Adjuvant Vaccine in Patients with Resectable Pancreatic Adenocarcinoma. Clin Cancer Res 2020; 27:1278-1286. [PMID: 33277370 DOI: 10.1158/1078-0432.ccr-20-2974] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/05/2020] [Accepted: 12/01/2020] [Indexed: 12/27/2022]
Abstract
PURPOSE Immunotherapy is currently ineffective for nearly all pancreatic ductal adenocarcinomas (PDAC), largely due to its tumor microenvironment (TME) that lacks antigen-experienced T effector cells (Teff). Vaccine-based immunotherapies are known to activate antigen-specific Teffs in the peripheral blood. To evaluate the effect of vaccine therapy on the PDAC TME, we designed a neoadjuvant and adjuvant clinical trial of an irradiated, GM-CSF-secreting, allogeneic PDAC vaccine (GVAX). PATIENTS AND METHODS Eighty-seven eligible patients with resectable PDAC were randomly assigned (1:1:1) to receive GVAX alone or in combination with two forms of low-dose cyclophosphamide. Resected tumors following neoadjuvant immunotherapy were assessed for the formation of tertiary lymphoid aggregates (TLA) in response to treatment. The clinical endpoints are disease-free survival (DFS) and overall survival (OS). RESULTS The neoadjuvant treatment with GVAX either alone or with two forms of low-dose cyclophosphamide is safe and feasible without adversely increasing the surgical complication rate. Patients in Arm A who received neoadjuvant and adjuvant GVAX alone had a trend toward longer median OS (35.0 months) than that (24.8 months) in the historical controls who received adjuvant GVAX alone. However, Arm C, who received low-dose oral cyclophosphamide in addition to GVAX, had a significantly shorter DFS than Arm A. When comparing patients with OS > 24 months to those with OS < 15 months, longer OS was found to be associated with higher density of intratumoral TLA. CONCLUSIONS It is safe and feasible to use a neoadjuvant immunotherapy approach for PDACs to evaluate early biologic responses. In-depth analysis of TLAs is warranted in future neoadjuvant immunotherapy clinical trials.
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Affiliation(s)
- Lei Zheng
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland. .,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ding Ding
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Barish H Edil
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carol Judkins
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jennifer N Durham
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Dwayne L Thomas
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Katherine M Bever
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Guanglan Mo
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sara E Solt
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Jessica A Hoare
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Raka Bhattacharya
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Qingfeng Zhu
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Arsen Osipov
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Beth Onner
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Katrina A Purtell
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hongyan Cai
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Rose Parkinson
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Amy Hacker-Prietz
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Joseph M Herman
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Dung T Le
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Nilofer S Azad
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ana M C De Jesus-Acosta
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Alex B Blair
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Victoria Kim
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kevin C Soares
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lindsey Manos
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - John L Cameron
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Martin A Makary
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Matthew J Weiss
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard D Schulick
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery and Cancer Center, University of Colorado School of Medicine, Aurora, Colorado
| | - Jin He
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Christopher L Wolfgang
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Elizabeth D Thompson
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Robert A Anders
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Elizabeth Sugar
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,School of Public Health, Department of Biostatistics, Johns Hopkins University, Baltimore, Maryland
| | - Elizabeth M Jaffee
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Daniel A Laheru
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, Maryland.,The Sol Goldman Pancreatic Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
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8
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Muth ST, Saung MT, Blair AB, Henderson MG, Thomas DL, Zheng L. CD137 agonist-based combination immunotherapy enhances activated, effector memory T cells and prolongs survival in pancreatic adenocarcinoma. Cancer Lett 2020; 499:99-108. [PMID: 33271264 DOI: 10.1016/j.canlet.2020.11.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/05/2020] [Accepted: 11/26/2020] [Indexed: 01/05/2023]
Abstract
Pancreatic ductal adenocarcinoma(PDAC) is resistant to the PD-1/PD-L1 blockade therapy. Previously, the combination of PD-1 blockade and vaccine therapy was shown to have a modest antitumor activity in murine models of PDAC. We used a murine syngeneic model of metastatic PDAC to identify, among multiple T cell modulators tested, which therapeutic agents in combination with the GVAX cancer vaccine and an anti-PD-1 antagonist antibody(αPD-1) are able to improve the survival. We found that an anti-CD137 agonist antibody(αCD137) most significantly improved survival in the mouse PDAC model. Moreover, αPD-1 and αCD137 together in combination with vaccine therapy more significantly increased the expression of costimulatory molecules CD137 and OX40 on CD4+PD-1+ and CD8+PD-1+ T cells comparing to αPD-1 or αCD137, respectively, suggesting that T cell activation within PDACs were enhanced by a synergy of αCD137 and αPD-1. On another hand, αCD137 treatment led to an increase in effector memory T cells independent of αPD-1. Although αCD137 does not increase the cytotoxic effector T cell function, the addition of αCD137 to GVAX+αPD-1 increased expression of IFNγ in EOMES + exhausted tumor-infiltrating T cells. Taken together, this preclinical study established the mechanism of targeting CD137 to enhance effector memory and activated T cells in PDAC. Immunohistochemistry analysis of resected human PDACs following the neo-adjuvant GVAX treatment showed increased levels of CD8+ T cells in those with high levels of CD137 expression, supporting an ongoing clinical trial of testing CD137 as a potential target in treating PDACs that are inflamed with T cells by vaccine therapy.
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Affiliation(s)
- Stephen T Muth
- The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - May Tun Saung
- The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Alex B Blair
- The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - MacKenzie G Henderson
- The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Dwayne L Thomas
- The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Lei Zheng
- The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, United States; The Pancreatic Cancer Precision Medicine Center of Excellence Program, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States.
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9
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Li H, Wu XL, Tait RG, Bauck S, Thomas DL, Murphy TW, Rosa GJM. Genome-wide association study of milk production traits in a crossbred dairy sheep population using three statistical models. Anim Genet 2020; 51:624-628. [PMID: 32510640 DOI: 10.1111/age.12956] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/17/2020] [Accepted: 05/01/2020] [Indexed: 01/08/2023]
Abstract
Milk production is one of the most important characteristics of dairy sheep, and the identification of genes affecting milk production traits is critical to understanding the genetics and improve milk production in future generations. Three statistical techniques, namely GWAS, ridge-regression BLUP and BayesC π , were used to identify SNPs in significant association with three milk production traits (milk yield, fat yield and protein yield) in a crossbred dairy sheep population. The results suggested that chromosomes 1, 3, 4, 5, 7 and 11 were likely to harbor genes important to milk production because these chromosomes had the greatest top-100-SNP variance contributions on the three milk production traits. The GWAS analysis identified between 74 and 288 genome-wide significant SNP (P < 0.05) whereas the BayesCπ model revealed between six and 63 SNPs, each with >95% posterior probability of inclusion as having a non-zero association effect on at least one of the three milk production traits. Positional candidate genes for milk production in sheep were searched, based on the sheep genomic assembly OAR version 3.1, such as those which map position coincided with or was located within 0.1 Mbp of a genome-wide suggestive or significant SNP. These identified SNPs and candidate genes supported some previous findings and also added new information about genetic markers for genetic improvement of lactation in dairy sheep, but keeping in mind that the majority of these positional candidate genes are not necessarily true causative loci for these traits and future validations are thus necessary.
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Affiliation(s)
- H Li
- Department of Animal Sciences, University of Wisconsin, Madison, WI, 53706, USA.,Biostatistics and Bioinformatics, Neogen GeneSeek, Lincoln, NE, 68504, USA
| | - X-L Wu
- Department of Animal Sciences, University of Wisconsin, Madison, WI, 53706, USA.,Biostatistics and Bioinformatics, Neogen GeneSeek, Lincoln, NE, 68504, USA
| | - R G Tait
- Biostatistics and Bioinformatics, Neogen GeneSeek, Lincoln, NE, 68504, USA
| | - S Bauck
- Biostatistics and Bioinformatics, Neogen GeneSeek, Lincoln, NE, 68504, USA
| | - D L Thomas
- Department of Animal Sciences, University of Wisconsin, Madison, WI, 53706, USA
| | - T W Murphy
- Department of Animal Sciences, University of Wisconsin, Madison, WI, 53706, USA
| | - G J M Rosa
- Department of Animal Sciences, University of Wisconsin, Madison, WI, 53706, USA.,Department of Biostatistics and Medical Informatics, University of Wisconsin, Madison, WI, 53706, USA
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10
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Yarchoan M, Huang CY, Zhu Q, Ferguson AK, Durham JN, Anders RA, Thompson ED, Rozich NS, Thomas DL, Nauroth JM, Rodriguez C, Osipov A, De Jesus-Acosta A, Le DT, Murphy AG, Laheru D, Donehower RC, Jaffee EM, Zheng L, Azad NS. A phase 2 study of GVAX colon vaccine with cyclophosphamide and pembrolizumab in patients with mismatch repair proficient advanced colorectal cancer. Cancer Med 2019; 9:1485-1494. [PMID: 31876399 PMCID: PMC7013064 DOI: 10.1002/cam4.2763] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 11/17/2019] [Accepted: 11/19/2019] [Indexed: 01/21/2023] Open
Abstract
Background Mismatch repair proficient (MMRp) colorectal cancer (CRC) has been refractory to single‐agent programmed cell death protein 1 (PD1) inhibitor therapy. Colon GVAX is an allogeneic, whole‐cell, granulocyte‐macrophage colony‐stimulating factor ‐secreting cellular immunotherapy that induces T‐cell immunity against tumor‐associated antigens and has previously been studied in combination with low‐dose cyclophosphamide (Cy) to inhibit regulatory T cells. Methods We conducted a single‐arm study of GVAX/Cy in combination with the PD1 inhibitor pembrolizumab in patients with advanced MMRp CRC. Patients received pembrolizumab plus Cy on day 1, GVAX on day 2, of a 21‐day cycle. The primary endpoint was the objective response rate by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. Secondary objectives included safety, overall survival, progression‐free survival, changes in carcinoembryonic antigen (CEA) levels, and immune‐related correlates. Results Seventeen patients were enrolled. There were no objective responses, and the disease control rate was 18% by RECIST 1.1. The median progression‐free survival was 82 days (95% confidence interval [CI], 48‐97 days) and the median overall survival was 213 days (95% CI 179‐441 days). Biochemical responses (≥30% decline in CEA) were observed in 7/17 (41%) of patients. Grade ≥ 3 treatment‐related adverse events were observed in two patients (hemolytic anemia and corneal transplant rejection). Paired pre‐ and on‐treatment biopsy specimens showed increases in programmed death‐ligand 1 expression and tumor necrosis in a subset of patients. Conclusions GVAX/Cy plus pembrolizumab failed to meet its primary objective in MMRp CRC. Biochemical responses were observed in a subset of patients and have not previously been observed with pembrolizumab monotherapy in MMRp CRC, indicating that GVAX may modulate the antitumor immune response.
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Affiliation(s)
- Mark Yarchoan
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chiung-Yu Huang
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Qingfeng Zhu
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Anna K Ferguson
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jennifer N Durham
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Robert A Anders
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Elizabeth D Thompson
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Noah S Rozich
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dwayne L Thomas
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Julie M Nauroth
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christina Rodriguez
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Arsen Osipov
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ana De Jesus-Acosta
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dung T Le
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Adrian G Murphy
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Daniel Laheru
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ross C Donehower
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Elizabeth M Jaffee
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Lei Zheng
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Nilofer S Azad
- Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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11
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Thomas DL, Murphy AG, Weiss MJ, He J, Makary MA, Burkhart RA, Wolfgang CL, Jaffee EM, Zheng L, Thompson ED. Abstract 3102A: Analysis of spatial relationships between infiltrating immune cells within the tumor microenvironment following combinatorial immunotherapy. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-3102a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Pancreatic ductal adenocarcinoma (PDAC) is an aggressive malignancy, which is the third leading cause of cancer related deaths in the United Sates. As the number of new cases continues to rise, the current treatments of surgical resection, chemotherapy, and radiation have not drastically improved PDAC survival rates. PDAC is known to have a quiescent immune microenvironment, which is resistant to single-agent checkpoint inhibitors. We identified a combination approach using immune checkpoint inhibition and immune activing agonists to prime the tumor microenvironment (TME) to activate T-cells in order to overcome this “cold” environment. Here we investigate spatial relationships between CD8+, PD-1+ (programmed cell death protein), and PD-L1+ (programmed cell death ligand) cells in the TME following single agent and combinatorial immunotherapy protocols.
Experimental Procedures: Our cohort includes 17 surgically resected patient tumor specimens from formalin-fixed paraffin-embedded tissue blocks. These patients either received GM-CSF vaccine (GVAX) with or without immune checkpoint inhibitor, anti-PD-1. Of the 11 patients analyzed, six received GAVX with anti-PD-1 while the others received GVAX alone. Automated immunohistochemical staining was performed for CD8, PD-1, and PD-L1. Analysis was performed using HALO image analysis software (Indica Labs) (HALO v2.0.1145.31). Proximal distance (Nearest Neighbor Analysis) of CD8+ to PD-1+ cells, CD8+ to PD-L1+ cells, PD-1+ to PD-L1+ cells within the tumor area was measured for each patient to generate average distance between cell types.
