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Shi J, Wu W, Chen D, Liao Z, Sheng T, Wang Y, Yao Y, Wu Q, Liu F, Zhou R, Zhu C, Shen X, Mao Z, Ding Y, Wang W, Dotti G, Sun J, Liang X, Fang W, Zhao P, Li H, Gu Z. Lyophilized lymph nodes for improved delivery of chimeric antigen receptor T cells. NATURE MATERIALS 2024; 23:844-853. [PMID: 38448658 DOI: 10.1038/s41563-024-01825-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/31/2024] [Indexed: 03/08/2024]
Abstract
Lymph nodes are crucial organs of the adaptive immune system, orchestrating T cell priming, activation and tolerance. T cell activity and function are highly regulated by lymph nodes, which have a unique structure harbouring distinct cells that work together to detect and respond to pathogen-derived antigens. Here we show that implanted patient-derived freeze-dried lymph nodes loaded with chimeric antigen receptor T cells improve delivery to solid tumours and inhibit tumour recurrence after surgery. Chimeric antigen receptor T cells can be effectively loaded into lyophilized lymph nodes, whose unaltered meshwork and cytokine and chemokine contents promote chimeric antigen receptor T cell viability and activation. In mouse models of cell-line-derived human cervical cancer and patient-derived pancreatic cancer, delivery of chimeric antigen receptor T cells targeting mesothelin via the freeze-dried lymph nodes is more effective in preventing tumour recurrence when compared to hydrogels containing T-cell-supporting cytokines. This tissue-mediated cell delivery strategy holds promise for controlled release of various cells and therapeutics with long-term activity and augmented function.
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Affiliation(s)
- Jiaqi Shi
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China
| | - Wei Wu
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Dong Chen
- Department of Colorectal Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ziyan Liao
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China
| | - Tao Sheng
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yanfang Wang
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Yuejun Yao
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Qing Wu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China
| | - Feng Liu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China
| | - Ruyi Zhou
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Chaojie Zhu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xinyuan Shen
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | - Yuan Ding
- Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Weilin Wang
- Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Gianpietro Dotti
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Jie Sun
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China
| | - Xiao Liang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Weijia Fang
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Peng Zhao
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
| | - Hongjun Li
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China.
- Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
- Jinhua Institute, Zhejiang University, Jinhua, China.
- Key Laboratory for Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.
| | - Zhen Gu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.
- Liangzhu Laboratory, Zhejiang University, Hangzhou, China.
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China.
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
- Jinhua Institute, Zhejiang University, Jinhua, China.
- Key Laboratory for Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China.
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Browne DJ, Miller CM, Doolan DL. Technical pitfalls when collecting, cryopreserving, thawing, and stimulating human T-cells. Front Immunol 2024; 15:1382192. [PMID: 38812513 PMCID: PMC11133553 DOI: 10.3389/fimmu.2024.1382192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/29/2024] [Indexed: 05/31/2024] Open
Abstract
The collection, cryopreservation, thawing, and culture of peripheral blood mononuclear cells (PBMCs) can profoundly influence T cell viability and immunogenicity. Gold-standard PBMC processing protocols have been developed by the Office of HIV/AIDS Network Coordination (HANC); however, these protocols are not universally observed. Herein, we have explored the current literature assessing how technical variation during PBMC processing can influence cellular viability and T cell immunogenicity, noting inconsistent findings between many of these studies. Amid the mounting concerns over scientific replicability, there is growing acknowledgement that improved methodological rigour and transparent reporting is required to facilitate independent reproducibility. This review highlights that in human T cell studies, this entails adopting stringent standardised operating procedures (SOPs) for PBMC processing. We specifically propose the use of HANC's Cross-Network PBMC Processing SOP, when collecting and cryopreserving PBMCs, and the HANC member network International Maternal Pediatric Adolescent AIDS Clinical Trials (IMPAACT) PBMC Thawing SOP when thawing PBMCs. These stringent and detailed protocols include comprehensive reporting procedures to document unavoidable technical variations, such as delayed processing times. Additionally, we make further standardisation and reporting recommendations to minimise and document variability during this critical experimental period. This review provides a detailed overview of the challenges inherent to a procedure often considered routine, highlighting the importance of carefully considering each aspect of SOPs for PBMC collection, cryopreservation, thawing, and culture to ensure accurate interpretation and comparison between studies.
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Affiliation(s)
- Daniel J. Browne
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD, Australia
| | - Catherine M. Miller
- College of Medicine and Dentistry, James Cook University, Cairns, QLD, Australia
| | - Denise L. Doolan
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, Australia
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Liao Z, Jiang J, Wu W, Shi J, Wang Y, Yao Y, Sheng T, Liu F, Liu W, Zhao P, Lv F, Sun J, Li H, Gu Z. Lymph node-biomimetic scaffold boosts CAR-T therapy against solid tumor. Natl Sci Rev 2024; 11:nwae018. [PMID: 38440217 PMCID: PMC10911814 DOI: 10.1093/nsr/nwae018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/10/2023] [Accepted: 01/08/2024] [Indexed: 03/06/2024] Open
Abstract
The limited infiltration and persistence of chimeric antigen receptor (CAR)-T cells is primarily responsible for their treatment deficits in solid tumors. Here, we present a three-dimensional scaffold, inspired by the physiological process of T-cell proliferation in lymph nodes. This scaffold gathers the function of loading, delivery, activation and expansion for CAR-T cells to enhance their therapeutic effects on solid tumors. This porous device is made from poly(lactic-co-glycolic acid) by a microfluidic technique with the modification of T-cell stimulatory signals, including anti-CD3, anti-CD28 antibodies, as well as cytokines. This scaffold fosters a 50-fold CAR-T cell expansion in vitro and a 15-fold cell expansion in vivo. Particularly, it maintains long-lasting expansion of CAR-T cells for up to 30 days in a cervical tumor model and significantly inhibits the tumor growth. This biomimetic delivery strategy provides a versatile platform of cell delivery and activation for CAR-T cells in treating solid tumors.
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Affiliation(s)
- Ziyan Liao
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou 311121, China
| | - Jie Jiang
- Bone Marrow Transplantation Center of the First Affiliated Hospital and Department of Cell Biology, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Wei Wu
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jiaqi Shi
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou 311121, China
| | - Yanfang Wang
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuejun Yao
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Tao Sheng
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Feng Liu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou 311121, China
| | - Wei Liu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Peng Zhao
- Department of Medical Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Feifei Lv
- Department of Laboratory Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - Jie Sun
- Bone Marrow Transplantation Center of the First Affiliated Hospital and Department of Cell Biology, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Hongjun Li
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou 311121, China
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
- Jinhua Institute of Zhejiang University, Jinhua 321299, China
| | - Zhen Gu
- National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, Hangzhou 311121, China
- Jinhua Institute of Zhejiang University, Jinhua 321299, China
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China
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Zhang X, Ali M, Pantuck MA, Yang X, Lin CR, Bahmed K, Kosmider B, Tian Y. CD8 T cell response and its released cytokine IFN-γ are necessary for lung alveolar epithelial repair during bacterial pneumonia. Front Immunol 2023; 14:1268078. [PMID: 37954603 PMCID: PMC10639165 DOI: 10.3389/fimmu.2023.1268078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/16/2023] [Indexed: 11/14/2023] Open
Abstract
Introduction Alveolar epithelial regeneration depends on the activity of resident quiescent progenitor cells. Alveolar epithelial type II (AT2) cells are known as the alveolar epithelial progenitor cells. They exit quiescent state, proliferate rapidly in response to injury and differentiate into alveolar epithelial type I (AT1) cells to regenerate the damaged alveolar epithelium. Although AT2 cell plasticity has been a very intense field of research, the role of CD8 T cell response and their released cytokine IFN-γ, in regulating AT2 cell plasticity and alveolar epithelial repair and regeneration after injury remains largely unknown. Methods We used flow cytometry to quantify the amount of CD8 T cells in mouse lungs after bacterial pneumonia caused by Streptococcus pneumoniae. To determine whether CD8 T cells and their released cytokine IFN-γ are necessary for AT2 cell activity during alveolar epithelial regeneration, we performed loss of function studies using anti-CD8 or anti-IFN-γ monoclonal antibody (mAb) treatment in vivo. We assessed the effects of CD8 T cells and cytokine IFN-γ on AT2 cell differentiation capacity using the AT2- CD8 T cell co-culture system in vitro. Results We detected a transient wave of accumulation of CD8 T cells in mouse lungs, which coincided with the burst of AT2 cell proliferation during alveolar epithelial repair and regeneration in mice following bacterial pneumonia caused by Streptococcus pneumoniae. Depletion of CD8 T cells or neutralization of cytokine IFN-γ using anti-CD8 or anti-IFN-γ monoclonal antibody significantly reduced AT2 cell proliferation and differentiation into AT1 cells in mice after bacterial pneumonia. Furthermore, co-culture of CD8 T cells or cytokine IFN-γ with AT2 cells promoted AT2-to-AT1 cell differentiation in both murine and human systems. Conversely, blockade of IFN-γ signaling abrogated the increase in AT2-to-AT1 cell differentiation in the AT2- CD8 T cell co-culture system. Discussion Our data demonstrate that CD8 T-cell response and cytokine IFN-γ are necessary for promoting AT2 cell activity during alveolar epithelial repair and regeneration after acute lung injury caused by bacterial pneumonia.
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Affiliation(s)
- Xiaoying Zhang
- Department of Cardiovascular Sciences, Aging and Cardiovascular Discovery Center, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Mir Ali
- Department of Cardiovascular Sciences, Aging and Cardiovascular Discovery Center, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Morgan Alexandra Pantuck
- Department of Cardiovascular Sciences, Aging and Cardiovascular Discovery Center, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Xiaofeng Yang
- Department of Cardiovascular Sciences, Lemole Center for Integrated Lymphatics and Vascular Research, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Chih-Ru Lin
- Department of Microbiology, Immunology and Inflammation, Center for Inflammation and Lung Research, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Karim Bahmed
- Department of Microbiology, Immunology and Inflammation, Center for Inflammation and Lung Research, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Beata Kosmider
- Department of Microbiology, Immunology and Inflammation, Center for Inflammation and Lung Research, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
| | - Ying Tian
- Department of Cardiovascular Sciences, Aging and Cardiovascular Discovery Center, Temple University Lewis Katz School of Medicine, Philadelphia, PA, United States
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Yan J, Zhu J, Li X, Yang R, Xiao W, Huang C, Zheng C. Blocking LTB 4 signaling-mediated TAMs recruitment by Rhizoma Coptidis sensitizes lung cancer to immunotherapy. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 119:154968. [PMID: 37531900 DOI: 10.1016/j.phymed.2023.154968] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 05/31/2023] [Accepted: 07/15/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND Immune checkpoint blockade (ICB) induces durable immune responses across a spectrum of advanced cancers and revolutionizes the oncology field. However, only a subset of patients achieves long-lasting clinical benefits. Tumor-associated macrophages (TAMs) usually secrete immunosuppressive cytokines and contribute to the failure of ICB therapy. Therefore, it is crucial to mechanically manipulate the abundance and function of TAMs in the tumor microenvironment (TME), which can offer a promising molecular basis to improve the clinical response efficacy of ICB in cancer patients. PURPOSE This study aims to investigate TAMs in the immunosuppressive microenvironment to identify new therapeutic targets, improve the ability to predict and guide responses to clinical immunotherapy, and develop new strategies for immunotherapy of lung tumors. METHODS Lewis lung carcinoma (LLC) xenograft-bearing mouse models were established to analyze the antitumor activity of Rhizoma Coptidis (RC) in vivo. A systems pharmacology strategy was used to predict the correlation between RC and M2 macrophages. The effect of RC on the abundance of M2 macrophages was analyzed by flow cytometry of murine samples. Western blot was performed to analyze the expression of Leukotriene A4 hydrolase (LTA4H) and LTB4 receptor 1 (BLT1) in harvested lung cancer tissues. The impact of blocking leukotriene B4 (LTB4) signaling by RC on the recruitment of M2 macrophages was assessed in vitro and in vivo. Transwell migration assays were conducted to clarify the inhibition of macrophage migration by blocking LTB4. Lta4h-/- mice were used to investigate the sensitivity of immunotherapy to lung cancer by blocking the LTB4 signaling. RESULTS Here, we report that RC, an herbal medicine from the family Ranunculaceae, suppresses the recruitment and immunosuppressive function of TAMs, which in turn sensitizes lung cancer to ICB therapy. Firstly, a systems pharmacology strategy was proposed to identify combinatorial drugs for ICB therapy with a systems biology perspective of drug-target-pathway-TME phenotype. We predicted and verified that RC significantly inhibits tumor growth and the infiltration of M2-TAMs into TME of LLC tumor-bearing mice. Then, RC inhibits the recruitment of macrophages to the tumor TME via blocking LTB4 signaling, and suppresses the expression of immunosuppressive factors (IL-10, TGF-β and VEGF). As a result, RC enables CD8+ T cells to retain their proliferative and infiltrative abilities within the TME. Ultimately, these events promote cytotoxic T-cell-mediated clearance of tumor cells, which is further enhanced by the addition of anti-PD-L1 therapy. Furthermore, we employed LTA4H deficient mice (Lta4h-/- mice) to evaluate the antitumor efficiency, the results showed that the efficacy of immunotherapy was enhanced due to the synergistic effect of LTB4 signaling blockage and ICB inhibition, leading to remarkable inhibition of tumor growth in a mouse model of lung adenocarcinoma. CONCLUSIONS Taken together, these findings suggest that RC enhances antitumor immunity, providing a rationale for combining RC with immunotherapies as a potential anti-cancer treatment strategy.
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Affiliation(s)
- Jiangna Yan
- College of Medicine, Yan'an University, Yan'an, Shaanxi 716000, PR China
| | - Jinglin Zhu
- College of Medicine, Yan'an University, Yan'an, Shaanxi 716000, PR China
| | - Xiaolan Li
- Department of Pathology, The Second Affiliated Hospital of Air Force Medical University, Xi'an, Shaanxi 710038, PR China
| | - Ruijie Yang
- School of Life Sciences, East China Normal University, Shanghai 200241, PR China
| | - Wei Xiao
- State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Jiangsu Kanion Parmaceutical Co. Ltd., Lianyungang, Jiangsu 222001, PR China
| | - Chao Huang
- School of Basic Medical Sciences, Institute of Molecular and Translational Medicine, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
| | - Chunli Zheng
- College of Medicine, Yan'an University, Yan'an, Shaanxi 716000, PR China.
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Rivera KR, Bliton RJ, Burclaff J, Czerwinski MJ, Liu J, Trueblood JM, Hinesley CM, Breau KA, Deal HE, Joshi S, Pozdin VA, Yao M, Ziegler AL, Blikslager AT, Daniele MA, Magness ST. Hypoxia Primes Human ISCs for Interleukin-Dependent Rescue of Stem Cell Activity. Cell Mol Gastroenterol Hepatol 2023; 16:823-846. [PMID: 37562653 PMCID: PMC10520368 DOI: 10.1016/j.jcmgh.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND AND AIMS Hypoxia in the intestinal epithelium can be caused by acute ischemic events or chronic inflammation in which immune cell infiltration produces inflammatory hypoxia starving the mucosa of oxygen. The epithelium has the capacity to regenerate after some ischemic and inflammatory conditions suggesting that intestinal stem cells (ISCs) are highly tolerant to acute and chronic hypoxia; however, the impact of hypoxia on human ISC (hISC) function has not been reported. Here we present a new microphysiological system (MPS) to investigate how hypoxia affects hISCs from healthy donors and test the hypothesis that prolonged hypoxia modulates how hISCs respond to inflammation-associated interleukins (ILs). METHODS hISCs were exposed to <1.0% oxygen in the MPS for 6, 24, 48, and 72 hours. Viability, hypoxia-inducible factor 1a (HIF1a) response, transcriptomics, cell cycle dynamics, and response to cytokines were evaluated in hISCs under hypoxia. HIF stabilizers and inhibitors were screened to evaluate HIF-dependent responses. RESULTS The MPS enables precise, real-time control and monitoring of oxygen levels at the cell surface. Under hypoxia, hISCs maintain viability until 72 hours and exhibit peak HIF1a at 24 hours. hISC activity was reduced at 24 hours but recovered at 48 hours. Hypoxia induced increases in the proportion of hISCs in G1 and expression changes in 16 IL receptors. Prolyl hydroxylase inhibition failed to reproduce hypoxia-dependent IL-receptor expression patterns. hISC activity increased when treated IL1β, IL2, IL4, IL6, IL10, IL13, and IL25 and rescued hISC activity caused by 24 hours of hypoxia. CONCLUSIONS Hypoxia pushes hISCs into a dormant but reversible proliferative state and primes hISCs to respond to a subset of ILs that preserves hISC activity. These findings have important implications for understanding intestinal epithelial regeneration mechanisms caused by inflammatory hypoxia.
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Affiliation(s)
- Kristina R Rivera
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina
| | - R Jarrett Bliton
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina
| | - Joseph Burclaff
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina
| | - Michael J Czerwinski
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jintong Liu
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jessica M Trueblood
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Caroline M Hinesley
- Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Keith A Breau
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Halston E Deal
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina
| | - Shlok Joshi
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Vladimir A Pozdin
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina
| | - Ming Yao
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina
| | - Amanda L Ziegler
- Comparative Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Anthony T Blikslager
- Comparative Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Michael A Daniele
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina; Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina
| | - Scott T Magness
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, North Carolina; Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
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7
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Lui G, Minnar CM, Soon-Shiong P, Schlom J, Gameiro SR. Exploiting an Interleukin-15 Heterodimeric Agonist (N803) for Effective Immunotherapy of Solid Malignancies. Cells 2023; 12:1611. [PMID: 37371081 DOI: 10.3390/cells12121611] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/13/2023] [Accepted: 05/15/2023] [Indexed: 06/29/2023] Open
Abstract
Identifying effective immunotherapies for solid tumors remains challenging despite the significant clinical responses observed in subsets of patients treated with immune checkpoint inhibitors. Interleukin-15 (IL-15) is a promising cytokine for the treatment of cancer as it stimulates NK and CD8+ lymphocytes. However, unfavorable pharmacokinetics and safety concerns render recombinant IL-15 (rIL-15) a less attractive modality. These shortcomings were addressed by the clinical development of heterodimeric IL-15 agonists, including N803. In preclinical tumor models, N803 elicited significant Th1 immune activation and tumor suppressive effects, primarily mediated by NK and CD8+ T lymphocytes. In addition, multiple clinical studies have demonstrated N803 to be safe for the treatment of cancer patients. The combination of N803 with the immune checkpoint inhibitor nivolumab demonstrated encouraging clinical responses in nivolumab-naïve and nivolumab-refractory patients with non-small cell lung cancer. In a recent Phase II/III clinical study, most Bacillus Calmette-Guerin (BCG)-refractory bladder cancer patients treated with N803 plus BCG experienced durable complete responses. Currently, N803 is being evaluated preclinically and clinically in combination with various agents, including chemotherapeutics, immune checkpoint inhibitors, vaccines, and other immuno-oncology agents. This report will review the mechanism(s) of action of N803 and how it relates to the preclinical and clinical studies of N803.