Results: Of the 17 PDAC patients in our cohort, 11 patient specimens were analyzed. Nearest Neighbor Analysis between the two groups shows there is a trend of increased distance between CD8+ cells and PD-1+ cells and between CD8+ cells and PD-L1+ cells in patients receiving GVAX and anti-PD-1 compared to GVAX alone (p=0.032 and n.s., respectively). Proximal distance analysis of PD-1+ cells to PD-L1+ cells is ongoing.
Conclusions: PDAC remains a considerable diagnostic and therapeutic challenge due to its poor survival outcomes. However, immunotherapy may provide an alternative strategy to improve survival for PDAC patients. Our results suggest that monotherapy with GVAX versus combination therapy with GVAX plus anti-PD-L1 leads to differences in the spatial relationship between CD8+ cells and PD-1+ and PD-L1+ cells, specifically, greater distance between CD8+ T cells and PD-L1+ and PD-1+ cells, suggesting the potential for greater functionality and less direct cell/cell suppression. More broadly, our results demonstrate the ability to detect differences in patient groups based on spatial analysis of distance between cell types, a technique that can be applied generally to the correlative analyses of immunotherapy protocols.. Further analysis of spatial relationships and immune cell infiltration in the TME following immunotherapy will help elucidate how these treatment protocols impact the architecture of the TME and will help guide therapeutic approaches to immunotherapy in pancreatic cancer. We demonstrate a technique of spatial analysis that will aid in dissecting these cellular relationships.
Citation Format: Dwayne L. Thomas II, Adrian G. Murphy, Matthew J. Weiss, Jin He, Martin A. Makary, Richard A. Burkhart, Christopher L. Wolfgang, Elizabeth M. Jaffee, Lei Zheng, Elizabeth D. Thompson. Analysis of spatial relationships between infiltrating immune cells within the tumor microenvironment following combinatorial immunotherapy [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 3102A.
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Affiliation(s)
| | | | | | - Jin He
- Johns Hopkins University School of Medicine, Baltimore, MD
| | | | | | | | | | - Lei Zheng
- Johns Hopkins University School of Medicine, Baltimore, MD
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Blair AB, Kleponis J, Thomas DL, Muth ST, Murphy AG, Kim V, Zheng L. IDO1 inhibition potentiates vaccine-induced immunity against pancreatic adenocarcinoma. J Clin Invest 2019; 129:1742-1755. [PMID: 30747725 PMCID: PMC6436883 DOI: 10.1172/jci124077] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 02/05/2019] [Indexed: 12/26/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) represents an immune quiescent tumor that is resistant to immune checkpoint inhibitors. Previously, our group has shown that a GM-CSF-secreting allogenic pancreatic tumor cell vaccine (GVAX) may prime the tumor microenvironment by inducing intratumoral T cell infiltration. Here, we show that untreated PDACs express minimal indoleamine-2,3-dioxygenase (IDO1); however, GVAX therapy induced IDO1 expression on tumor epithelia as well as vaccine-induced tertiary lymphoid aggregates. IDO1 expression plays a role in regulating the polarization of Th1, Th17, and possibly T regulatory cells in PDAC tumors. IDO1 inhibitor enhanced antitumor efficacy of GVAX in a murine model of PDACs. The combination of vaccine and IDO1 inhibitor enhanced intratumoral T cell infiltration and function, but adding anti-PD-L1 antibody to the combination did not offer further synergy and in fact may have had a negative interaction, decreasing the number of intratumoral effector T cells. Additionally, IDO1 inhibitor in the presence of vaccine therapy did not significantly modulate intratumoral myeloid-derived suppressor cells quantitatively, but diminished their suppressive effect on CD8+ proliferation. Our study supports the combination of IDO1 inhibitor and vaccine therapy; however, it does not support the combination of IDO1 inhibitor and anti-PD-1/PD-L1 antibody for T cell-inflamed tumors such as PDACs treated with vaccine therapy.
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MESH Headings
- Adenocarcinoma/immunology
- Adenocarcinoma/pathology
- Adenocarcinoma/therapy
- Animals
- Cancer Vaccines/immunology
- Cancer Vaccines/pharmacology
- Carcinoma, Pancreatic Ductal/immunology
- Carcinoma, Pancreatic Ductal/pathology
- Carcinoma, Pancreatic Ductal/therapy
- Cell Line, Tumor
- Enzyme Inhibitors/pharmacology
- Humans
- Indoleamine-Pyrrole 2,3,-Dioxygenase/antagonists & inhibitors
- Indoleamine-Pyrrole 2,3,-Dioxygenase/immunology
- Mice
- Neoplasms, Experimental/immunology
- Neoplasms, Experimental/pathology
- Neoplasms, Experimental/therapy
- Pancreatic Neoplasms/immunology
- Pancreatic Neoplasms/pathology
- Pancreatic Neoplasms/therapy
- T-Lymphocytes, Helper-Inducer/immunology
- T-Lymphocytes, Helper-Inducer/pathology
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Affiliation(s)
- Alex B. Blair
- The Sidney Kimmel Comprehensive Cancer Center
- Department of Oncology
- Department of Surgery, and
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - Dwayne L. Thomas
- The Sidney Kimmel Comprehensive Cancer Center
- Department of Oncology
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Stephen T. Muth
- The Sidney Kimmel Comprehensive Cancer Center
- Department of Oncology
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Adrian G. Murphy
- The Sidney Kimmel Comprehensive Cancer Center
- Department of Oncology
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Victoria Kim
- The Sidney Kimmel Comprehensive Cancer Center
- Department of Oncology
- Department of Surgery, and
| | - Lei Zheng
- The Sidney Kimmel Comprehensive Cancer Center
- Department of Oncology
- Department of Surgery, and
- The Pancreatic Cancer Precision Medicine Center of Excellence Program, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Saung MT, Muth S, Ding D, Thomas DL, Blair AB, Tsujikawa T, Coussens L, Jaffee EM, Zheng L. Targeting myeloid-inflamed tumor with anti-CSF-1R antibody expands CD137+ effector T-cells in the murine model of pancreatic cancer. J Immunother Cancer 2018; 6:118. [PMID: 30424804 PMCID: PMC6234697 DOI: 10.1186/s40425-018-0435-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 10/26/2018] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The pancreatic cancer vaccine, GVAX, induces novel lymphoid aggregates in the otherwise immune quiescent pancreatic ductal adenocarcinoma (PDAC). GVAX also upregulates the PD-1/PD-L1 pathway, and a pre-clinical model demonstrated the anti-tumor effects of combination GVAX and anti-PD-1 antibody therapy (GVAX/αPD-1). Resistance to GVAX was associated with an immune-suppressive myeloid cell infiltration, which may limit further therapeutic gains of GVAX/αPD-1 therapy. The expression of CSF-1R, a receptor important for myeloid cell migration, differentiation and survival, and the effect of its therapeutic blockade in the context of GVAX in PDAC has not been investigated. METHODS Lymphoid aggregates appreciated in 24 surgically resected PDAC from patients who received one dose of neoadjuvant GVAX were analyzed with multiplex immunohistochemistry. Flow cytometry analysis of tumor infiltrating T-cells in a murine model of PDAC was performed to investigate the therapeutic effects and mechanism of anti-CSF-1R/anti-PD-1/GVAX combination immunotherapy. RESULTS High CSF-1R expression in resected PDAC from patients who received neoadjuvant GVAX was associated with a higher myeloid to lymphoid cell ratio (p < 0.05), which has been associated with poorer survival. This higher CSF-1R expression was associated with a higher intra-tumoral infiltration of immature dendritic cells (p < 0.05), but not mature dendritic cells (p = 0.132). In the pre-clinical murine model, administering anti-CSF-1R antibody prior to and after GVAX/αPD-1 ("pre/post-αCSF-1R + αPD-1 + GVAX") enhanced the survival rate compared to GVAX/αPD-1 dual therapy (p = 0.005), but administering anti-CSF-1R only before GVAX/αPD-1 did not (p = 0.41). The "pre/post-αCSF-1R + αPD-1 + GVAX" group also had higher intra-tumoral infiltration of PD-1 + CD8+ and PD-1 + CD4+ T-cells compared to αPD-1/GVAX (p < 0.001). Furthermore, this regimen increased the intra-tumoral infiltration of PD-1 + CD137 + CD8+, PD-1 + CD137 + CD4+ and PD-1 + OX40 + CD4+ T-cells (p < 0.001). These PD-1 + CD137 + CD8+ T-cells expressed high levels of interferon-γ (median 80-90%) in response to stimulation with CD3/CD28 activation beads, and this expression was higher than that of PD-1 + CD137-CD8+ T-cells (p < 0.001). CONCLUSIONS The conversion of exhausted PD-1+ T-cells to CD137+ activated effector T-cells may contribute to the anti-tumor effects of the anti-CSF-1R/anti-PD-1/GVAX combination therapy. Anti-CSF-1R antibody with anti-PD-1 antibody and GVAX have the potential be an effective therapeutic strategy for treatment of PDAC.
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Affiliation(s)
- May Tun Saung
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Stephen Muth
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ding Ding
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dwayne L Thomas
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alex B Blair
- The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Takahiro Tsujikawa
- Department of Otolaryngology-Head and Neck Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Cell, Developmental & Cancer Biology, Oregon Health and Science University, Portland, OR, USA
| | - Lisa Coussens
- Department of Cell, Developmental & Cancer Biology, Oregon Health and Science University, Portland, OR, USA.,Knight Cancer Institute, Oregon Health and Science University, Portland, OR, USA
| | - Elizabeth M Jaffee
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Lei Zheng
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,The Sidney Kimmel Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,The Skip Viragh Center for Pancreatic Cancer Research and Clinical Care, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,Pancreatic Cancer Precision Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,The Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Pulina G, Milán MJ, Lavín MP, Theodoridis A, Morin E, Capote J, Thomas DL, Francesconi AHD, Caja G. Invited review: Current production trends, farm structures, and economics of the dairy sheep and goat sectors. J Dairy Sci 2018; 101:6715-6729. [PMID: 29859690 DOI: 10.3168/jds.2017-14015] [Citation(s) in RCA: 173] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 04/19/2018] [Indexed: 11/19/2022]
Abstract
Dairy small ruminants account for approximately 21% of all sheep and goats in the world, produce around 3.5% of the world's milk, and are mainly located in subtropical-temperate areas of Asia, Europe, and Africa. Dairy sheep are concentrated around the Mediterranean and Black Sea regions, where their dairy products are typical ingredients of the human diet. Dairy goats are concentrated in low-income, food-deficit countries of the Indian subcontinent, where their products are a key food source, but are also present in high-income, technologically developed countries. This review evaluates the status of the dairy sheep and goat sectors in the world, with special focus on the commercially and technically developed industries in France, Greece, Italy, and Spain (FGIS). Dairy small ruminants account for a minor part of the total agricultural output in France, Italy, and Spain (0.9 to 1.8%) and a larger part in Greece (8.8%). In FGIS, the dairy sheep industry is based on local breeds and crossbreeds raised under semi-intensive and intensive systems and is concentrated in a few regions in these countries. Average flock size varies from small to medium (140 to 333 ewes/farm), and milk yield from low to medium (85 to 216 L/ewe), showing substantial room for improvement. Most sheep milk is sold to industries and processed into traditional cheese types, many of which are Protected Denomination of Origin (PDO) cheeses for gourmet and export markets (e.g., Pecorino, Manchego, and Roquefort). By comparing break-even milk price among FGIS countries, we observed the following: (1) most Greek and French dairy sheep farms were unprofitable, with the exception of the intensive Chios farms of Greece; (2) milk price was aligned with cost of production in Italy; and (3) profitable farms coexisted with unprofitable farms in Spain. In FGIS, dairy goat production is based on local breeds raised under more extensive systems than sheep. Compared with sheep, average dairy goat herds are smaller (36 to 190 does/farm) but milk yield is greater (153 to 589 L/doe), showing room for improvement. Goat milk is mainly processed on-farm into dairy products for national markets, but some PDO goat milk cheeses (e.g., Murcia al Vino) are exported. Processed goat milk is sold for local human consumption or dehydrated for export. Mixed sheep-goat (e.g., Feta) and cow-sheep-goat milk cheeses are common in many countries. Strategies to improve the dairy sheep and goat sectors in these 4 countries are proposed and discussed.