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Affiliation(s)
- Grace Lui
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Christine M Minnar
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | | | - Jeffrey Schlom
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Sofia R Gameiro
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Mani N, Andrews D, Obeng RC. Modulation of T cell function and survival by the tumor microenvironment. Front Cell Dev Biol 2023; 11:1191774. [PMID: 37274739 PMCID: PMC10232912 DOI: 10.3389/fcell.2023.1191774] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/02/2023] [Indexed: 06/06/2023] Open
Abstract
Cancer immunotherapy is shifting paradigms in cancer care. T cells are an indispensable component of an effective antitumor immunity and durable clinical responses. However, the complexity of the tumor microenvironment (TME), which consists of a wide range of cells that exert positive and negative effects on T cell function and survival, makes achieving robust and durable T cell responses difficult. Additionally, tumor biology, structural and architectural features, intratumoral nutrients and soluble factors, and metabolism impact the quality of the T cell response. We discuss the factors and interactions that modulate T cell function and survive in the TME that affect the overall quality of the antitumor immune response.
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Affiliation(s)
- Nikita Mani
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Dathan Andrews
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
| | - Rebecca C. Obeng
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, United States
- Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH, United States
- University Hospitals Cleveland Medical Center, Cleveland, OH, United States
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9
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Rivera KR, Bliton RJ, Burclaff J, Czerwinski MJ, Liu J, Trueblood JM, Hinesley CM, Breau KA, Joshi S, Pozdin VA, Yao M, Ziegler AL, Blikslager AT, Daniele MA, Magness ST. A new microphysiological system shows hypoxia primes human ISCs for interleukin-dependent rescue of stem cell activity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.31.524747. [PMID: 36778265 PMCID: PMC9915581 DOI: 10.1101/2023.01.31.524747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Background & Aims Hypoxia in the intestinal epithelium can be caused by acute ischemic events or conditions like Inflammatory Bowel Disease (IBD) where immune cell infiltration produces 'inflammatory hypoxia', a chronic condition that starves the mucosa of oxygen. Epithelial regeneration after ischemia and IBD suggests intestinal stem cells (ISCs) are highly tolerant to acute and chronic hypoxia; however, the impact of acute and chronic hypoxia on human ISC (hISC) properties have not been reported. Here we present a new microphysiological system (MPS) to investigate how hypoxia affects hISCs isolated from healthy human tissues. We then test the hypothesis that some inflammation-associated interleukins protect hISCs during prolonged hypoxia. Methods hISCs were exposed to <1.0% oxygen in the MPS for 6-, 24-, 48- & 72hrs. Viability, HIF1α response, transcriptomics, cell cycle dynamics, and hISC response to cytokines were evaluated. Results The novel MPS enables precise, real-time control and monitoring of oxygen levels at the cell surface. Under hypoxia, hISCs remain viable until 72hrs and exhibit peak HIF1α at 24hrs. hISCs lose stem cell activity at 24hrs that recovers at 48hrs of hypoxia. Hypoxia increases the proportion of hISCs in G1 and regulates hISC capacity to respond to multiple inflammatory signals. Hypoxia induces hISCs to upregulate many interleukin receptors and hISCs demonstrate hypoxia-dependent cell cycle regulation and increased organoid forming efficiency when treated with specific interleukins. Conclusions Hypoxia primes hISCs to respond differently to interleukins than hISCs in normoxia through a transcriptional response. hISCs slow cell cycle progression and increase hISC activity when treated with hypoxia and specific interleukins. These findings have important implications for epithelial regeneration in the gut during inflammatory events.
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Affiliation(s)
- Kristina R. Rivera
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill 911 Oval Dr., Raleigh, NC, 27695 (USA)
| | - R. Jarrett Bliton
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill 911 Oval Dr., Raleigh, NC, 27695 (USA)
| | - Joseph Burclaff
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill 911 Oval Dr., Raleigh, NC, 27695 (USA)
| | - Michael J. Czerwinski
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599 (USA)
| | - Jintong Liu
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599 (USA)
| | - Jessica M. Trueblood
- Center for Gastrointestinal Biology and Disease, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Caroline M. Hinesley
- Center for Gastrointestinal Biology and Disease, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Keith A Breau
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599 (USA)
| | - Shlok Joshi
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599 (USA)
| | - Vladimir A. Pozdin
- Department of Electrical & Computer Engineering, North Carolina State University, Raleigh, NC, 27695 (USA)
| | - Ming Yao
- Department of Mechanical & Aerospace Engineering, North Carolina State University, Raleigh, NC 27695 (USA)
| | - Amanda L. Ziegler
- Center for Gastrointestinal Biology and Disease, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Anthony T. Blikslager
- Center for Gastrointestinal Biology and Disease, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
| | - Michael A. Daniele
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill 911 Oval Dr., Raleigh, NC, 27695 (USA)
- Department of Electrical & Computer Engineering, North Carolina State University, Raleigh, NC, 27695 (USA)
| | - Scott T. Magness
- Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill 911 Oval Dr., Raleigh, NC, 27695 (USA)
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599 (USA)
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599 (USA)
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10
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Cheung J, Zahorowska B, Suranyi M, Wong JKW, Diep J, Spicer ST, Verma ND, Hodgkinson SJ, Hall BM. CD4 +CD25 + T regulatory cells in renal transplantation. Front Immunol 2022; 13:1017683. [PMID: 36426347 PMCID: PMC9681496 DOI: 10.3389/fimmu.2022.1017683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 10/13/2022] [Indexed: 09/14/2023] Open
Abstract
The immune response to an allograft activates lymphocytes with the capacity to cause rejection. Activation of CD4+CD25+Foxp3+T regulatory cells (Treg) can down-regulate allograft rejection and can induce immune tolerance to the allograft. Treg represent <10% of peripheral CD4+T cells and do not markedly increase in tolerant hosts. CD4+CD25+Foxp3+T cells include both resting and activated Treg that can be distinguished by several markers, many of which are also expressed by effector T cells. More detailed characterization of Treg to identify increased activated antigen-specific Treg may allow reduction of non-specific immunosuppression. Natural thymus derived resting Treg (tTreg) are CD4+CD25+Foxp3+T cells and only partially inhibit alloantigen presenting cell activation of effector cells. Cytokines produced by activated effector cells activate these tTreg to more potent alloantigen-activated Treg that may promote a state of operational tolerance. Activated Treg can be distinguished by several molecules they are induced to express, or whose expression they have suppressed. These include CD45RA/RO, cytokine receptors, chemokine receptors that alter pathways of migration and transcription factors, cytokines and suppression mediating molecules. As the total Treg population does not increase in operational tolerance, it is the activated Treg which may be the most informative to monitor. Here we review the methods used to monitor peripheral Treg, the effect of immunosuppressive regimens on Treg, and correlations with clinical outcomes such as graft survival and rejection. Experimental therapies involving ex vivo Treg expansion and administration in renal transplantation are not reviewed.
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Affiliation(s)
- Jason Cheung
- Renal Unit, Liverpool Hospital, Sydney, NSW, Australia
| | | | - Michael Suranyi
- Renal Unit, Liverpool Hospital, Sydney, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, NSW, Australia
| | | | - Jason Diep
- Renal Unit, Liverpool Hospital, Sydney, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, NSW, Australia
| | - Stephen T. Spicer
- Renal Unit, Liverpool Hospital, Sydney, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, NSW, Australia
| | - Nirupama D. Verma
- South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, NSW, Australia
- Immune Tolerance Laboratory, Ingham Institute for Applied Medical Research, University of New South Wales (UNSW), Sydney, NSW, Australia
| | - Suzanne J. Hodgkinson
- South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, NSW, Australia
- Immune Tolerance Laboratory, Ingham Institute for Applied Medical Research, University of New South Wales (UNSW), Sydney, NSW, Australia
| | - Bruce M. Hall
- Renal Unit, Liverpool Hospital, Sydney, NSW, Australia
- South Western Sydney Clinical School, University of New South Wales (UNSW), Sydney, NSW, Australia
- Immune Tolerance Laboratory, Ingham Institute for Applied Medical Research, University of New South Wales (UNSW), Sydney, NSW, Australia
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11
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Wu J, Zou Z, Liu Y, Liu X, Zhangding Z, Xu M, Hu J. CRISPR/Cas9-induced structural variations expand in T lymphocytes in vivo. Nucleic Acids Res 2022; 50:11128-11137. [PMID: 36243978 DOI: 10.1093/nar/gkac887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/13/2022] [Accepted: 10/01/2022] [Indexed: 11/14/2022] Open
Abstract
CRISPR/Cas9 has been adapted to disrupt endogenous genes in adoptive T-lymphocyte therapy to prevent graft-versus-host disease. However, genome editing also generates prevalent deleterious structural variations (SVs), including chromosomal translocations and large deletions, raising safety concerns about reinfused T cells. Here, we dynamically monitored the progression of SVs in a mouse model of T-cell receptor (TCR)-transgenic T-cell adoptive transfer, mimicking TCR T therapeutics. Remarkably, CRISPR/Cas9-induced SVs persist and undergo clonal expansion in vivo after three weeks or even two months, evidenced by high enrichment and low junctional diversity of identified SVs post infusion. Specifically, we detected 128 expanded translocations, with 20 615 as the highest number of amplicons. The identified SVs are stochastically selected among different individuals and show an inconspicuous locus preference. Similar to SVs, viral DNA integrations are routinely detected in edited T cells and also undergo clonal expansion. The persistent SVs and viral DNA integrations in the infused T cells may constantly threaten genome integrity, drawing immediate attention to the safety of CRISPR/Cas9-engineered T cells mediated immunotherapy.