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Affiliation(s)
- G Pulina
- Department of Agricultural Science, University of Sassari, Sassari 07100, Italy
| | - M J Milán
- Group of Research in Ruminants (G2R), Department of Animal and Food Sciences, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - M P Lavín
- Instituto de Ganadería de Montaña, Consejo Superior de Investigaciones Científicas (CSIC), Grulleros 24346, León, Spain
| | - A Theodoridis
- Laboratory of Animal Production Economics, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - E Morin
- Institut de l'Élevage, Castanet Tolosan 31321, France
| | - J Capote
- Canary Islands Institute of Agricultural Research (ICIA), La Laguna 38200, Tenerife, Spain
| | - D L Thomas
- Department of Animal Sciences, University of Wisconsin-Madison, Madison 53706
| | - A H D Francesconi
- Department of Agricultural Science, University of Sassari, Sassari 07100, Italy.
| | - G Caja
- Group of Research in Ruminants (G2R), Department of Animal and Food Sciences, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
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Murphy TW, Berger YM, Holman PW, Baldin M, Burgett RL, Thomas DL. Estimates of genetic parameters, genetic trends, and inbreeding in a crossbred dairy sheep research flock in the United States. J Anim Sci 2018; 95:4300-4309. [PMID: 29108066 DOI: 10.2527/jas2017.1844] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
For the past 2 decades, the Spooner Agriculture Research Station (ARS) of the University of Wisconsin-Madison operated the only dairy sheep research flock in North America. The objectives of the present study were to 1) obtain estimates of genetic parameters for lactation and reproductive traits in dairy ewes, 2) estimate the amount of genetic change in these traits over time, and 3) quantify the level of inbreeding in this flock over the last 20 yr. Multiple-trait repeatability models (MTRM) were used to analyze ewe traits through their first 6 parities. The first MTRM jointly analyzed milk (180-d-adjusted milk yield [180d MY]), fat (180-d-adjusted fat yield [180d FY]), and protein (180-d-adjusted protein yield [180d PY]) yields adjusted to 180 d of lactation; number of lambs born per ewe lambing (NLB); and lactation average test-day somatic cell score (LSCS). A second MTRM analyzed 180d MY, NLB, LSCS, and percentage milk fat (%F) and percentage milk protein (%P). The 3 yield traits were moderately heritable (0.26 to 0.32) and strongly genetically correlated (0.91 to 0.96). Percentage milk fat and %P were highly heritable (0.53 and 0.61, respectively) and moderately genetically correlated (0.61). Milk yield adjusted to 180 d was negatively genetically correlated with %F and %P (-0.31 and -0.34, respectively). Ewe prolificacy was not significantly ( > 0.67) genetically correlated with yield traits, %P, or LSCS but lowly negatively correlated with %F (-0.26). Lactation somatic cell score was unfavorably genetically correlated with yield traits (0.28 to 0.39) but not significantly ( > 0.09) correlated with %F, %P, and NLB. Within-trait multiple-trait models through the first 4 parities revealed that 180d MY, 180d FY, 180d PY, %F, and %P were strongly genetically correlated across parity (0.67 to 1.00). However, the genetic correlations across parity for NLB and LSCS were somewhat lower (0.51 to 0.96). Regressing predicted breeding values for 180d MY, without and with the addition of breed effects, on ewe year of birth revealed a positive genetic gain of 2.30 and 6.24 kg/yr, respectively, over the past 20 yr in this flock. Inbreeding coefficients of ewes with an extended pedigree ranged from 0.0 to 0.29, with an average of 0.07. To optimize genetic gains and avoid excessive inbreeding, the development of a national genetic improvement program should be a top priority for the growing dairy sheep industry.
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Schmierer K, McDowell A, Petrova N, Carassiti D, Thomas DL, Miquel ME. Quantifying multiple sclerosis pathology in post mortem spinal cord using MRI. Neuroimage 2018; 182:251-258. [PMID: 29373838 DOI: 10.1016/j.neuroimage.2018.01.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 01/04/2018] [Accepted: 01/21/2018] [Indexed: 11/26/2022] Open
Abstract
Multiple sclerosis (MS) is a common inflammatory, demyelinating and degenerative disease of the central nervous system. The majority of people with MS present with symptoms due to spinal cord damage, and in more advanced MS a clinical syndrome resembling that of progressive myelopathy is not uncommon. Significant efforts have been undertaken to predict MS-related disability based on short-term observations, for example, the spinal cord cross-sectional area measured using MRI. The histo-pathological correlates of spinal cord MRI changes in MS are incompletely understood, however a surge of interest in tissue microstructure has recently led to new approaches to improve the precision with which MRI indices relate to underlying tissue features, such as myelin content, neurite density and orientation, among others. Quantitative MRI techniques including T1 and T2, magnetisation transfer (MT) and a number of diffusion-derived indices have all been successfully applied to post mortem MS spinal cord. Combining advanced quantification of histological features with quantitative - particularly diffusion-based - MRI techniques provide a new platform for high-quality MR/pathology data generation. To more accurately quantify grey matter pathology in the MS spinal cord, a key driver of physical disability in advanced MS, remains an important challenge of microstructural imaging.
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Affiliation(s)
- K Schmierer
- Queen Mary University of London, Barts and The London School of Medicine & Dentistry, Blizard Institute (Neuroscience), London, UK; Barts Health NHS Trust, Clinical Board Medicine (Neuroscience), The Royal London Hospital, London, UK.
| | - A McDowell
- UCL Great Ormond Street Institute of Child Health, Developmental Imaging and Biophysics Section, London, UK
| | - N Petrova
- Queen Mary University of London, Barts and The London School of Medicine & Dentistry, Blizard Institute (Neuroscience), London, UK
| | - D Carassiti
- Queen Mary University of London, Barts and The London School of Medicine & Dentistry, Blizard Institute (Neuroscience), London, UK
| | - D L Thomas
- UCL Institute of Neurology, Leonard Wolfson Experimental Neurology Centre, Department of Brain Repair and Rehabilitation, Queen Square, London, UK
| | - M E Miquel
- Barts Health NHS Trust, Clinical Physics, London, UK
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Solomon SS, Sulkowski MS, Amrose P, Srikrishnan AK, McFall AM, Ramasamy B, Kumar MS, Anand S, Thomas DL, Mehta SH. Directly observed therapy of sofosbuvir/ribavirin +/- peginterferon with minimal monitoring for the treatment of chronic hepatitis C in people with a history of drug use in Chennai, India (C-DOT). J Viral Hepat 2018; 25:37-46. [PMID: 28719029 PMCID: PMC5743582 DOI: 10.1111/jvh.12761] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 07/03/2017] [Indexed: 12/14/2022]
Abstract
We assessed the feasibility of field-based directly observed therapy (DOT) with minimal monitoring to deliver HCV treatment to people with a history of drug use in Chennai, India. Fifty participants were randomized 1:1 to sofosbuvir+peginterferon alfa 2a+ribavirin (SOF+PR) for 12 weeks (Arm 1) vs sofosbuvir+ribavirin (SOF+R) for 24 weeks (Arm 2). SOF+R was delivered daily at participant chosen venues and weekly peginterferon injections at the study clinic. HCV RNA testing was performed to confirm active HCV infection and sustained virologic response 12 weeks after treatment completion (SVR12). No baseline genotyping or on-treatment viral loads were performed. Median age was 46 years. All were male and 20% had significant fibrosis/cirrhosis. All self-reported history of injection drug use, 18% recent noninjection drug use and 38% alcohol dependence. Six discontinued treatment (88% completed treatment in each arm). Of 22 who completed SOF+PR, all achieved SVR12 (22/25=88%); 15 of 22 who completed SOF+R achieved SVR12 (15/25=60%; P=.05). Among those completing SOF+R, SVR12 was significantly less common in participants reporting ongoing substance use (36% vs 100%) and missed doses. Active substance use and missed doses did not impact SVR with SOF+PR. Field-based DOT of HCV therapy without real-time HCV RNA monitoring was feasible; however, achieving 100% adherence was challenging. SOF+PR appeared superior to SOF+R in achieving SVR12, even when doses were missed with no discontinuations due to side effects. Further exploration of short duration treatment with peginterferon plus direct-acting antivirals is warranted.
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Affiliation(s)
- S S Solomon
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
- YR Gaitonde Centre for AIDS Research and Education, Chennai, India
| | - M S Sulkowski
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - P Amrose
- YR Gaitonde Centre for AIDS Research and Education, Chennai, India
| | - A K Srikrishnan
- YR Gaitonde Centre for AIDS Research and Education, Chennai, India
| | - A M McFall
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - B Ramasamy
- YR Gaitonde Centre for AIDS Research and Education, Chennai, India
| | - M S Kumar
- YR Gaitonde Centre for AIDS Research and Education, Chennai, India
| | - S Anand
- YR Gaitonde Centre for AIDS Research and Education, Chennai, India
| | - D L Thomas
- Department of Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - S H Mehta
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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Murphy TW, Berger YM, Holman PW, Baldin M, Burgett RL, Thomas DL. Factors affecting ewe performance in a crossbred dairy sheep research flock in the United States. J Anim Sci 2017; 95:1892-1899. [PMID: 28727024 DOI: 10.2527/jas.2016.1175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The Spooner Agricultural Research Station operated the only dairy sheep research flock in North America through 2016. The original nondairy ewe flock was "bred up" to a crossbred dairy flock through the use of rams and semen of the East Friesian (EF) and Lacaune (LA) dairy breeds. The objective of this study was to determine the environmental and nonadditive genetic effects that influence performance of dairy ewes. The traits analyzed were 180 d adjusted milk (180d MY), fat (180d FY), and protein (180d PY) yields, percentage fat (%F) and protein (%P) in milk, lactation average somatic cell score (LSCS), and number of lambs born per ewe lambing (NLB). The univariate repeatability models included the fixed effects of year of lambing, age, weaning system (except for the trait of NLB), individual breed composition, and individual retained heterosis along with the random additive genetic, permanent environmental, and residual effects. Estimates of heritability were moderate for 180d MY (0.32 ± 0.04), 180d FY (0.26 ± 0.04), and 180d PY (0.29 ± 0.04), high for %F (0.54 ± 0.04) and %P (0.61 ± 0.04), and low for LSCS (0.12 ± 0.03) and NLB (0.08 ± 0.02). Ewes that reared their lambs had lower ( < 0.01) 180d MY, 180d FY, 180d PY, %F, and %P and higher ( < 0.001) LSCS than ewes that had their lambs removed shortly after parturition. Relative to nondairy breeding, EF and LA breeding had positive ( < 0.001) effects on 180d MY, 180d FY, and 180d PY, but a negative ( < 0.03) effect on %P. Purebred EF ewes were predicted to have lower ( < 0.001) %F than purebred LA or nondairy ewes. Purebred LA ewes were predicted to have a higher ( < 0.001) LSCS than purebred EF or nondairy ewes. Purebred EF ewes were expected to be more ( < 0.001) prolific than purebred LA or nondairy ewes. Individual retained heterosis had a favorable ( < 0.01) effect on 180d MY, 180d FY, 180d PY, and NLB. Knowledge of the factors affecting dairy ewe performance are important for dairy sheep producers to make more informed husbandry and breeding decisions.
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Abstract
The study and clinical assessment of brain disease is currently hindered by a lack of non-invasive methods for the detailed and accurate evaluation of cerebral vascular pathology. Angiography can detect aberrant flow in larger feeding arteries/arterioles but cannot resolve the micro-vascular network. Small vessels are a key site of vascular pathology that can lead to haemorrhage and infarction, which may in turn trigger or exacerbate neurodegenerative processes. In this study, we describe a method to investigate microvascular flow anisotropy using a hybrid arterial spin labelling and multi-direction diffusion-weighted MRI sequence. We present evidence that the technique is sensitive to the mean/predominant direction of microvascular flow in localised regions of the rat cortex. The data provide proof of principle for a novel and non-invasive imaging tool to investigate cerebral micro-vascular flow patterns in healthy and disease states.
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Affiliation(s)
- J A Wells
- 1 National Institute of Radiological Sciences (NIRS), National Institute for Quantum and Radiological Science and Technology (QST), Chiba, Japan.,2 UCL Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - D L Thomas
- 3 Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, UK.,4 Leonard Wolfson Experimental Neurology Centre, UCL Institute of Neurology, London, UK
| | - T Saga
- 1 National Institute of Radiological Sciences (NIRS), National Institute for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - J Kershaw
- 1 National Institute of Radiological Sciences (NIRS), National Institute for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - I Aoki
- 1 National Institute of Radiological Sciences (NIRS), National Institute for Quantum and Radiological Science and Technology (QST), Chiba, Japan
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Vergara C, Thio C, Latanich R, Cox AL, Kirk GD, Mehta SH, Busch M, Murphy EL, Villacres MC, Peters MG, French AL, Golub E, Eron J, Lahiri CD, Shrestha S, Gustafson D, Young M, Anastos K, Aouizerat B, Kim AY, Lauer G, Thomas DL, Duggal P. Genetic basis for variation in plasma IL-18 levels in persons with chronic hepatitis C virus and human immunodeficiency virus-1 infections. Genes Immun 2017; 18:82-87. [PMID: 28300059 PMCID: PMC5408324 DOI: 10.1038/gene.2017.2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/07/2016] [Accepted: 11/08/2016] [Indexed: 12/27/2022]
Abstract
Inflammasomes are multi-protein complexes integrating pathogen-triggered signaling leading to the generation of pro-inflammatory cytokines, including interleukin-18 (IL-18). Hepatitis C virus (HCV) and human immunodeficiency virus-1 (HIV) infections are associated with elevated IL-18, suggesting inflammasome activation. However, there is marked person-to-person variation in the inflammasome response to HCV and HIV. We hypothesized that host genetics may explain this variation. To test this, we analyzed the associations of plasma IL-18 levels and polymorphisms in 10 genes in the inflammasome cascade. 1538 participants with active HIV and/or HCV infection in 3 ancestry groups are included. Samples were genotyped using the Illumina Omni 1-quad and Omni 2.5 arrays. Linear regression analyses were performed to test the association of variants with logIL-18 including HCV and HIV infection status and HIV-RNA, in each ancestry group and then meta-analyzed. Eleven highly correlated SNPs (r2=0.98-1) in the IL18-BCO2 region were significantly associated with logIL-18; Each T allele of rs80011693 confers a decrease of 0.06 log pg/mL of IL-18 after adjusting for covariates (rs80011693; rs111311302 β=-0.06, P-value=2.7×10-4). In conclusion, genetic variation in IL18 is associated with IL-18 production in response to HIV and HCV infection and may explain variability in the inflammatory outcomes of chronic viral infections.
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Affiliation(s)
- C Vergara
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - C Thio
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - R Latanich
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - A L Cox
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - G D Kirk
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - S H Mehta
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - M Busch
- University of California, San Francisco, CA, USA
| | - E L Murphy
- University of California, San Francisco, CA, USA.,Blood Systems Research Institute, San Francisco, CA, USA
| | - M C Villacres
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - M G Peters
- Blood Systems Research Institute, San Francisco, CA, USA
| | - A L French
- CORE Center/Stroger Hospital of Cook County, Chicago, IL, USA
| | - E Golub
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - J Eron
- University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - C D Lahiri
- School of Medicine, Emory University, Atlanta, GA, USA
| | - S Shrestha
- The University of Alabama at Birmingham, AL, USA
| | - D Gustafson
- State University of New York-Downstate Medical Center, New York, NY, USA
| | - M Young
- Georgetown University Medical Center, Washington, DC, USA
| | - K Anastos
- Albert Einstein College of Medicine and Montefiore Medical Center, New York, NY, USA
| | - B Aouizerat
- Bluestone Center for Clinical Research, New York University, New York, NY, USA.,Department of Oral and Maxillofacial Surgery, New York University, New York, NY, USA
| | - A Y Kim
- Massachusetts General Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - G Lauer
- Massachusetts General Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - D L Thomas
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - P Duggal
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
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Storelli L, Pagani E, Rocca MA, Horsfield MA, Gallo A, Bisecco A, Battaglini M, De Stefano N, Vrenken H, Thomas DL, Mancini L, Ropele S, Enzinger C, Preziosa P, Filippi M. A Semiautomatic Method for Multiple Sclerosis Lesion Segmentation on Dual-Echo MR Imaging: Application in a Multicenter Context. AJNR Am J Neuroradiol 2016; 37:2043-2049. [PMID: 27444938 DOI: 10.3174/ajnr.a4874] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 05/11/2016] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The automatic segmentation of MS lesions could reduce time required for image processing together with inter- and intraoperator variability for research and clinical trials. A multicenter validation of a proposed semiautomatic method for hyperintense MS lesion segmentation on dual-echo MR imaging is presented. MATERIALS AND METHODS The classification technique used is based on a region-growing approach starting from manual lesion identification by an expert observer with a final segmentation-refinement step. The method was validated in a cohort of 52 patients with relapsing-remitting MS, with dual-echo images acquired in 6 different European centers. RESULTS We found a mathematic expression that made the optimization of the method independent of the need for a training dataset. The automatic segmentation was in good agreement with the manual segmentation (dice similarity coefficient = 0.62 and root mean square error = 2 mL). Assessment of the segmentation errors showed no significant differences in algorithm performance between the different MR scanner manufacturers (P > .05). CONCLUSIONS The method proved to be robust, and no center-specific training of the algorithm was required, offering the possibility for application in a clinical setting. Adoption of the method should lead to improved reliability and less operator time required for image analysis in research and clinical trials in MS.
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Affiliation(s)
- L Storelli
- From the Neuroimaging Research Unit (L.S., E.P., M.A.R., P.P., M.F.)
| | - E Pagani
- From the Neuroimaging Research Unit (L.S., E.P., M.A.R., P.P., M.F.)
| | - M A Rocca
- From the Neuroimaging Research Unit (L.S., E.P., M.A.R., P.P., M.F.)
- Institute of Experimental Neurology, Division of Neuroscience, Department of Neurology (M.A.R., P.P., M.F.), San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
| | - M A Horsfield
- Xinapse Systems (M.A.H.), Colchester, United Kingdom
| | - A Gallo
- MRI Center "SUN-FISM" and Institute of Diagnosis and Care "Hermitage-Capodimonte" (A.G., A.B.)
- I Division of Neurology, Department of Medical, Surgical, Neurological, Metabolic and Aging Sciences (A.G., A.B.), Second University of Naples, Naples, Italy
| | - A Bisecco
- MRI Center "SUN-FISM" and Institute of Diagnosis and Care "Hermitage-Capodimonte" (A.G., A.B.)
- I Division of Neurology, Department of Medical, Surgical, Neurological, Metabolic and Aging Sciences (A.G., A.B.), Second University of Naples, Naples, Italy
| | - M Battaglini
- Department of Neurological and Behavioral Sciences (M.B., N.D.S.), University of Siena, Italy
| | - N De Stefano
- Department of Neurological and Behavioral Sciences (M.B., N.D.S.), University of Siena, Italy
| | - H Vrenken
- Department of Radiology and Nuclear Medicine, MS Centre Amsterdam (H.V.), VU Medical Centre, Amsterdam, the Netherlands
| | - D L Thomas
- Neuroradiological Academic Unit (D.L.T., L.M.), UCL Institute of Neurology, London, United Kingdom
| | - L Mancini
- Neuroradiological Academic Unit (D.L.T., L.M.), UCL Institute of Neurology, London, United Kingdom
| | - S Ropele
- Department of Neurology (S.R., C.E.)
| | - C Enzinger
- Department of Neurology (S.R., C.E.)
- Clinical Division of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology (C.E.), Medical University of Graz, Austria
| | - P Preziosa
- From the Neuroimaging Research Unit (L.S., E.P., M.A.R., P.P., M.F.)
- Institute of Experimental Neurology, Division of Neuroscience, Department of Neurology (M.A.R., P.P., M.F.), San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
| | - M Filippi
- From the Neuroimaging Research Unit (L.S., E.P., M.A.R., P.P., M.F.)
- Institute of Experimental Neurology, Division of Neuroscience, Department of Neurology (M.A.R., P.P., M.F.), San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
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Falade-Nwulia O, McAdams-Mahmoud A, Irvin R, Niculescu A, Page KR, Mix M, Thomas DL, Sulkowski MS, Mehta SH. Primary Care Providers Knowledge, Attitude and Practices Related to Hepatitis C Screening and Treatment in the Oral Direct Acting Antiviral Agents Era. ACTA ACUST UNITED AC 2016; 6. [PMID: 28083156 PMCID: PMC5221662 DOI: 10.4172/2161-0711.1000481] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background There are over 3 million Americans infected with hepatitis C virus (HCV). Despite recent advances in HCV treatment, a major barrier to care remains a limited number of treaters. HCV therapy provision by primary care providers (PCPs) could expand access by increasing the pool of HCV treating clinicians. Objective To characterize current HCV care practices, willingness and self-efficacy of PCPs to become HCV treaters. Design, participants and main measures Two hundred and seventy one PCPs were identified from community clinics affiliated with a large academic center and 4 large federally qualified health centers in Baltimore, MD. An internet-based survey was administered to assess provider demographics, clinical practice site and willingness to provide HCV care. Factors associated with willingness to provide HCV care were examined using odds ratios (OR). Key results Among 129 (48%) PCPs who responded, the majority (70%) had an MD/DO degree and were white (60%). Only a few PCPs, 12 (10%), had treated at least 1 patient for HCV in the prior year. Although only 22% agreed that HCV treatment should be provided by PCPs, 84% were interested in more HCV training. Willingness to provide treatment was strongly linked to having a high proportion of HCV-infected patients (>20% versus <20%; OR 3.9; 95% confidence interval [CI] 1.5–10) and availability of other services at the primary care site including HIV treatment (OR 6.5; 95% CI 2.5–16.5), substance abuse treatment (OR 3.3; 95% CI 1.3–8.4) and mental health services (OR 4.9; 95% CI 2.0–12.1). Conclusion These data suggest that efforts to expand HCV medical provider capacity will be most impactful if they initially focus HCV training on PCPs with a high prevalence of HCV among their patients and existing systems to support HCV care.
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Affiliation(s)
| | | | - R Irvin
- Johns Hopkins University School of Medicine, Baltimore, USA
| | - A Niculescu
- Johns Hopkins University School of Medicine, Baltimore, USA
| | - K R Page
- Johns Hopkins University School of Medicine, Baltimore, USA
| | - M Mix
- Johns Hopkins University School of Medicine, Baltimore, USA
| | - D L Thomas
- Johns Hopkins University School of Medicine, Baltimore, USA
| | - M S Sulkowski
- Johns Hopkins University School of Medicine, Baltimore, USA
| | - S H Mehta
- Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
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Irvin R, McAdams-Mahmoud A, Hickman D, Wilson J, Fenwick W, Chen I, Irvin N, Falade-Nwulia O, Sulkowski M, Chaisson R, Thomas DL, Mehta SH. Building a Community - Academic Partnership to Enhance Hepatitis C Virus Screening. J Community Med Health Educ 2016; 6:431. [PMID: 27525192 PMCID: PMC4982512 DOI: 10.4172/2161-0711.1000431] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND An estimated 3.5 million Americans are chronically infected with hepatitis C virus (HCV). However, the majority are unaware of their HCV diagnosis and few are treated. New models are required to diagnose and link HCV infected patients to HCV care. This paper describes an innovative partnership between Sisters Together and Reaching (STAR), Inc., a community organization, and Johns Hopkins University (JHU), an academic institution, for the identification of HCV cases. METHODS STAR and JHU identified a mutual interest in increasing hepatitis C screening efforts and launched an HCV screening program which was designed to enhance STAR's existing HIV efforts. STAR and JHU used the Bergen Model of Collaborative Functioning as theoretical framework for the partnership. We used descriptive statistics to characterize the study population and correlates of HCV antibody positivity were reported in univariable/multivariable logistic regression. RESULTS From July 2014 to June 2015, 325 rapid HCV antibody tests were performed in community settings with 49 (15%) positive HCV antibody tests. 33 of the 49 HCV antibody positive individuals answered questions about their HCV testing history and 42% reported a prior positive result but were not engaged in care and 58% reported that they were unaware of their HCV status. In multivariable analysis, factors that were significantly associated with screening HCV antibody positive were increasing age (AOR: 1.06, 95% CI 1.02-1.10), male sex (AOR: 5.56, 95% CI 1.92-14.29), and history of injection drug use (AOR: 39.3, 95% CI 15.20-101.49). CONCLUSIONS The community-academic partnership was successful in identifying individuals with hepatitis C infection through a synergistic collaboration. The program data suggests that community screening may improve the hepatitis C care continuum by identifying individuals unaware of their HCV status or aware of their HCV status but not engaged in care and linking them to care.
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Affiliation(s)
- R Irvin
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - A McAdams-Mahmoud
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - D Hickman
- Sisters Together and Reaching, Incorporated, Baltimore, MD, USA
| | - J Wilson
- Sisters Together and Reaching, Incorporated, Baltimore, MD, USA
| | - W Fenwick
- Sisters Together and Reaching, Incorporated, Baltimore, MD, USA
| | - I Chen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - N Irvin
- Department of Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - O Falade-Nwulia
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - M Sulkowski
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - R Chaisson
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - DL Thomas
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - SH Mehta
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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Abstract
The objective of this study was to estimate genetic and nongenetic effects affecting survival in crossbred lambs during 3 time periods: through 1 d of age ( = 7,933), 2 to 30 d of age ( = 5,370), and 2 to 60 d of age ( = 5,216) in a population being upgraded to the dairy breeds of East Friesian and Lacaune in which lambs were artificially reared on milk replacer. Survival was analyzed for lambs born in 14 yr from 1998 to 2011 using pedigree information from 14,339 animals born in 23 yr from 1989 to 2011. Date of death, sex, age of the dam, birth type, month and year of birth, and breed composition were recorded, and the proportion of retained heterosis was calculated for each animal. Lambs were crossbreds of 2 or more breeds with 14 breeds represented in the population. Due to low mean genetic contribution of the 12 nondairy breeds, they were placed into 2 groups: meat breeds (Hampshire, Suffolk, and Texel) and maternal breeds (Romanov, Finnsheep, Dorset, Targhee, Rambouillet, Polypay, Katahdin, Arcott Rideau, and Commercial). The proportion of individual retained heterosis was positively associated ( < 0.05) with lamb survival from 2 to 30 and from 2 to 60 d of age. The predicted increase in survival of F lambs compared to purebred lambs was +8.8 and +14.6%, respectively. Predicted survival of meat breed lambs and maternal breed lambs was greater ( ≤ 0.01) than Lacaune lambs during all 3 periods. Predicted survival of East Friesian lambs was consistently lower ( ≤ 0.01) than meat breed and maternal breed lambs during all periods. The predicted survival of East Friesian lambs was numerically greater but not significantly different from Lacaune lambs. There was a lower ( < 0.01) survival of females compared to males through 1 d of age (-5.6%), but females had higher ( < 0.01) survival than males in the other 2 periods (2 to 30 d = +3.3% and 2 to 60 d = +6.0%). Through 1 d of age, lambs of triplet and greater birth types had lower ( < 0.01) survival than single lambs (-6.2%), and lambs from 1-yr-old dams had lower ( < 0.01) survival than lambs from 2-yr-old dams (+4.5%). Estimates of heritability of lamb survival were 0.14 (SE = 0.03), 0.03 (SE = 0.04), and 0.06 (SE = 0.03) for the 3 time periods, respectively. An increase in the proportion of individual retained heterosis was the most important genetic factor associated with increased lamb survival in this study.