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Affiliation(s)
- Jinchun Wu
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Center for Life Sciences, Genome Editing Research Center, Peking University, Beijing 100871, China
| | - Ziye Zou
- National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing 102206, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing 102206, China
| | - Yang Liu
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Center for Life Sciences, Genome Editing Research Center, Peking University, Beijing 100871, China
| | - Xuhao Liu
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Center for Life Sciences, Genome Editing Research Center, Peking University, Beijing 100871, China
| | - Zhengrong Zhangding
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Center for Life Sciences, Genome Editing Research Center, Peking University, Beijing 100871, China
| | - Mo Xu
- National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing 102206, China
| | - Jiazhi Hu
- The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Center for Life Sciences, Genome Editing Research Center, Peking University, Beijing 100871, China
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12
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Mapping autophagosome contents identifies interleukin-7 receptor-α as a key cargo modulating CD4+ T cell proliferation. Nat Commun 2022; 13:5174. [PMID: 36055998 PMCID: PMC9440129 DOI: 10.1038/s41467-022-32718-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 08/09/2022] [Indexed: 11/09/2022] Open
Abstract
CD4+ T cells are pivotal cells playing roles in the orchestration of humoral and cytotoxic immune responses. It is known that CD4+ T cell proliferation relies on autophagy, but identification of the autophagosomal cargo involved is missing. Here we create a transgenic mouse model, to enable direct mapping of the proteinaceous content of autophagosomes in primary cells by LC3 proximity labelling. Interleukin-7 receptor-α, a cytokine receptor mostly found in naïve and memory T cells, is reproducibly detected in autophagosomes of activated CD4+ T cells. Consistently, CD4+ T cells lacking autophagy show increased interleukin-7 receptor-α surface expression, while no defect in internalisation is observed. Mechanistically, excessive surface interleukin-7 receptor-α sequestrates the common gamma chain, impairing the interleukin-2 receptor assembly and downstream signalling crucial for T cell proliferation. This study shows that key autophagy substrates can be reliably identified in this mouse model and help mechanistically unravel autophagy's contribution to healthy physiology and disease.
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13
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Liu H, Wang X, Ding R, Jiao A, Zheng H, Zhang C, Feng Z, Su Y, Yang X, Lei L, Sun L, Zhang L, Sun C, Zhang B. The Transcription Factor Zfp335 Promotes Differentiation and Persistence of Memory CD8 +T Cells by Regulating TCF-1. THE JOURNAL OF IMMUNOLOGY 2022; 209:886-895. [DOI: 10.4049/jimmunol.2200026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 06/17/2022] [Indexed: 11/05/2022]
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14
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The generation and application of antigen-specific T cell therapies for cancer and viral-associated disease. Mol Ther 2022; 30:2130-2152. [PMID: 35149193 PMCID: PMC9171249 DOI: 10.1016/j.ymthe.2022.02.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/27/2021] [Accepted: 02/03/2022] [Indexed: 11/23/2022] Open
Abstract
Immunotherapy with antigen-specific T cells is a promising, targeted therapeutic option for patients with cancer as well as for immunocompromised patients with virus infections. In this review, we characterize and compare current manufacturing protocols for the generation of T cells specific to viral and non-viral tumor-associated antigens. Specifically, we discuss: (1) the different methodologies to expand virus-specific T cell and non-viral tumor-associated antigen-specific T cell products, (2) an overview of the immunological principles involved when developing such manufacturing protocols, and (3) proposed standardized methodologies for the generation of polyclonal, polyfunctional antigen-specific T cells irrespective of donor source. Ex vivo expanded cells have been safely administered to treat numerous patients with virus-associated malignancies, hematologic malignancies, and solid tumors. Hence, we have performed a comprehensive review of the clinical trial results evaluating the safety, feasibility, and efficacy of these products in the clinic. In summary, this review seeks to provide new insights regarding antigen-specific T cell technology to benefit a rapidly expanding T cell therapy field.
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15
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Leilei Z, Kewen Z, Biao H, Fang H, Yigang W. The Role of Chemokine IL-7 in Tumor and Its Potential Antitumor Immunity. J Interferon Cytokine Res 2022; 42:243-250. [PMID: 35613386 DOI: 10.1089/jir.2021.0236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Interleukin-7 (IL-7) is a cytokine belonging to the chemokine family. It plays a key role in the differentiation, development, and maturation of T lymphocytes and B lymphocytes, which is pivotal to adaptive immunity. In addition to its role in lymphocyte development, recent studies have indicated the antitumor functions of IL-7 in the tumor microenvironment. In this review, we discuss the role of IL-7 in tumors and summarize its antitumor potential and clinical application in lymphoma, leukemia, breast cancer, colon cancer, and so on. Furthermore, the combinational strategies of IL-7 and other antitumor drugs have been also discussed.
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Affiliation(s)
- Zhang Leilei
- Xinyuan Institute of Medicine and Biotechnology, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
- Department of Pathology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
- Zhejiang Sci-Tech University Shaoxing Academy of Biomedicine, Shaoxing, China
| | - Zhou Kewen
- Department of Immunology, University of Toronto, Bachelor of Science, Toronto, Canada
| | - Huang Biao
- Xinyuan Institute of Medicine and Biotechnology, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Huang Fang
- Department of Pathology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Wang Yigang
- Xinyuan Institute of Medicine and Biotechnology, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
- Zhejiang Sci-Tech University Shaoxing Academy of Biomedicine, Shaoxing, China
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16
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Stempels F, de Wit A, Swierstra M, Maassen S, Bianchi F, van den Bogaart G, Baranov M. A sensitive and less cytotoxic assay for identification of proliferating T cells based on bioorthogonally-functionalized uridine analogue. J Immunol Methods 2022; 502:113228. [DOI: 10.1016/j.jim.2022.113228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/09/2021] [Accepted: 01/17/2022] [Indexed: 11/30/2022]
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17
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Abstract
PURPOSE OF REVIEW The persistence of HIV-1-infected cells, despite the introduction of the combinatorial antiretroviral therapy, is a major obstacle to HIV-1 eradication. Understanding the nature of HIV reservoir will lead to novel therapeutic approaches for the functional cure or eradication of the virus. In this review, we will update the recent development in imaging applications toward HIV-1/simian immunodeficiency virus (SIV) viral reservoirs research and highlight some of their limitations. RECENT FINDINGS CD4 T cells are the primary target of HIV-1/SIV and the predominant site for productive and latent reservoirs. This viral reservoir preferentially resides in lymphoid compartments that are difficult to access, which renders sampling and measurements problematical and a hurdle for understanding HIV-1 pathogenicity. Novel noninvasive technologies are needed to circumvent this and urgently help to find a cure for HIV-1. Recent technological advancements have had a significant impact on the development of imaging methodologies allowing the visualization of relevant biomarkers with high resolution and analytical capacity. Such methodologies have provided insights into our understanding of cellular and molecular interactions in health and disease. SUMMARY Imaging of the HIV-1 reservoir can provide significant insights for the nature (cell types), spatial distribution, and the role of the tissue microenvironment for its in vivo dynamics and potentially lead to novel targets for the virus elimination.
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18
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Rodríguez-Rodríguez N, Madera-Salcedo IK, Cisneros-Segura JA, García-González HB, Apostolidis SA, Saint-Martin A, Esquivel-Velázquez M, Nguyen T, Romero-Rodríguez DP, Tsokos GC, Alcocer-Varela J, Rosetti F, Crispín JC. Protein phosphatase 2A B55β limits CD8+ T cell lifespan following cytokine withdrawal. J Clin Invest 2021; 130:5989-6004. [PMID: 32750040 DOI: 10.1172/jci129479] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 07/31/2020] [Indexed: 12/13/2022] Open
Abstract
How T cells integrate environmental cues into signals that limit the magnitude and length of immune responses is poorly understood. Here, we provide data that demonstrate that B55β, a regulatory subunit of protein phosphatase 2A, represents a molecular link between cytokine concentration and apoptosis in activated CD8+ T cells. Through the modulation of AKT, B55β induced the expression of the proapoptotic molecule Hrk in response to cytokine withdrawal. Accordingly, B55β and Hrk were both required for in vivo and in vitro contraction of activated CD8+ lymphocytes. We show that this process plays a role during clonal contraction, establishment of immune memory, and preservation of peripheral tolerance. This regulatory pathway may represent an unexplored opportunity to end unwanted immune responses or to promote immune memory.
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Affiliation(s)
- Noé Rodríguez-Rodríguez
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.,Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.,Division of Rheumatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Iris K Madera-Salcedo
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - J Alejandro Cisneros-Segura
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - H Benjamín García-González
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Sokratis A Apostolidis
- Division of Rheumatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Abril Saint-Martin
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Marcela Esquivel-Velázquez
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Tran Nguyen
- Division of Rheumatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Dámaris P Romero-Rodríguez
- Flow Cytometry Core Facility, Instituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas", Mexico City, Mexico
| | - George C Tsokos
- Division of Rheumatology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Jorge Alcocer-Varela
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Florencia Rosetti
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - José C Crispín
- Departamento de Inmunología y Reumatología, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.,Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Mexico
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19
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Weber G, Strocchio L, Del Bufalo F, Algeri M, Pagliara D, Arnone CM, De Angelis B, Quintarelli C, Locatelli F, Merli P, Caruana I. Identification of New Soluble Factors Correlated With the Development of Graft Failure After Haploidentical Hematopoietic Stem Cell Transplantation. Front Immunol 2021; 11:613644. [PMID: 33584698 PMCID: PMC7878541 DOI: 10.3389/fimmu.2020.613644] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 12/14/2020] [Indexed: 11/13/2022] Open
Abstract
Graft failure is a severe complication of allogeneic hematopoietic stem cell transplantation (HSCT). The mechanisms involved in this phenomenon are still not completely understood; data available suggest that recipient T lymphocytes surviving the conditioning regimen are the main mediators of immune-mediated graft failure. So far, no predictive marker or early detection method is available. In order to identify a non-invasive and efficient strategy to diagnose this complication, as well as to find possible targets to prevent/treat it, we performed a detailed analysis of serum of eight patients experiencing graft failure after T-cell depleted HLA-haploidentical HSCT. In this study, we confirm data describing graft failure to be a complex phenomenon involving different components of the immune system, mainly driven by the IFNγ pathway. We observed a significant modulation of IL7, IL8, IL18, IL27, CCL2, CCL5 (Rantes), CCL7, CCL20 (MIP3a), CCL24 (Eotaxin2), and CXCL11 in patients experiencing graft failure, as compared to matched patients not developing this complication. For some of these factors, the difference was already present at the time of infusion of the graft, thus allowing early risk stratification. Moreover, these cytokines/chemokines could represent possible targets, providing the rationale for exploring new therapeutic/preventive strategies.
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Affiliation(s)
- Gerrit Weber
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Luisa Strocchio
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Francesca Del Bufalo
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Mattia Algeri
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Daria Pagliara
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Claudia Manuela Arnone
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Biagio De Angelis
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Concetta Quintarelli
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Franco Locatelli
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy.,Sapienza, University of Rome, Rome, Italy
| | - Pietro Merli
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
| | - Ignazio Caruana
- Department of Pediatric Hematology/Oncology, Cell and Gene Therapy, Scientific Institute for Research and Healthcare (IRCCS), Bambino Gesù Childrens' Hospital, Rome, Italy
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20
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Ge T, Jhala G, Fynch S, Akazawa S, Litwak S, Pappas EG, Catterall T, Vakil I, Long AJ, Olson LM, Krishnamurthy B, Kay TW, Thomas HE. The JAK1 Selective Inhibitor ABT 317 Blocks Signaling Through Interferon-γ and Common γ Chain Cytokine Receptors to Reverse Autoimmune Diabetes in NOD Mice. Front Immunol 2020; 11:588543. [PMID: 33343569 PMCID: PMC7746546 DOI: 10.3389/fimmu.2020.588543] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 11/04/2020] [Indexed: 01/31/2023] Open
Abstract
Cytokines that signal through the JAK-STAT pathway, such as interferon-γ (IFN-γ) and common γ chain cytokines, contribute to the destruction of insulin-secreting β cells by CD8+ T cells in type 1 diabetes (T1D). We previously showed that JAK1/JAK2 inhibitors reversed autoimmune insulitis in non-obese diabetic (NOD) mice and also blocked IFN-γ mediated MHC class I upregulation on β cells. Blocking interferons on their own does not prevent diabetes in knockout NOD mice, so we tested whether JAK inhibitor action on signaling downstream of common γ chain cytokines, including IL-2, IL-7 IL-15, and IL-21, may also affect the progression of diabetes in NOD mice. Common γ chain cytokines activate JAK1 and JAK3 to regulate T cell proliferation. We used a JAK1-selective inhibitor, ABT 317, to better understand the specific role of JAK1 signaling in autoimmune diabetes. ABT 317 reduced IL-21, IL-2, IL-15 and IL-7 signaling in T cells and IFN-γ signaling in β cells, but ABT 317 did not affect GM-CSF signaling in granulocytes. When given in vivo to NOD mice, ABT 317 reduced CD8+ T cell proliferation as well as the number of KLRG+ effector and CD44hiCD62Llo effector memory CD8+ T cells in spleen. ABT 317 also prevented MHC class I upregulation on β cells. Newly diagnosed diabetes was reversed in 94% NOD mice treated twice daily with ABT 317 while still on treatment at 40 days and 44% remained normoglycemic after a further 60 days from discontinuing the drug. Our results indicate that ABT 317 blocks common γ chain cytokines in lymphocytes and interferons in lymphocytes and β cells and are thus more effective against diabetes pathogenesis than IFN-γ receptor deficiency alone. Our studies suggest use of this class of drug for the treatment of type 1 diabetes.
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Affiliation(s)
- Tingting Ge
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia
| | - Gaurang Jhala
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia
| | - Stacey Fynch
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia
| | - Satoru Akazawa
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia
| | - Sara Litwak
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia
| | - Evan G Pappas
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia
| | - Tara Catterall
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia
| | - Ishan Vakil
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia
| | - Andrew J Long
- AbbVie Bioresearch Center, Worcester, MA, United States
| | - Lisa M Olson
- AbbVie Bioresearch Center, Worcester, MA, United States
| | - Balasubramanian Krishnamurthy
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia
| | - Thomas W Kay
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia
| | - Helen E Thomas
- Immunology and Diabetes Unit, St Vincent's Institute, Fitzroy, VIC, Australia.,Department of Medicine, St Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia
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21
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Jin Z, Li X, Zhang X, Paul D, Xu T, Wu A. Engineering the fate and function of human T-cells via 3D bioprinting. Biofabrication 2020; 13. [PMID: 33348331 DOI: 10.1088/1758-5090/abd56b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 12/21/2020] [Indexed: 12/28/2022]
Abstract
T-cell immunotherapy holds promise for the treatment of cancer, infection, and autoimmune diseases. Nevertheless, T-cell therapy is limited by low cell expansion efficiency ex vivo and functional deficits. Here we describe two 3D bioprinting systems made by different biomaterials that mimic the in vivo formation of natural lymph vessels and lymph nodes which modulate T-cell with distinct fates and functions. We observe that coaxial alginate fibers promote T-cell expansion, less exhausted and enable CD4+ T-cell differentiation into central memory-like phenotype (Tcm), CD8+ T-cells differentiation into effector memory subsets (Tem), while alginate-gelatin scaffolds bring T-cells into a relatively resting state. Both of the two bioprinting methods are strikingly different from a standard suspension system. The former bioprinting method yields a new system for T-cell therapy and the latter method can be useful for making an immune-chip to elucidate links between immune response and disease.
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Affiliation(s)
- Zhizhong Jin
- The First Hospital of China Medical University, Nanjing Street 155, Heping District, Shenyang, 110001, China., Shenyang, Liaoning, 110001, CHINA
| | - Xinda Li
- Department of Mechanical Engineering, Tsinghua University, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China., Beijing, 100084, CHINA
| | - Xinzhi Zhang
- Tsinghua University, East China Institute of Digital Medical Engineering, Shangrao, 334000, China., Medprin Regenerative Medical Technologies Co., Ltd, Shenzhen, 518102, China., Beijing, 334000, CHINA
| | - Desousa Paul
- Centre for Clinical Brain Sciences, University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK., University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh, EH16 4SB, UK., Edinburgh, EH16 4SB, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND
| | - Tao Xu
- Institute of Materials Processing Equipment and Automation, Department of Mechanical Engneering,, Tsinghua University, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China., Department of Precision Medicine and Healthcare, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, 518055, China., Beijing, 100084, CHINA
| | - Anhua Wu
- Neurosurgery, The First Hospital of China Medical University, Nanjing Street 155, Heping District, Shenyang, 110001, China., Shenyang, 110001, CHINA
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22
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Frühauf M, Zeitschel U, Höfling C, Ullm F, Rabiger FV, Alber G, Pompe T, Müller U, Roßner S. Construction of a 3D brain extracellular matrix model to study the interaction between microglia and T cells in co-culture. Eur J Neurosci 2020; 53:4034-4050. [PMID: 32954591 DOI: 10.1111/ejn.14978] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 12/24/2022]
Abstract
Neurodegenerative disorders are characterised by the activation of brain-resident microglia cells and by the infiltration of peripheral T cells. However, their interplay in disease has not been clarified yet. It is difficult to investigate complex cellular dynamics in living animals, and simple two-dimensional (2D) cell culture models do not resemble the soft 3D structure of brain tissue. Therefore, we developed a biomimetic 3D in vitro culture system for co-cultivation of microglia and T cells. As the activation and/or migration of immune cells in the brain might be affected by components of the extracellular matrix, defined 3D fibrillar collagen I-based matrices were constructed and modified with hyaluronan and/or chondroitin sulphate, resembling aspects of brain extracellular matrix. Murine microglia and spleen-derived T cells were cultured alone or in co-culture on the constructed matrices. Microglia exhibited in vivo-like morphology and T cells showed enhanced survival when co-cultured with microglia or to a minor degree in the presence of glia-conditioned medium. The open and porous fibrillar structure of the matrix allowed for cell invasion and direct cell-cell interaction, with stronger invasion of T cells. Both cell types showed no dependence on the matrix modifications. Microglia could be activated on the matrices by lipopolysaccharide resulting in interleukin-6 and tumour necrosis factor-α secretion. The findings herein indicate that biomimetic 3D matrices allow for co-cultivation and activation of primary microglia and T cells and provide useful tools to study their interaction in vitro.