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25
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Balagopal A, Kandathil AJ, Higgins YH, Wood J, Richer J, Quinn J, Eldred L, Li Z, Ray SC, Sulkowski MS, Thomas DL. Antiretroviral therapy, interferon sensitivity, and virologic setpoint in human immunodeficiency virus/hepatitis C virus coinfected patients. Hepatology 2014; 60:477-86. [PMID: 24706559 PMCID: PMC4110185 DOI: 10.1002/hep.27158] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 03/14/2014] [Accepted: 04/02/2014] [Indexed: 01/30/2023]
Abstract
UNLABELLED Human immunodeficiency virus (HIV) and hepatitis C virus (HCV) cause substantial mortality, especially in persons chronically infected with both viruses. HIV infection raises plasma HCV RNA levels and diminishes the response to exogenous alpha interferon (IFN). The degree to which antiretroviral therapy (ART) control of infection overcomes these HIV effects is unknown. Participants with HIV-HCV coinfection were enrolled in a trial to measure HCV viral kinetics after IFN administration (ΔHCVIFN ) twice: initially before (pre-ART) and then after (post-ART) HIV RNA suppression. Liver tissue was obtained 2-4 hours before each IFN injection to measure interferon stimulated genes (ISGs). Following ART, the ΔHCVIFN at 72 hours (ΔHCVIFN,72 ) increased in 15/19 (78.9%) participants by a median (interquartile range [IQR]) of 0.11 log10 IU/mL (0.00-0.40; P < 0.05). Increases in ΔHCVIFN,72 post-ART were associated with decreased hepatic expression of several ISGs (r = -0.68; P = 0.001); a 2-fold reduction in a four-gene ISG signature predicted an increase in ΔHCVIFN,72 of 0.78 log10 IU/mL (95% confidence interval [CI] 0.36,1.20). Pre- and post-ART ΔHCVIFN,72 were closely associated (r = 0.87; P < 0.001). HCV virologic setpoint also changed after ART (ΔHCVART ): transient median increases of 0.28 log10 IU/mL were followed by eventual median decreases from baseline of 0.21 log10 IU/mL (P = 0.002). A bivariate model of HIV RNA control (P < 0.05) and increased expression of a nine-gene ISG signature (P < 0.001) predicted the eventual decreased ΔHCVART . CONCLUSION ART is associated with lower post-IFN HCV RNA levels and that change is linked to reduced hepatic ISG expression. These data support recommendations to provide ART prior to IFN-based treatment of HCV and may provide insights into the pathogenesis of HIV-HCV coinfection.
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Affiliation(s)
- A Balagopal
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - AJ Kandathil
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - YH Higgins
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - J Wood
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - J Richer
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - J Quinn
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - L Eldred
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - Z Li
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - SC Ray
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - MS Sulkowski
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
| | - DL Thomas
- Department of Medicine, Johns Hopkins University Baltimore, MD 21205
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Samson RS, Kolappan M, Thomas DL, Symms MR, Connick P, Miller DH, Wheeler-Kingshott CAM. Development of a high-resolution fat and CSF-suppressed optic nerve DTI protocol at 3T: application in multiple sclerosis. Funct Neurol 2014; 28:93-100. [PMID: 24125558 DOI: 10.11138/fneur/2013.28.2.093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Clinical trials of neuroprotective interventions in multiple sclerosis require outcome measures that reflect the disease pathology. Measures of neuroaxonal integrity in the anterior visual pathways are of particular interest in this context, however imaging of the optic nerve is technically challenging. We therefore developed a 3T optic nerve diffusion tensor imaging protocol incorporating fat and cerebrospinal fluid suppression and without parallel imaging. The sequence used a scheme with six diffusion-weighted directions, b = 600 smm(-2) plus one b ≈ 0 (b(0)) and 40 repetitions, averaged offline, giving an overall scan time of 30 minutes. A coronal oblique orientation was used with voxel size 1.17 mm x 1.17 mm x 4 mm, We validated the sequence in 10 MS patients with a history of optic neuritis and 11 healthy controls: mean fractional anisotropy was reduced in the patients: 0.346(±0.159) versus 0.528(±0.123), p<0.001; radial diffusivity was increased: 0.940(±0.370)x10(-6) mm(2) s(-1) compared to 0.670(± 0.221)x10(-6) mm(2) s(-1) (p<0.01). No significant differences were seen for mean diffusivity or mean axial diffusivity.
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27
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Samson RS, Ciccarelli O, Kachramanoglou C, Brightman L, Lutti A, Thomas DL, Weiskopf N, Wheeler-Kingshott CAM. Tissue- and column-specific measurements from multi-parameter mapping of the human cervical spinal cord at 3 T. NMR Biomed 2013; 26:1823-30. [PMID: 24105923 PMCID: PMC4034603 DOI: 10.1002/nbm.3022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 06/25/2013] [Accepted: 08/09/2013] [Indexed: 05/05/2023]
Abstract
The aim of this study was to quantify a range of MR parameters [apparent proton density, longitudinal relaxation time T1, magnetisation transfer (MT) ratio, MT saturation (which represents the additional percentage MT saturation of the longitudinal magnetisation caused by a single MT pulse) and apparent transverse relaxation rate R2*] in the white matter columns and grey matter of the healthy cervical spinal cord. The cervical cords of 13 healthy volunteers were scanned at 3 T using a protocol optimised for multi-parameter mapping. Intra-subject co-registration was performed using linear registration, and tissue- and column-specific parameter values were calculated. Cervical cord parameter values measured from levels C1-C5 in 13 subjects are: apparent proton density, 4822 ± 718 a.u.; MT ratio, 40.4 ± 1.53 p.u.; MT saturation, 1.40 ± 0.12 p.u.; T1 = 1848 ± 143 ms; R2* = 22.6 ± 1.53 s(-1). Inter-subject coefficients of variation were low in both the cervical cord and tissue- and column-specific measurements, illustrating the potential of this method for the investigation of changes in these parameters caused by pathology. In summary, an optimised cervical cord multi-parameter mapping protocol was developed, enabling tissue- and column-specific measurements to be made. This technique has the potential to provide insight into the pathological processes occurring in the cervical cord affected by neurological disorders.
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Affiliation(s)
- RS Samson
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Institute of NeurologyQueen Square, London, UK
- *Correspondence to: R. Samson, UCL Institute of Neurology, Queen Square House, Queen Square, London WC1N 3BG, UK., E-mail:
| | - O Ciccarelli
- NMR Research Unit, Queen Square MS Centre, Department of Brain Repair and Rehabilitation, UCL Institute of NeurologyQueen Square, London, UK
| | - C Kachramanoglou
- NMR Research Unit, Queen Square MS Centre, Department of Brain Repair and Rehabilitation, UCL Institute of NeurologyQueen Square, London, UK
| | | | - A Lutti
- Wellcome Trust Centre for Neuroimaging, UCL Institute of NeurologyQueen Square, London, UK
| | - DL Thomas
- Neuroradiological Academic Unit, Department of Brain Repair and Rehabilitation, UCL Institute of NeurologyQueen Square, London, UK
| | - N Weiskopf
- Wellcome Trust Centre for Neuroimaging, UCL Institute of NeurologyQueen Square, London, UK
| | - CAM Wheeler-Kingshott
- NMR Research Unit, Queen Square MS Centre, Department of Neuroinflammation, UCL Institute of NeurologyQueen Square, London, UK
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Afdhal NH, Zeuzem S, Schooley RT, Thomas DL, Ward JW, Litwin AH, Razavi H, Castera L, Poynard T, Muir A, Mehta SH, Dee L, Graham C, Church DR, Talal AH, Sulkowski MS, Jacobson IMFTNPOHCVTMP. The new paradigm of hepatitis C therapy: integration of oral therapies into best practices. J Viral Hepat 2013; 20:745-60. [PMID: 24168254 PMCID: PMC3886291 DOI: 10.1111/jvh.12173] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 08/24/2013] [Indexed: 12/12/2022]
Abstract
Emerging data indicate that all-oral antiviral treatments for chronic hepatitis C virus (HCV) will become a reality in the near future. In replacing interferon-based therapies, all-oral regimens are expected to be more tolerable, more effective, shorter in duration and simpler to administer. Coinciding with new treatment options are novel methodologies for disease screening and staging, which create the possibility of more timely care and treatment. Assessments of histologic damage typically are performed using liver biopsy, yet noninvasive assessments of histologic damage have become the norm in some European countries and are becoming more widespread in the United States. Also in place are new Centers for Disease Control and Prevention (CDC) initiatives to simplify testing, improve provider and patient awareness and expand recommendations for HCV screening beyond risk-based strategies. Issued in 2012, the CDC recommendations aim to increase HCV testing among those with the greatest HCV burden in the United States by recommending one-time testing for all persons born during 1945-1965. In 2013, the United States Preventive Services Task Force adopted similar recommendations for risk-based and birth-cohort-based testing. Taken together, the developments in screening, diagnosis and treatment will likely increase demand for therapy and stimulate a shift in delivery of care related to chronic HCV, with increased involvement of primary care and infectious disease specialists. Yet even in this new era of therapy, barriers to curing patients of HCV will exist. Overcoming such barriers will require novel, integrative strategies and investment of resources at local, regional and national levels.
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Affiliation(s)
- N H Afdhal
- Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center, Harvard Medical SchoolBoston, MA, USA,*Correspondence: Nezam H. Afdhal, MD, Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center and Harvard Medical School, 110 Francis Street, Boston, MA 02215, USA., E-mail:
| | - S Zeuzem
- Department of Medicine, J.W. Goethe University HospitalFrankfurt, Germany
| | - R T Schooley
- Division of Infectious Diseases, San Diego School of Medicine, University of CaliforniaLa Jolla, CA, USA
| | - D L Thomas
- Division of Infectious Diseases, Johns Hopkins University School of MedicineBaltimore, MD, USA
| | - J W Ward
- Division of Viral Hepatitis, Centers for Disease Control and PreventionAtlanta, GA, USA
| | - A H Litwin
- Departments of Medicine and Psychiatry and Behavioral Sciences, Montefiore Medical Center, Albert Einstein College of MedicineBronx, NY, USA
| | - H Razavi
- Center for Disease AnalysisLouisville, CO, USA
| | - L Castera
- Service d'Hepatologie, Hopital Beaujon, Assistance Publique Hopitaux de ParisClichy, France
| | - T Poynard
- Service d'Hepatologie, Groupe Hospitalier Pitie-SalpetriereParis, France
| | - A Muir
- Gastroenterology and Hepatology Research Group, Duke Clinical Research InstituteDurham, NC, USA
| | - S H Mehta
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public HealthBaltimore, MD, USA
| | - L Dee
- Fair Pricing Coalition and AIDS Action BaltimoreBaltimore, MD, USA
| | - C Graham
- Division of Infectious Disease, Beth Israel Deaconess Medical CenterBoston, MA, USA
| | - D R Church
- Massachusetts Department of Public Health, Bureau of Infectious DiseaseBoston, MA, USA
| | - A H Talal
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University at BuffaloBuffalo, NY, USA
| | - M S Sulkowski
- Department of Medicine, Johns Hopkins University School of MedicineBaltimore, MD, USA
| | - I M for the New Paradigm of HCV Therapy Meeting Participants Jacobson
- Division of Gastroenterology and Hepatology, Weill Cornell Medical CollegeNew York, NY, USA,*Correspondence: Nezam H. Afdhal, MD, Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center and Harvard Medical School, 110 Francis Street, Boston, MA 02215, USA., E-mail:
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Bainbridge A, Tachtsidis I, Faulkner SD, Price D, Zhu T, Baer E, Broad KD, Thomas DL, Cady EB, Robertson NJ, Golay X. Brain mitochondrial oxidative metabolism during and after cerebral hypoxia-ischemia studied by simultaneous phosphorus magnetic-resonance and broadband near-infrared spectroscopy. Neuroimage 2013; 102 Pt 1:173-83. [PMID: 23959202 PMCID: PMC4229502 DOI: 10.1016/j.neuroimage.2013.08.016] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 07/12/2013] [Accepted: 08/09/2013] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Multimodal measurements combining broadband near-infrared spectroscopy (NIRS) and phosphorus magnetic resonance spectroscopy ((31)P MRS) assessed associations between changes in the oxidation state of cerebral mitochondrial cytochrome-c-oxidase (Δ[oxCCO]) and (31)P metabolite peak-area ratios during and after transient cerebral hypoxia-ischemia (HI) in the newborn piglet. METHODS Twenty-four piglets (aged<24 h) underwent transient HI (inspired oxygen fraction 9% and bilateral carotid artery occlusion for ~20 min). Whole-brain (31)P MRS and NIRS data were acquired every minute. Inorganic phosphate (Pi)/epp, phosphocreatine (PCr)/epp, and total nucleotide triphosphate (NTP)/epp were measured by (31)P MRS and were plotted against Δ[oxCCO] during HI and recovery (epp=exchangeable phosphate pool=Pi+PCr+2γ-NTP+β-NTP). RESULTS During HI Δ[oxCCO], PCr/epp and NTP/epp declined and Pi/epp increased. Significant correlations were seen between (31)P ratios and Δ[oxCCO]; during HI a threshold point was identified where the relationship between Δ[oxCCO] and both NTP/epp and Pi/epp changed significantly. Outcome at 48 h related to recovery of Δ[oxCCO] and (31)P ratios 1h post-HI (survived: 1-h NTP/epp 0.22 ± 0.02, Δ[oxCCO] -0.29 ± 0.50 μM; died: 1-h NTP/epp 0.10 ± 0.04, Δ[oxCCO] -2.41 ± 1.48 μM). CONCLUSIONS Both lowered Δ[oxCCO] and NTP/epp 1h post-HI indicated mitochondrial impairment. Animals dying before 48 h had slower recovery of both Δ[oxCCO] and (31)P ratios by 1 h after HI.