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Affiliation(s)
- Marie Frühauf
- Paul Flechsig Institute for Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany.,Institute of Immunology/Molecular Pathogenesis, Centre for Biotechnology and Biomedicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany.,Institute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany
| | - Ulrike Zeitschel
- Paul Flechsig Institute for Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Corinna Höfling
- Paul Flechsig Institute for Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Franziska Ullm
- Institute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany
| | - Friederike V Rabiger
- Institute of Immunology/Molecular Pathogenesis, Centre for Biotechnology and Biomedicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Gottfried Alber
- Institute of Immunology/Molecular Pathogenesis, Centre for Biotechnology and Biomedicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Tilo Pompe
- Institute of Biochemistry, Faculty of Life Sciences, University of Leipzig, Leipzig, Germany
| | - Uwe Müller
- Institute of Immunology/Molecular Pathogenesis, Centre for Biotechnology and Biomedicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
| | - Steffen Roßner
- Paul Flechsig Institute for Brain Research, Medical Faculty, University of Leipzig, Leipzig, Germany
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23
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Lazarski CA, Datar AA, Reynolds EK, Keller MD, Bollard CM, Hanley PJ. Identification of new cytokine combinations for antigen-specific T-cell therapy products via a high-throughput multi-parameter assay. Cytotherapy 2020; 23:65-76. [PMID: 32921560 DOI: 10.1016/j.jcyt.2020.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 07/31/2020] [Accepted: 08/13/2020] [Indexed: 12/26/2022]
Abstract
Infusion of viral-specific T cells (VSTs) is an effective treatment for viral infection after stem cell transplant. Current manufacturing approaches are rapid, but growth conditions can still be further improved. To optimize VST cell products, the authors designed a high-throughput flow cytometry-based assay using 40 cytokine combinations in a 96-well plate to fully characterize T-cell viability, function, growth and differentiation. Peripheral blood mononuclear cells (PBMCs) from six consenting donors were seeded at 100 000 cells per well with pools of cytomegalovirus peptides from IE1 and pp65 and combinations of IL-15, IL-6, IL-21, interferon alpha, IL-12, IL-18, IL-4 and IL-7. Ten-day cultures were tested by 13-color flow cytometry to evaluate viable cell count, lymphocyte phenotype, memory markers and interferon gamma (IFNγ) and tumor necrosis factor alpha (TNFα) expression. Combinations of IL-15/IL-6 and IL-4/IL-7 were optimal for the expansion of viral-specific CD3+ T cells, (18-fold and 14-fold, respectively, compared with unstimulated controls). CD8+ T cells expanded 24-fold in IL-15/IL-6 and 9-fold in IL-4/IL-7 cultures (P < 0.0001). CD4+ T cells expanded 27-fold in IL-4/IL-7 and 15-fold in IL-15/IL-6 (P < 0.0001). CD45RO+ CCR7- effector memory (CD45RO+ CCR7- CD3+), central memory (CD45RO+ CCR7+ CD3+), terminal effector (CD45RO- CCR7- CD3+), and naive (CD45RO- CCR7+ CD3+). T cells were the preponderant cells (76.8% and 72.3% in IL-15/IL-6 and IL-15/IL-7 cultures, respectively). Cells cultured in both cytokine conditions were potent, with 19.4% of CD3+ cells cultured in IL-15/IL-6 producing IFNγ (7.6% producing both TNFα and IFNγ) and 18.5% of CD3+ cells grown in IL-4/IL-7 producing IFNγ (9% producing both TNFα and IFNγ). This study shows the utility of this single-plate assay to rapidly identify optimal growth conditions for VST manufacture using only 107 PBMCs.
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Affiliation(s)
- Christopher A Lazarski
- Center for Cancer and Immunology Research, Children's National Hospital, Washington, DC, USA
| | - Anushree A Datar
- Center for Cancer and Immunology Research, Children's National Hospital, Washington, DC, USA
| | - Emily K Reynolds
- Center for Cancer and Immunology Research, Children's National Hospital, Washington, DC, USA
| | - Michael D Keller
- Center for Cancer and Immunology Research, Children's National Hospital, Washington, DC, USA; Division of Allergy and Immunology, Children's National Hospital, Washington, DC, USA
| | - Catherine M Bollard
- Center for Cancer and Immunology Research, Children's National Hospital, Washington, DC, USA; Division of Blood and Marrow Transplantation, Children's National Hospital, Washington, DC, USA; The George Washington University Cancer Center, Washington, DC, USA
| | - Patrick J Hanley
- Center for Cancer and Immunology Research, Children's National Hospital, Washington, DC, USA; Division of Blood and Marrow Transplantation, Children's National Hospital, Washington, DC, USA; The George Washington University Cancer Center, Washington, DC, USA.
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24
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Co-Expression of IL-7 Improves NKG2D-Based CAR T Cell Therapy on Prostate Cancer by Enhancing the Expansion and Inhibiting the Apoptosis and Exhaustion. Cancers (Basel) 2020; 12:cancers12071969. [PMID: 32698361 PMCID: PMC7409228 DOI: 10.3390/cancers12071969] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/16/2020] [Accepted: 07/18/2020] [Indexed: 02/06/2023] Open
Abstract
Chimeric antigen receptor (CAR) T-cell therapy is a promising approach in treating solid tumors but the therapeutic effect is limited. Prostate cancer is a typical solid malignancy with invasive property and a highly immunosuppressive microenvironment. Ligands for the NKG2D receptor are primarily expressed on many cancer cells, including prostate cancer. In this study, we utilized NKG2D-based CAR to treat prostate cancer, and improved the therapeutic effect by co-expression of IL-7. The results showed that NKG2D-CAR T cells performed significantly increased cytotoxicity against prostate cancer compared to non-transduced T cells in vitro and in vivo. Moreover, the introduction of the IL-7 gene into the NKG2D-CAR backbone enhanced the production of IL-7 in an antigen-dependent manner. NKG2DIL7-CAR T cells exhibited better antitumor efficacy at 16 h and 72 h in vitro, and inhibited tumor growth in xenograft models more effectively. In mechanism, enhanced proliferation and Bcl-2 expression in CD8+ T cells, decreased apoptosis and exhaustion, and increased less-differentiated cell phenotype may be the reasons for the improved persistence and survival of NKG2DIL7-CAR T cells. In conclusion, these findings demonstrated that NKG2D is a promising option for CAR T-cell therapy on prostate cancer, and IL-7 has enhanced effect on NKG2D-based CAR T-cell immunotherapy, providing a novel adoptive cell therapy for prostate cancer either alone or in combination with IL-7.
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25
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Zongfei J, Rongyi C, Xiaomeng C, Lili M, Lingying M, Xiufang K, Xiaomin D, Zhuojun Z, Huiyong C, Ying S, Lindi J. In vitro IL-6/IL-6R Trans-Signaling in Fibroblasts Releases Cytokines That May Be Linked to the Pathogenesis of IgG4-Related Disease. Front Immunol 2020; 11:1272. [PMID: 32733444 PMCID: PMC7360847 DOI: 10.3389/fimmu.2020.01272] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 05/19/2020] [Indexed: 12/14/2022] Open
Abstract
Background: The remarkable mechanisms of storiform fibrosis and the formation of high levels of IgG4 with a pathogenic germinal center (GC) in the inflammatory tissue of IgG4-RD remains unknown and may be responsible for the unsatisfactory therapeutic effect on IgG4-related diseases when using conventional therapy. Objectives: To investigate the mechanisms of interleukin 6 (IL-6) inducing fibroblasts to produce cytokines for pathogenic GC formation in the development of IgG4-related disease (IgG4-RD). Methods: The clinical data and laboratory examinations of 56 patients with IgG4-RD were collected. IL-6 and IL-6R expression in the serum and tissues of patients with IgG4-RD and healthy controls were detected by ELISA, immunohistochemistry, and immunofluorescence. Human aorta adventitial fibroblasts (AAFs) were cultured and stimulated with IL-6/IL-6 receptor (IL-6R). The effect of IL-6/IL-6R on AAFs was determined by Luminex assays. Results: The serum IL-6 and IL-6R levels were elevated in active IgG4-RD patients and IL-6 was positively correlated with the disease activity (e.g., erythrocyte sedimentation rate [ESR], C-reactive protein [CRP], and IgG4-RD responder index). IL-6 and IL-6R expression in the tissue lesions of IgG4-related retroperitoneal fibrosis and IgG4-related sialadenitis patients were also significantly higher than that in the normal tissues. In addition, there is a relative abundance of myofibroblasts as well as IgG4+ plasma cells in the tissues of IgG4-related retroperitoneal fibrosis. α-SMA and B cell differentiation cytokines (i.e., B cell activating factor), and α-SMA and T follicular helper (Tfh) cell differentiation cytokines (e.g., IL-7, IL-12, and IL-23) were co-expressed in the local lesions. In vitro, IL-6/IL-6R significantly promoted the production of B cell activating factor, IL-7, IL-12, and IL-23 in AAFs in a dose-dependent manner. This effect was partially blocked by JAK1, JAK2, STAT3, and Akt inhibitors, respectively. Conclusions:In vitro IL-6/IL-6R trans-signaling in fibroblasts releases Tfh and B cell differentiation factors partially via the JAK2/STAT3, JAK1/STAT3, and JAK2/Akt pathways, which may be linked to the pathogenesis of IgG4-RD. This indicated that IL-6 and fibroblasts may be responsible for GC formation and fibrosis in the development of IgG4-RD. Blocking IL-6 with JAK1/2 inhibitors or inhibiting fibroblast proliferation might be beneficial for IgG4-RD treatment.
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Affiliation(s)
- Ji Zongfei
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Chen Rongyi
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Cui Xiaomeng
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Ma Lili
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Ma Lingying
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Kong Xiufang
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Dai Xiaomin
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Zhang Zhuojun
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Chen Huiyong
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Sun Ying
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
| | - Jiang Lindi
- Department of Rheumatology, Zhongshan Hospital, Fudan University, Shanghai, China.,Evidence-Based Medicine Center, Fudan University, Shanghai, China
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26
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Judge SJ, Murphy WJ, Canter RJ. Characterizing the Dysfunctional NK Cell: Assessing the Clinical Relevance of Exhaustion, Anergy, and Senescence. Front Cell Infect Microbiol 2020; 10:49. [PMID: 32117816 PMCID: PMC7031155 DOI: 10.3389/fcimb.2020.00049] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 01/24/2020] [Indexed: 12/24/2022] Open
Abstract
There is a growing body of literature demonstrating the importance of T cell exhaustion in regulating and shaping immune responses to pathogens and cancer. Simultaneously, the parallel development of therapeutic antibodies targeting inhibitory molecules associated with immune exhaustion (such as PD-1, but also TIGIT, and LAG-3) has led to a revolution in oncology with dramatic benefits in a growing list of solid and hematologic malignancies. Given this success in reinvigorating exhausted T cells and the related anti-tumor effects, there are increasing efforts to apply immune checkpoint blockade to other exhausted immune cells beyond T cells. One approach involves the reinvigoration of “exhausted” NK cells, a non-T, non-B lymphoid cell of the innate immune system. However, in contrast to the more well-defined and established molecular, genetic, and immunophenotypic characteristics of T cell exhaustion, a consensus on the defining functional and phenotypic features of NK “exhaustion” is less clear. As is well-known from T cell biology, separate and distinct molecular and cellular processes including senescence, anergy and exhaustion can lead to diminished immune effector function with different implications for immune regulation and recovery. For NK cells, it is unclear if exhaustion, anergy, and senescence entail separate and distinct entities of dysfunction, though all are typically characterized by decreased effector function or proliferation. In this review, we seek to define these distinct spheres of NK cell dysfunction, analyzing how they have been shown to impact NK biology and clinical applications, and ultimately highlight key characteristics in NK cell function, particularly in relation to the role of “exhaustion.”
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Affiliation(s)
- Sean J Judge
- Division of Surgical Oncology, Department of Surgery, University of California, Davis, Sacramento, CA, United States
| | - William J Murphy
- Department of Dermatology, University of California, Davis, Sacramento, CA, United States.,Department of Medicine, University of California, Davis, Sacramento, CA, United States
| | - Robert J Canter
- Division of Surgical Oncology, Department of Surgery, University of California, Davis, Sacramento, CA, United States
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27
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Differentiation into an Effector Memory Phenotype Potentiates HIV-1 Latency Reversal in CD4 + T Cells. J Virol 2019; 93:JVI.00969-19. [PMID: 31578289 PMCID: PMC6880164 DOI: 10.1128/jvi.00969-19] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 09/15/2019] [Indexed: 12/12/2022] Open
Abstract
By performing phenotypic analysis of latency reversal in CD4+ T cells from virally suppressed individuals, we identify the TEM subset as the largest contributor to the inducible HIV reservoir. Differential responses of memory CD4+ T cell subsets to latency-reversing agents (LRAs) demonstrate that HIV gene expression is associated with heightened expression of transcriptional pathways associated with differentiation, acquisition of effector function, and cell cycle entry. In vitro modeling of the latent HIV reservoir in memory CD4+ T cell subsets identify LRAs that reverse latency with ranges of efficiency and specificity. We found that therapeutic induction of latency reversal is associated with upregulation of identical sets of TEM-associated genes and cell surface markers shown to be associated with latency reversal in our ex vivo and in vitro models. Together, these data support the idea that the effector memory phenotype supports HIV latency reversal in CD4+ T cells. During antiretroviral therapy (ART), human immunodeficiency virus type 1 (HIV-1) persists as a latent reservoir in CD4+ T cell subsets in central memory (TCM), transitional memory (TTM), and effector memory (TEM) CD4+ T cells. We have identified differences in mechanisms underlying latency and responses to latency-reversing agents (LRAs) in ex vivo CD4+ memory T cells from virally suppressed HIV-infected individuals and in an in vitro primary cell model of HIV-1 latency. Our ex vivo and in vitro results demonstrate the association of transcriptional pathways of T cell differentiation, acquisition of effector function, and cell cycle entry in response to LRAs. Analyses of memory cell subsets showed that effector memory pathways and cell surface markers of activation and proliferation in the TEM subset are predictive of higher frequencies of cells carrying an inducible reservoir. Transcriptional profiling also demonstrated that the epigenetic machinery (known to control latency and reactivation) in the TEM subset is associated with frequencies of cells with HIV-integrated DNA and inducible HIV multispliced RNA. TCM cells were triggered to differentiate into TEM cells when they were exposed to LRAs, and this increase of TEM subset frequencies upon LRA stimulation was positively associated with higher numbers of p24+ cells. Together, these data highlight differences in underlying biological latency control in different memory CD4+ T cell subsets which harbor latent HIV in vivo and support a role for differentiation into a TEM phenotype in facilitating latency reversal. IMPORTANCE By performing phenotypic analysis of latency reversal in CD4+ T cells from virally suppressed individuals, we identify the TEM subset as the largest contributor to the inducible HIV reservoir. Differential responses of memory CD4+ T cell subsets to latency-reversing agents (LRAs) demonstrate that HIV gene expression is associated with heightened expression of transcriptional pathways associated with differentiation, acquisition of effector function, and cell cycle entry. In vitro modeling of the latent HIV reservoir in memory CD4+ T cell subsets identify LRAs that reverse latency with ranges of efficiency and specificity. We found that therapeutic induction of latency reversal is associated with upregulation of identical sets of TEM-associated genes and cell surface markers shown to be associated with latency reversal in our ex vivo and in vitro models. Together, these data support the idea that the effector memory phenotype supports HIV latency reversal in CD4+ T cells.
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28
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Nolte MA, Goedhart M, Geginat J. Maintenance of memory CD8 T cells: Divided over division. Eur J Immunol 2019; 47:1875-1879. [PMID: 29114880 DOI: 10.1002/eji.201747249] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 10/16/2017] [Indexed: 01/28/2023]
Abstract
Once generated during an infection, memory CD8+ T cells can provide long-lasting protection against reinfection with an intracellular pathogen, but the longevity of this defense depends on the ability of these pathogen-specific memory cells to be maintained. It is generally believed that the bone marrow plays an important role in this respect, where memory CD8 T cells receive reinvigorating signals from cytokines that induce homeostatic proliferation. However, in the current issue of the European Journal of Immunology, Siracusa et al. (Eur. J. Immunol. 2017. 47: 1900-1905) argue against this dogma, as they provide evidence that CD8 memory T cells in murine bone marrow are not proliferating, but largely quiescent, which protects them from elimination by the cytostatic drug Cyclophosphamide. Interestingly, this is in sharp contrast to the proliferating cell counterparts in the spleen, which are eliminated by this treatment. Here, we will discuss the impact of these results, how they relate to opposing findings by others in the field, and what the relevance of these findings is for humans and clinical applications.