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Affiliation(s)
- A Bainbridge
- Medical Physics and Bioengineering, UCLH NHS Foundation Trust, London NW1 2BU, UK.
| | - I Tachtsidis
- Medical Physics and Bioengineering, University College London, WC1E 6BT, UK
| | - S D Faulkner
- Institute for Women's Health, University College London, WC1E 6AU, UK
| | - D Price
- Medical Physics and Bioengineering, UCLH NHS Foundation Trust, London NW1 2BU, UK
| | - T Zhu
- Medical Physics and Bioengineering, University College London, WC1E 6BT, UK
| | - E Baer
- Medical Physics and Bioengineering, University College London, WC1E 6BT, UK
| | - K D Broad
- Institute for Women's Health, University College London, WC1E 6AU, UK
| | - D L Thomas
- Institute of Neurology, University College London, London WC1N 3BG, UK
| | - E B Cady
- Medical Physics and Bioengineering, UCLH NHS Foundation Trust, London NW1 2BU, UK
| | - N J Robertson
- Institute for Women's Health, University College London, WC1E 6AU, UK
| | - X Golay
- Institute of Neurology, University College London, London WC1N 3BG, UK
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Osburn WO, Levine JS, Chattergoon MA, Thomas DL, Cox AL. Anti-inflammatory cytokines, pro-fibrogenic chemokines and persistence of acute HCV infection. J Viral Hepat 2013; 20:404-13. [PMID: 23647957 PMCID: PMC3793396 DOI: 10.1111/jvh.12052] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Accepted: 12/01/2012] [Indexed: 12/12/2022]
Abstract
Chemokines and cytokines play a vital role in directing and regulating immune responses to viral infections. Persistent hepatitis C virus (HCV) infection is characterized by the loss of anti-HCV cellular immune responses, while control of HCV infection is associated with maintenance of anti-HCV cellular immune responses. To determine whether plasma concentrations of 19 chemokines and cytokines controlling T-cell trafficking and function differed based on infection outcome, we compared them in at-risk subjects followed prospectively for HCV infection. Levels were compared over time in subjects who controlled HCV infection (Clearance) and subjects who developed persistent HCV infection (Persistence) at two time points during acute infection: (i) first viraemic sample (initial viraemia) and (ii) last viraemic sample in Clearance subjects and time-matched samples in Persistence subjects. At initial viraemia, increased pro-inflammatory tumour necrosis factor α (TNFα) plasma concentrations were observed in the Clearance group, while the plasma levels of anti-inflammatory interleukin (IL)-2, IL-10 and IL-13 were higher in the Persistence group. IL-13 was positively correlated with IL-2 and IL-10 at initial viraemia in the Persistence group. At the time of last viraemia, plasma levels of eotaxin, macrophage chemoattractant protein-4 (MCP-4), IL-5 and IL-10 were higher in the Persistence group and IL-10 and IL-5 levels were positively correlated. Collectively, these results suggest that the development of persistent infection is associated with an anti-inflammatory and pro-fibrogenic chemokine and cytokine profile that is evident at the onset of infection and maintained throughout acute infection.
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Affiliation(s)
- W O Osburn
- Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD, USA
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Wells JA, Siow B, Lythgoe MF, Thomas DL. The importance of RF bandwidth for effective tagging in pulsed arterial spin labeling MRI at 9.4T. NMR Biomed 2012; 25:1139-1143. [PMID: 22514019 DOI: 10.1002/nbm.2782] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 12/19/2011] [Accepted: 12/28/2011] [Indexed: 05/31/2023]
Abstract
The movement towards MRI at higher field strengths (>7T) has enhanced the appeal of arterial spin labeling (ASL) for many applications due to improved SNR of the measurements. Greater field strength also introduces increased magnetic susceptibility effects resulting in marked B(0) field inhomogeneity. Although B(0) field perturbations can be minimised by shimming over the imaging volume, marked field inhomogeneity is likely to remain within the labeling region for pulsed ASL (PASL). This study highlights a potential source of error in cerebral blood flow quantification using PASL at high field. We show that labeling efficiency in flow-sensitive alternating inversion recovery (FAIR) displayed marked sensitivity to the RF bandwidth of the inversion pulse in a rat model at 9.4T. The majority of preclinical PASL studies have not reported the bandwidth of the inversion pulse. We show that a high bandwidth pulse of > = 15 kHz was required to robustly overcome the field inhomogeneity in the labeling region at high field strength, which is significantly greater than the inversion bandwidth ~2-3 kHz used in previous studies. Unless SAR levels are at their limit, we suggest the use of a high bandwidth labeling pulse for most PASL studies.
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Affiliation(s)
- J A Wells
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK.
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Walker Harris V, Sutcliffe CG, Araujo AB, Chiu GR, Travison TG, Mehta S, Sulkowski MS, Higgins Y, Thomas DL, Dobs AS, Beck TJ, Brown TT. Hip bone geometry in HIV/HCV-co-infected men and healthy controls. Osteoporos Int 2012; 23:1779-87. [PMID: 21901477 PMCID: PMC3568923 DOI: 10.1007/s00198-011-1769-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 07/12/2011] [Indexed: 10/17/2022]
Abstract
UNLABELLED People with both HIV and hepatitis C are more likely than those with HIV alone to have wrist, hip, and spine fractures. We compared hip strength between HIV/HCV-co-infected men and healthy men and found that HIV/HCV-co-infected men had decreased hip strength due to lower lean body mass. INTRODUCTION Hepatitis C co-infection is a risk factor for fragility fracture among HIV-infected populations. Whether bone strength is compromised in HIV/HCV-co-infected patients is unknown. METHODS We compared dual-energy x-ray absorptiometry (DXA)-derived hip geometry, a measure of bone strength, in 88 HIV/HCV-co-infected men from the Johns Hopkins HIV Clinic to 289 men of similar age and race and without HIV or HCV from the Boston Area Community Health Survey/Bone Survey. Hip geometry was assessed at the narrow neck, intertrochanter, and shaft using hip structural analysis. Lean body mass (LBM), total fat mass (FM), and fat mass ratio (FMR) were measured by whole-body DXA. Linear regression was used to identify body composition parameters that accounted for differences in bone strength between cohorts. RESULTS HIV/HCV-co-infected men had lower BMI, LBM, and FM and higher FMR compared to controls (all p < 0.05). At the narrow neck, significant differences were observed between HIV/HCV-co-infected men and controls in bone mineral density, cross-sectional area, section modulus, buckling ratio, and centroid position. After adjustment for race, age, smoking status, height, and weight, only buckling ratio and centroid position remained significantly different between cohorts (all p < 0.05). Substituting LBM, FM, and FMR for weight in the multivariate model revealed that differences in LBM, but not FM or FMR, accounted for differences in all narrow neck parameters between cohorts, except buckling ratio and centroid position. CONCLUSION HIV/HCV-co-infected men have compromised hip strength at the narrow neck compared to uninfected controls, which is attributable in large part to lower lean body mass.
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Affiliation(s)
- V Walker Harris
- Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Ocama P, Castelnuovo B, Kamya MR, Kirk GD, Reynolds SJ, Kiragga A, Colebunders R, Thomas DL. Low frequency of liver enzyme elevation in HIV-infected patients attending a large urban treatment centre in Uganda. Int J STD AIDS 2011; 21:553-7. [PMID: 20975087 DOI: 10.1258/ijsa.2010.010027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Liver enzyme elevations among patients on antiretroviral therapy (ART) were determined by prospectively evaluating aspartate aminotransferase (AST) data in a cohort of patients in Kampala over 36 months. A proportion of patients had hepatitis B virus (HBV) status determined. Hepatotoxicity was graded I to IV according to the AIDS Clinical Trial Group criteria. Of 546 patients, 377 (69%) were women; overall median baseline CD4+ T-cell was 97/μL (interquartile range [IQR] 20-164). Hepatitis B surface antigen (HBsAg) was detected in 42 (9%) of 470 persons. ART included lamivudine, with either nevirapine and d4T (74%) or efavirenz and AZT (26%). Median (IQR) AST level at baseline was 35 (27, 53 IU/L). Over 36 months, only eight patients had grade III AST elevation. Neither HBsAg nor ART regimen influenced AST levels. Male gender and CD4+ change from baseline were correlated with AST elevation. Patients with HIV/HBV co-infection were not at an increased risk of AST elevation, which occurred uncommonly in this setting.
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Affiliation(s)
- P Ocama
- Infectious Diseases Institute, Makerere University College of Health Sciences, Kampala, Uganda.
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Seremba E, Ocama P, Opio CK, Kagimu M, Yuan HJ, Attar N, Thomas DL, Lee WM. Validity of the rapid strip assay test for detecting HBsAg in patients admitted to hospital in Uganda. J Med Virol 2010; 82:1334-40. [PMID: 20572076 DOI: 10.1002/jmv.21813] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Commercially available rapid strip assays (RSAs) for hepatitis B surface antigen (HBsAg) are used for most routine clinical testing in sub-Saharan Africa. This study evaluated the validity of RSA and a more sophisticated enzyme immunoassay (EIA) with confirmation by nucleic acid testing (NAT) in hospitalized patients in Uganda. Sera from 380 consecutive patients collected and tested for HBsAg and anti-HIV in Kampala, Uganda by RSA were sent frozen to Dallas for EIA including HBsAg, total anti-hepatitis B core, hepatitis B e antigen, and anti-HIV. NAT was performed on all HBsAg-positives and on a random sample of 102 patients that were HBsAg-negative by both assays. Overall, 31 (8%) were HBsAg positive by RSA while 50 (13%) were HBsAg-positive by EIA; 26 were concordant between the two assays. Of 55 HBsAg-positive patients, nearly all showed detectable serum hepatitis B virus (HBV) DNA by bDNA (46) or PCR (4) assay. The 26 patients who were HBsAg positive by both EIA and RSA had significantly higher median serum HBV DNA levels than the 24 patients who were HBsAg positive by EIA alone. An additional 12/102 (12%) HBsAg negative patients had very low serum HBV DNA levels by NAT. Several differences in expected results of serologic testing were observed in this large series of African patients. RSA HBsAg testing is less sensitive than EIA; even EIA failed to detect all HBV DNA positive sera. A more complex testing protocol than RSA alone will be needed in Africa to improve patient care.
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Affiliation(s)
- E Seremba
- Makerere University Medical School, Kampala, Uganda
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Seremba E, Ocama P, Opio CK, Kagimu M, Thomas DL, Yuan HJ, Attar N, Lee WM. Poor performance of hepatitis C antibody tests in hospital patients in Uganda. J Med Virol 2010; 82:1371-8. [PMID: 20572078 DOI: 10.1002/jmv.21817] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Most hepatitis C testing in Uganda is performed using commercial rapid strip assays (RSA) to detect antibodies to hepatitis C virus (anti-HCV), rather than enzyme immunoassays (EIA). The prevalence of hepatitis C antibodies in a Ugandan hospital population was determined using both methods to test their accuracy using nucleic acid testing (NAT) as a reference. Sera from 380 consecutive hospitalized Ugandan patients were tested for anti-HCV using an RSA in Uganda, with subsequent automated third-generation EIA testing in the United States, followed by NAT. Recombinant immunoblot assays (RIBA) were used as a supplementary test to detect anti-HCV epitopes. Overall, anti-HCV was detected in 48/380 (13%) by one or both antibody tests. Anti-HCV was detected in 19 (5.0%) patients by RSA and in 33 (8.7%) patients by EIA; only four patients were anti-HCV positive by both methods. Fourteen of the 48 anti-HCV positive patients had detectable serum HCV RNA, 7 each by bDNA assay or by PCR. RSA detected only 7 of 14 HCV RNA positive sera. Of 29 RNA negative but anti-HCV positive patients tested by RIBA, only two were anti-HCV positive; 27 were anti-HCV negative or indeterminate. Anti-HCV testing by RSA and/or EIA was neither sensitive nor specific for detection of ongoing HCV infection in hospitalized Ugandan patients. Our findings underscore the importance of confirmatory nucleic acid testing, which, despite its increased cost, appears essential to manage African patients with HCV.
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Affiliation(s)
- E Seremba
- Makerere University Medical School, Kampala, Uganda
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Abstract
The objective of this experiment was to determine the effect of protein degradability of dairy sheep diets on milk yield and protein utilization across 2 levels of milk production. Three diets were formulated to provide similar energy concentrations and varying concentrations of rumen-degradable protein (RDP) and rumen-undegradable protein (RUP): 12% RDP and 4% RUP (12-4) included basal levels of RDP and RUP, 12% RDP and 6% RUP (12-6) included additional RUP, and 14% RDP and 4% RUP (14-4) included additional RDP. Diets were composed of alfalfa-timothy cubes, whole and ground corn, whole oats, dehulled soybean meal, and expeller soybean meal (SoyPlus, West Central, Ralston, IA). Estimates of RDP and RUP were based on the Small Ruminant Nutrition System model (2008) and feed and orts were analyzed for Cornell N fractions. Eighteen multiparous dairy ewes in midlactation were divided by milk yield (low and high) into 2 blocks of 9 ewes each and were randomly assigned within block (low and high) to 3 pens of 3 ewes each. Dietary treatments were arranged in a 3 x 3 Latin square within each block and applied to pens for 14-d periods. We hypothesized that pens consuming high-RUP diets (12-6) would produce more milk and milk protein than the basal diet (12-4) and pens consuming high-RDP diets (14-4) would not produce more milk than the basal diet (12-4). Ewes in the high-milk-yield square consumed more dry matter and produced more milk, milk fat, and milk protein than ewes in the low-milk-yield square. There was no effect of dietary treatment on dry matter intake. Across both levels of milk production, the 12-6 diet increased milk yield by 14%, increased milk fat yield by 14%, and increased milk protein yield by 13% compared with the 14-4 and 12-4 diets. Gross N efficiency (milk protein N/intake protein N) was 11 and 15% greater in the 12-6 and 12-4 diets, respectively, compared with the 14-4 diet. Milk urea N concentration was greater in the 12-6 diet and tended to be greater in the 14-4 diet compared with the 12-4 diet, indicating that the excretion of urea N in this study was more closely related to dietary crude protein concentration than to protein degradability.
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Affiliation(s)
- C Mikolayunas-Sandrock
- Department of Animal Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
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Kang W, Wang L, Harrell H, Liu J, Thomas DL, Mayfield TL, Scotti MM, Ye GJ, Veres G, Knop DR. An efficient rHSV-based complementation system for the production of multiple rAAV vector serotypes. Gene Ther 2008; 16:229-39. [PMID: 18923452 DOI: 10.1038/gt.2008.158] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recombinant herpes simplex virus type 1 (rHSV)-assisted recombinant adeno-associated virus (rAAV) vector production provides a highly efficient and scalable method for manufacture of clinical grade rAAV vectors. Here, we present an rHSV co-infection system for rAAV production, which uses two ICP27-deficient rHSV constructs, one bearing the rep2 and cap (1, 2 or 9) genes of rAAV, and the second bearing an AAV2 ITR-gene of interest (GOI) cassette. The optimum rAAV production parameters were defined by producing rAAV2/GFP in HEK293 cells, yielding greater than 9000 infectious particles per cell with a 14:1 DNase resistance particle to infectious particle (DRP/ip) ratio. The optimized co-infection parameters were then used to generate large-scale stocks of rAAV1/AAT, which encode the human alpha-1-antitrypsin (hAAT) protein, and purified by column chromatography. The purified vector was extensively characterized by rAAV- and rHSV-specific assays and compared to transfection-made vector for in vivo efficacy in mice through intramuscular injection. The co-infection method was also used to produce rAAV9/AAT for comparison to rAAV1/AAT in vivo. Intramuscular administration of 1 x 10(11) DRP per animal of rHSV-produced rAAV1/AAT and rAAV9/AAT resulted in hAAT protein expression of 5.4 x 10(4) and 9.4 x 10(5) ng ml(-1) serum respectively, the latter being clinically relevant.
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Affiliation(s)
- W Kang
- Applied Genetic Technologies Corporation, Alachua, FL 32615, USA
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Mikolayunas CM, Thomas DL, Albrecht KA, Combs DK, Berger YM, Eckerman SR. Effects of supplementation and stage of lactation on performance of grazing dairy ewes. J Dairy Sci 2008; 91:1477-85. [PMID: 18349241 DOI: 10.3168/jds.2007-0466] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The majority of dairy sheep in the world are fed pasture and supplemental grain during lactation; however, no trials have reported the effects of supplementation of dairy ewes grazing improved pastures in North America. In trial 1, 56 three-year-old grazing dairy ewes in early [21 +/- 10 d in milk (DIM)] or late (136 +/- 9 DIM) lactation were fed 0 or 0.82 kg of dry matter/d per ewe of supplement (16.5% crude protein mixture of corn and a soybean meal-based high-protein pellet) in a 2 x 2 factorial arrangement of treatments. There were no significant interactions between stage of lactation and supplementation treatments. Average test-day milk production was higher in early-lactation ewes than in late-lactation ewes (1.74 vs. 1.21 kg/d, respectively). Although test-day milk protein percentage was higher in late-lactation ewes than in early-lactation ewes (5.02 vs. 4.86%, respectively), there was no difference in milk fat percentage between stages of lactation. Supplemented ewes had higher milk production (1.59 vs. 1.36 kg/d, respectively), lower milk fat percentage (5.75 vs. 6.00%, respectively), and lower milk protein percentage (4.84 vs. 5.04%, respectively) than unsupplemented ewes. Milk urea N levels were similar between the 2 stages of lactation and between the 2 supplementation treatments and were above recommended levels for dairy sheep, indicating an excess intake or inefficient utilization of protein for both supplementation treatments. In trial 2, 96 two-, three-, and four-year-old grazing dairy ewes in midlactation (112 +/- 21 DIM) were randomly assigned to 4 treatments of 0, 0.41, 0.82, or 1.24 kg of dry matter/d per ewe of whole corn. Average test-day milk production increased linearly and milk fat percentage decreased quadratically with increasing amounts of corn supplementation. Milk protein yield increased linearly, and milk urea N levels decreased quadratically with increasing amounts of corn supplementation, suggesting an improvement in the utilization of pasture protein with increasing dietary energy intake.
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Affiliation(s)
- C M Mikolayunas
- Department of Animal Sciences, University of Wisconsin-Madison, Madison 53706, USA.
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Foong J, Lee K, Nguyen C, Tang G, Austin D, Ch'ng C, Burrow MF, Thomas DL. Comparison of microshear bond strengths of four self-etching bonding systems to enamel using two test methods. Aust Dent J 2006; 51:252-7. [PMID: 17037893 DOI: 10.1111/j.1834-7819.2006.tb00438.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Recent advances in enamel and dentine adhesive technology have resulted in the emergence of many new adhesive systems. Self-etching bonding systems do not require a separate etching step and the newest systems are the "all-in-one" systems which combine etching, priming and bonding into a single application. This study reports laboratory enamel microshear bond strengths of a self-etching priming and three all-in-one systems and also evaluates two different microshear bond test methods. METHODS One hundred and nineteen enamel specimens were bonded (0.8 mm diameter) with either Clearfil Protect Bond (Kuraray), Xeno III (Dentsply), G Bond (GC) or One-Up Bond F (Tokuyama) using Palfique Estelite resin composite and stored in 37 degrees Celsius water for seven days. The microshear bond test method used either a blade or wire to apply the shear stress. Results were analysed with one-way ANOVA and post hoc (Tukey) multiple comparison analysis. RESULTS Clearfil Protect Bond demonstrated higher and more consistent bond strengths than Xeno III, G Bond or One-Up Bond F. The wire method showed much greater reliability in results, with a coefficient of variation half that of the blade method. CONCLUSIONS All-in-one adhesives seem to be less reliable than the two-step self-etching priming adhesive when bonding to enamel. Test method can significantly affect results in the microshear bond test method.
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Affiliation(s)
- J Foong
- School of Dental Science, The University of Melbourne, Victoria
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Strathdee SA, Latka M, Campbell J, O'Driscoll PT, Golub ET, Kapadia F, Pollini RA, Garfein RS, Thomas DL, Hagan H. Factors associated with interest in initiating treatment for hepatitis C Virus (HCV) infection among young HCV-infected injection drug users. Clin Infect Dis 2006; 40 Suppl 5:S304-12. [PMID: 15768339 PMCID: PMC2196220 DOI: 10.1086/427445] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE We sought to identify factors associated with interest in receiving therapy for hepatitis C virus (HCV) infection among HCV-infected injection drug users (IDUs) in 3 United States cities. METHODS IDUs aged 18-35 years who were HCV-infected and seronegative for human immunodeficiency virus underwent surveys on behaviors, experience, and interest in treatment for HCV infection and readiness to quit drug use. RESULTS Among treatment-naive IDUs (n=216), 81.5% were interested in treatment for HCV infection, but only 27.3% had seen a health-care provider since receiving a diagnosis of HCV infection. Interest in treatment for HCV infection was greater among IDUs with a high perceived threat of progressive liver disease, those with a usual source of care, those without evidence of alcohol dependence, and those with higher readiness scores for quitting drug use. Interest in treatment for HCV infection was 7-fold higher among IDUs who were told by their health-care provider that they were at risk for cirrhosis or liver cancer. CONCLUSIONS Improving provider-patient communication and integrating treatments for substance abuse and HCV may increase the proportion of IDUs who initiate treatment for HCV infection.
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Affiliation(s)
- Steffanie A Strathdee
- Department of Family and Preventive Medicine, Division of International Health and Cross-Cultural Medicine, University of California, San Diego, California 92093, USA.
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Oleksyk TK, Thio CL, Truelove AL, Goedert JJ, Donfield SM, Kirk GD, Thomas DL, O'Brien SJ, Smith MW. Single nucleotide polymorphisms and haplotypes in the IL10 region associated with HCV clearance. Genes Immun 2005; 6:347-57. [PMID: 15815689 DOI: 10.1038/sj.gene.6364188] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Hepatitis C virus (HCV) is an infectious blood-borne pathogen that usually persists as a chronic infection. However, approximately 15% of the time, patients can clear the virus, indicating that host differences could be critical in determining the course of HCV infection. The inflammatory response is crucial to resolving or failing to resolve an acute HCV infection. Some previous reports have implicated interleukin 10 (IL10) polymorphisms with successful anti-HCV therapy and natural viral clearance. We tested 54 single nucleotide polymorphisms (SNPs) in the IL10 region (+/-300 kb and 24 within the IL10 gene itself), which contains 13 genes including the IL10 immunomodulatory paralogs IL19, IL20, and IL24, for association with HCV clearance vs persistence. SNPs from two haplotype block regions, one at IL10 and the other from IL19/IL20, were associated with HCV clearance in African Americans (91 clearance cases and 183 chronically infected matched controls; P=0.05-0.002) while with expectation-maximization algorithm-reconstructed haplotypes, these associations remained (P=0.05-0.002). However, no significant associations were detected in European Americans (108 clearance and 245 chronic). Our results indicate that variants of the immunomodulatory IL10 and IL19/IL20 genes may be involved in natural clearance of HCV in the African-American population.
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Affiliation(s)
- T K Oleksyk
- Laboratory of Genomic Diversity, National Cancer Institute at Frederick, Frederick, MD 21702, USA
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Mehta SH, Netski D, Sulkowski MS, Strathdee SA, Vlahov D, Thomas DL. Liver enzyme values in injection drug users with chronic hepatitis C. Dig Liver Dis 2005; 37:674-80. [PMID: 15951255 DOI: 10.1016/j.dld.2005.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2004] [Accepted: 03/08/2005] [Indexed: 12/11/2022]
Abstract
BACKGROUND Liver enzymes fluctuate in chronic hepatitis C virus infection. However, the range that can be attributed to the course of hepatitis C virus (versus an intercurrent cause of hepatitis) is unknown. AIMS To characterise the range of liver enzyme values as a function of the upper limit of normal (ULN) of the assay among persons chronically infected with hepatitis C virus. PATIENTS One thousand and fifty-nine hepatitis C virus chronically infected individuals with > or =5 semi-annual evaluations. METHODS Alanine aminotransferase and aspartate aminotransferase levels were prospectively obtained. Potential causes of elevations were examined using serologic testing. RESULTS Among 1059 individuals, 11,463 enzyme measurements were obtained over 6.5 years, of which 63.5% were <1.25x ULN, 26.5% were 1.25-2.5x ULN, 8.3% were 2.5-5x ULN, and 1.6% were 5-10x ULN; only 0.2% were >10x ULN. Elevations >10x ULN were transient, the alanine aminotransferase/aspartate aminotransferase ratio tended to be different at the time of the elevation compared to before and after and 24% were associated with acute viral hepatitis. On the other hand, subjects with elevations 5-10x ULN tended to have elevated levels throughout follow-up and only 8% were associated with acute viral hepatitis. CONCLUSIONS Liver enzymes fluctuate up to 5x ULN in most hepatitis C virus-infected persons; clinicians should seek alternate explanations for those with higher alanine aminotransferase or aspartate aminotransferase levels, especially among hepatitis C virus-infected persons with greater than 10-fold elevations.
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Affiliation(s)
- S H Mehta
- Department of Epidemiology, Johns Hopkins School of Public Health, Baltimore, MD, USA.
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Karacki PS, Gao X, Thio CL, Thomas DL, Goedert JJ, Vlahov D, Kaslow RA, Strathdee S, Hilgartner MW, O'Brien SJ, Carrington M. MICA and recovery from hepatitis C virus and hepatitis B virus infections. Genes Immun 2005; 5:261-6. [PMID: 15029237 DOI: 10.1038/sj.gene.6364065] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The polymorphic MHC class I chain-related A (MICA) gene encodes a ligand that has different binding affinities for the NKG2D activating receptor of CD8+ T cells and natural killer (NK) cells. We hypothesized that MICA heterogeneity would affect recovery from hepatitis C virus (HCV) and hepatitis B virus (HBV) infections. To test the hypothesis, we initially typed known MICA polymorphisms for 228 persons who cleared HCV infection and 442 persons with persistent hepatitis C matched on other factors affecting viral persistence. Although MICA(*)015 was detected more than two-fold more often in persons with viral clearance (odds ratio 0.36, 95% confidence interval=0.19, 0.80), it occurred in fewer than 5% of the study population. In a similar analysis of 442 persons with chronic hepatitis B and 768 matched controls who recovered, MICA(*)015 was detected in 2.0% of persons with chronic hepatitis B and only 0.9% of controls. No significant associations were detected with other MICA polymorphisms. While further investigation may reveal a structural basis of the MICA(*)015 associations, these data provide little support for the hypothesis that differential distribution of MICA alleles substantially affects recovery from HCV and HBV infections.
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Affiliation(s)
- P S Karacki
- Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA
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Kannangai R, Molmenti E, Arrazola L, Klein A, Choti M, Thomas DL, Torbenson M. Occult hepatitis B viral DNA in liver carcinomas from a region with a low prevalence of chronic hepatitis B infection. J Viral Hepat 2004; 11:297-301. [PMID: 15230851 DOI: 10.1111/j.1365-2893.2004.00502.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Occult hepatitis B is defined by the presence of hepatitis B viral (HBV) DNA in the serum or liver in persons lacking hepatitis B surface antigen (HBsAg) in the serum. A high prevalence of occult HBV has been reported in hepatocellular carcinoma (HCC) from Asia, but little information is available on the prevalence of occult HBV in HCC from regions with a low prevalence of typical chronic hepatitis B infection. In a retrospective study, 19 cases of primary liver cancer were investigated for the presence of occult HBV DNA by amplification of the surface, core, and X gene. In addition, HBV copy numbers were quantitated by real time polymerase chain reaction, genotyped, and samples tested for covalently closed circular HBV DNA, which is a marker of active viral replication. Occult HBV was found in three of 19 cases (16%). Genotyping was successful in two cases, both of which were genotype A. HBV DNA copy numbers were low, all less than 10 copies/microg liver DNA. No closed circular HBV DNA was detected. Thus, in this study occult HBV was of genotype A and was found in a low percentage of cases of HCC and was associated with low tissue HBV DNA copy numbers and no detectable evidence for viral replication.
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Affiliation(s)
- R Kannangai
- Department of Pathology, Johns Hopkins School of Medicine, Baltimore, MD 21231, USA
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Thio CL, Goedert JJ, Mosbruger T, Vlahov D, Strathdee SA, O'Brien SJ, Astemborski J, Thomas DL. An analysis of tumor necrosis factor α gene polymorphisms and haplotypes with natural clearance of hepatitis C virus infection. Genes Immun 2004; 5:294-300. [PMID: 15071492 DOI: 10.1038/sj.gene.6364072] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The cytokine tumor necrosis factor alpha (TNF-alpha) is important in generating an immune response against a hepatitis C virus (HCV) infection. The functions of TNF-alpha may be altered by single-nucleotide polymorphisms (SNPs) in its gene, TNF. We hypothesized that SNPs in TNF may be important in determining the outcome of an HCV infection. To test this hypothesis, we typed nine TNF SNPs in a cohort of individuals with well-defined HCV outcomes. Three of these SNPs were typed in a second cohort. Data were analyzed using logistic regression stratifying by ethnicity, since rates of HCV clearance differ in black subjects versus white subjects. The SNP -863A was associated with viral clearance in black subjects (odds ratios (OR) 0.52, 95% confidence interval (CI) 0.29-0.93). Furthermore, the common wild-type haplotype -863C/-308G was associated with viral persistence in black subjects (OR 1.91, 95% CI 1.24-2.95). These findings were independent of linkage with human leukocyte antigen (HLA) alleles. Further study of this polymorphism and haplotype is needed to understand these associations and the role of TNF-alpha in determining outcomes of HCV infection.
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Affiliation(s)
- C L Thio
- Department of Medicine, Johns Hopkins University, Baltimore, MD 21231, USA.
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Thomas DL, Waldron DF, Lowe GD, Morrical DG, Meyer HH, High RA, Berger YM, Clevenger DD, Fogle GE, Gottfredson RG, Loerch SC, McClure KE, Willingham TD, Zartman DL, Zelinsky RD. Length of docked tail and the incidence of rectal prolapse in lambs. J Anim Sci 2004; 81:2725-32. [PMID: 14601875 DOI: 10.2527/2003.81112725x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A multistate cooperative study was conducted to study the current issue of tail length in docked lambs and its relationship to incidence of rectal prolapse. A total of 1,227 lambs at six locations were randomly allocated to two or three tail dock treatments: 1) short--tail was removed as close to the body as possible, 2) medium--tail was removed at a location midway between the attachment of the tail to the body and the attachment of the caudal folds to the tail, and 3) long--tail was removed at the attachment of the caudal folds to the tail. Short-docked lambs had a greater (P < 0.05) incidence of rectal prolapse (7.8%) than lambs with a medium (4.0%) or a long (1.8%) dock. Female lambs had a higher (P < 0.05) incidence of rectal prolapse than male lambs. At two stations, lambs were finished either in a feedlot on a high-concentrate diet or on pasture with no grain supplementation. At one station, with a very low incidence of rectal prolapse, there was no difference in incidence between lambs finished in the feedlot or on pasture; however, at the station with a relatively high incidence of rectal prolapse, lambs in the feedlot had a higher (P < 0.05) incidence than lambs on pasture. The half-sib estimate of heritability for the incidence of rectal prolapse was low (0.14). The results of this study strongly implicate short dock length as a cause of rectal prolapse in lambs finished on high-concentrate diets. Furthermore, the results of this study and the only other study known conducted on this issue strongly suggest that docking lambs at the site of the attachment of the caudal folds to the tail will result in a negligible incidence of rectal prolapse.
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Affiliation(s)
- D L Thomas
- Department of Animal Sciences, University of Wisconsin-Madison 53706, USA.
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Jaeggi JJ, Govindasamy-Lucey S, Berger YM, Johnson ME, McKusick BC, Thomas DL, Wendorff WL. Hard ewe's milk cheese manufactured from milk of three different groups of somatic cell counts. J Dairy Sci 2003; 86:3082-9. [PMID: 14594225 DOI: 10.3168/jds.s0022-0302(03)73908-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
As ovine milk production increases in the United States, somatic cell count (SCC) is increasingly used in routine ovine milk testing procedures as an indicator of flock health. Ovine milk was collected from 72 East Friesian-crossbred ewes that were machine milked twice daily. The milk was segregated and categorized into three different SCC groups: < 100,000 (group I); 100,000 to 1,000,000 (group II); and > 1,000,000 cells/ ml (group III). Milk was stored frozen at -19 degrees C for 4 mo. Milk was then thawed at 7 degrees C over a 3-d period before pasteurization and cheese making. Casein (CN) content and CN-to-true protein ratio decreased with increasing SCC group 3.99, 3.97, to 3.72% CN, and 81.43, 79.72, and 79.32% CN to true protein ratio, respectively. Milk fat varied from 5.49, 5.67, and 4.86% in groups I, II, and III, respectively. Hard ewe's milk cheese was made from each of the three different SCC groups using a Manchego cheese manufacturing protocol. As the level of SCC increased, the time required for visual flocculation increased, and it took longer to reach the desired firmness for cutting the coagulum. The fat and moisture contents were lower in the highest SCC cheeses. After 3 mo, total free fatty acids (FFA) contents were significantly higher in the highest SCC cheeses. Butyric and caprylic acids levels were significantly higher in group III cheeses at all stages of ripening. Cheese graders noted rancid or lipase flavor in the highest SCC level cheeses at each of the sampling points, and they also deducted points for more body and textural defects in these cheeses at 6 and 9 mo.
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Affiliation(s)
- J J Jaeggi
- Wisconsin Center for Dairy Research, University of Wisconsin, Madison 53706, USA.
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De Vita E, Thomas DL, Roberts S, Parkes HG, Turner R, Kinchesh P, Shmueli K, Yousry TA, Ordidge RJ. High resolution MRI of the brain at 4.7 Tesla using fast spin echo imaging. Br J Radiol 2003; 76:631-7. [PMID: 14500278 DOI: 10.1259/bjr/69317841] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Over recent years, high field MR scanners (3 T and above) have become increasingly widespread due to potential advantages such as higher signal-to-noise ratio. However, few examples of high resolution images covering the whole brain in reasonable acquisition times have been published to date and none have used fast spin echo (FSE), a sequence commonly employed for the acquisition of T(2) weighted images at 1.5 T. This is mostly due to the increased technical challenges associated with uniform signal generation and the increasingly restrictive constraints of current safety guidelines at high field. We investigated 10 volunteers using an FSE sequence optimized to the 4.7 T environment. This sequence allows the acquisition of 17- and 34-slice data sets with an in-plane resolution of approximately 500 microm x 500 microm and a slice thickness of 2 mm, in 5 min 40 s and 11 min 20 s, respectively. The images appear T(2) weighted, although the contrast is due to the combined effects of chosen echo time, magnetization transfer, direct radio frequency saturation and diffusion as well as the T(1) and T(2) relaxation times of the tissue. The result is an excellent detailed visualization of anatomical structures, demonstrating the great potential of 4.7 T MRI for clinical applications. This paper shows that, with careful optimization of sequence parameters, FSE imaging can be used at high field to generate images with high spatial resolution and uniform contrast across the whole brain within the prescribed power deposition limits.
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Affiliation(s)
- E De Vita
- Department of Medical Physics and Bioengineering, University College London, 12 Queen Square, London WC1N 3AR, UK
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Abstract
Due to the large cisternal storage capacity and non-vertical teat placement in most dairy ewes, machine stripping is commonly performed to remove milk not obtained by the machine. However, stripping requires individual manual intervention, lengthens the milking routine, and could inadvertently lead to overmilking of other ewes in the parlor. The objective of the present experiment was to estimate the effect of omission of machine stripping on milk production and parlor throughput. East Friesian crossbred dairy ewes that had been machine milked and stripped twice daily from d 0 to 79 postpartum, were randomly assigned to two stripping treatments for the remainder of lactation: normal stripping (S, n = 24), or no stripping (NS, n = 24). The NS ewes yielded 14% less commercial milk during the experiment, but had similar lactation length, milk composition, and somatic cell count compared to S ewes. Average machine milk yield (amount of milk obtained without manual intervention) tended to be greater for NS compared to S ewes. Average machine-on time for S ewes was longer than for NS ewes because of stripping, which may have resulted in over-milking of many ewes in the S group. Results from a milking simulation indicated that parlor throughput would increase by 33%, and overmilking would not occur when stripping was omitted from the milking routine. These results collectively suggest that residual milk left in the udder as a result of omission of machine stripping does not negatively influence milk quality and the loss in commercial milk yield could be compensated for by improved parlor throughput.
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Affiliation(s)
- B C McKusick
- Department of Animal Sciences, University of Wisconsin-Madison, Madison 53706, USA.
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Affiliation(s)
- S H Mehta
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
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