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Affiliation(s)
- Martijn A Nolte
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Marieke Goedhart
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Jens Geginat
- INGM, Istituto Nazionale Genetica Molecolare "Romeo ed Enrica Invernizzi", Milan, Italy
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29
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Reed J, Wetzel SA. Trogocytosis-Mediated Intracellular Signaling in CD4 + T Cells Drives T H2-Associated Effector Cytokine Production and Differentiation. THE JOURNAL OF IMMUNOLOGY 2019; 202:2873-2887. [PMID: 30962293 DOI: 10.4049/jimmunol.1801577] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 03/13/2019] [Indexed: 12/24/2022]
Abstract
CD4+ T cells have been observed to acquire APC-derived membrane and membrane-associated molecules through trogocytosis in diverse immune settings. Despite this, the consequences of trogocytosis on the recipient T cell remain largely unknown. We previously reported that trogocytosed molecules on CD4+ T cells engage their respective surface receptors, leading to sustained TCR signaling and survival after APC removal. Using peptide-pulsed bone marrow-derived dendritic cells and transfected murine fibroblasts expressing antigenic MHC:peptide complexes as APC, we show that trogocytosis-positive CD4+ T cells display effector cytokines and transcription factor expression consistent with a TH2 phenotype. In vitro-polarized TH2 cells were found to be more efficient at performing trogocytosis than TH1 or nonpolarized CD4+ cells, whereas subsequent trogocytosis-mediated signaling induced TH2 differentiation in polarized TH1 and nonpolarized cells. Trogocytosis-positive CD4+ T cells generated in vivo also display a TH2 phenotype in both TCR-transgenic and wild-type models. These findings suggest that trogocytosis-mediated signaling impacts CD4+ T cell differentiation and effector cytokine production and may play a role in augmenting or shaping a TH2-dominant immune response.
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Affiliation(s)
- Jim Reed
- Program in Cellular, Molecular and Microbial Biology, Division of Biological Sciences, University of Montana, Missoula, MT 59812; and
| | - Scott A Wetzel
- Program in Cellular, Molecular and Microbial Biology, Division of Biological Sciences, University of Montana, Missoula, MT 59812; and .,Center for Environmental Health Sciences, University of Montana, Missoula, MT 59812
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Goedhart M, Gessel S, van der Voort R, Slot E, Lucas B, Gielen E, Hoogenboezem M, Rademakers T, Geerman S, van Buul JD, Huveneers S, Dolstra H, Anderson G, Voermans C, Nolte MA. CXCR4, but not CXCR3, drives CD8 + T-cell entry into and migration through the murine bone marrow. Eur J Immunol 2019; 49:576-589. [PMID: 30707456 DOI: 10.1002/eji.201747438] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/03/2019] [Accepted: 01/28/2019] [Indexed: 01/08/2023]
Abstract
The BM serves as a blood-forming organ, but also supports the maintenance and immune surveillance function of many T cells. Yet, in contrast to other organs, little is known about the molecular mechanisms that drive T-cell migration to and localization inside the BM. As BM accumulates many CXCR3-expressing memory CD8+ T cells, we tested the involvement of this chemokine receptor, but found that CXCR3 is not required for BM entry. In contrast, we could demonstrate that CXCR4, which is highly expressed on both naive and memory CD8+ T cells in BM, is critically important for homing of all CD8+ T-cell subsets to the BM in mice. Upon entry into the BM parenchyma, both naïve and memory CD8+ T cells locate close to sinusoidal vessels. Intravital imaging experiments revealed that CD8 T cells are surprisingly immobile and we found that they interact with ICAM-1+VCAM-1+BP-1+ perivascular stromal cells. These cells are the major source of CXCL12, but also express key survival factors and maintenance cytokines IL-7 and IL-15. We therefore conclude that CXCR4 is not only crucial for entry of CD8+ T cells into the BM, but also controls their subsequent localization toward BM niches that support their survival.
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Affiliation(s)
- Marieke Goedhart
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Stephanie Gessel
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Robbert van der Voort
- Department of Laboratory Medicine, Laboratory of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Edith Slot
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Beth Lucas
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Ellis Gielen
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Mark Hoogenboezem
- Department of Plasma Proteins, Laboratory for Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Timo Rademakers
- Department of Plasma Proteins, Laboratory for Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Sulima Geerman
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Jaap D van Buul
- Department of Plasma Proteins, Laboratory for Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Stephan Huveneers
- Department of Plasma Proteins, Laboratory for Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Harry Dolstra
- Department of Laboratory Medicine, Laboratory of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Graham Anderson
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Carlijn Voermans
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Martijn A Nolte
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Yajima T, Hoshino K, Muranushi R, Mogi A, Onozato R, Yamaki E, Kosaka T, Tanaka S, Shirabe K, Yoshikai Y, Kuwano H. Fas/FasL signaling is critical for the survival of exhausted antigen-specific CD8 + T cells during tumor immune response. Mol Immunol 2019; 107:97-105. [PMID: 30711908 DOI: 10.1016/j.molimm.2019.01.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 12/30/2018] [Accepted: 01/25/2019] [Indexed: 01/22/2023]
Abstract
Antigen (Ag)-specific activated CD8+ T cells are critical for tumor elimination but become exhausted, and thus, dysfunctional during immune response against the tumor due to chronic antigen stimulation. The signaling of immune checkpoint receptors is known to be a critical component in this exhaustion; however, the fate of these exhausted CD8+ T cells remains unclear. Therefore, to elucidate this, we followed the fate of Ag-specific CD8+ T cells by directly visualizing them using MHC class I tetramers coupled with ovoalubumin257-264 in C57BL/6 mice inoculated with EG.7. We found that the number of generated Ag-specific activated CD8+ T cells decreased via apoptosis during a prolonged tumor immune response. However, the number of Ag-specific CD8+ T cells was significantly higher in Fas ligand (FasL)-dysfunctional gld mice than in control mice, resulting in suppressed tumor growth. In contrast, the enforced expression of Bcl-2 failed to rescue apoptosis of the exhausted CD8+ T cells following EG.7 inoculation. These results suggest that Fas/FasL signaling is critical for the survival of exhausted CD8+ T cells during the tumor immune response.
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Affiliation(s)
- Toshiki Yajima
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan.
| | - Kouki Hoshino
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Ryo Muranushi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Akira Mogi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Ryoichi Onozato
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Ei Yamaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Takayuki Kosaka
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Shigebumi Tanaka
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
| | - Yasunobu Yoshikai
- Division of Host Defense, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | - Hiroyuki Kuwano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22, Showa, Maebashi 371-8511, Japan
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Shinde P, Bharat V, Rodriguez-Oquendo A, Zhou B, Vella AT. Understanding how combinatorial targeting of TLRs and TNFR family costimulatory members promote enhanced T cell responses. Expert Opin Biol Ther 2018; 18:1073-1083. [PMID: 30169979 DOI: 10.1080/14712598.2018.1518422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 08/28/2018] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Due to the ability of pathogen-associated molecular patters and tumor necrosis factor receptor (TNFR) family costimulatory agonists to boost T cell responses, studies have combined Toll-like receptor (TLR) ligands with TNFR family costimulatory receptor agonists to induce impressive and long-lasting T cell responses. Although some studies have determined how these combinatorial vaccines promote enhanced T cell responses, much remains unknown about the mechanism used by these combinations to promote synergistic T cell responses - especially in settings of infectious diseases or cancer. AREAS COVERED In this review, we look in detail at the signaling pathways induced by combinatorial targeting of TLR and TNFR family costimulatory members that help them promote synergistic T cell responses. Understanding this can greatly aid the development of novel vaccine regimens that promote cellular immune responses, which is essential for treating certain infectious diseases and cancer. EXPERT OPINION Vaccines against some infectious diseases as well as therapeutic cancer vaccines require cellular immunity. Therefore, we evaluate here how signaling pathways induced by TLR ligand and costimulatory agonist combinations promote enhanced T cell responses during immunization with model antigens, viral pathogens, or tumor antigens. Once pathways that drive these combinatorial vaccines to boost T cell activation are identified, they can be incorporated in vaccines designed to target pathogens or cancer.
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Affiliation(s)
- Paurvi Shinde
- a Bloodworks Northwest Research Institute , Seattle , WA , USA
| | - Vinita Bharat
- b Department of Neurosurgery , Stanford University School of Medicine , Stanford , CA , USA
| | | | - Beiyan Zhou
- d Department of Immunology, UConn School of Medicine , UConn Health , Farmington , CT , USA
| | - Anthony T Vella
- d Department of Immunology, UConn School of Medicine , UConn Health , Farmington , CT , USA
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Controlling IL-7 Injections in HIV-Infected Patients. Bull Math Biol 2018; 80:2349-2377. [PMID: 30073567 DOI: 10.1007/s11538-018-0465-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 07/03/2018] [Indexed: 10/28/2022]
Abstract
Immune interventions consisting in repeated injections are broadly used as they are thought to improve the quantity and the quality of the immune response. However, they also raise several questions that remain unanswered, in particular the number of injections to make or the delay to respect between different injections to achieve this goal. Practical and financial considerations add constraints to these questions, especially in the framework of human studies. We specifically focus here on the use of interleukin-7 (IL-7) injections in HIV-infected patients under antiretroviral treatment, but still unable to restore normal levels of [Formula: see text] T lymphocytes. Clinical trials have already shown that repeated cycles of injections of IL-7 could help maintaining [Formula: see text] T lymphocytes levels over the limit of 500 cells/[Formula: see text]L, by affecting proliferation and survival of [Formula: see text] T cells. We then aim at answering the question: how to maintain a patients level of [Formula: see text] T lymphocytes by using a minimum number of injections (i.e., optimizing the strategy of injections)? Based on mechanistic models that were previously developed for the dynamics of [Formula: see text] T lymphocytes in this context, we model the process by a piecewise deterministic Markov model. We then address the question by using some recently established theory on impulse control problem in order to develop a numerical tool determining the optimal strategy. Results are obtained on a reduced model, as a proof of concept: the method allows to define an optimal strategy for a given patient. This method could be applied to optimize injections schedules in clinical trials.
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Lam JKP, Hui KF, Ning RJ, Xu XQ, Chan KH, Chiang AKS. Emergence of CD4+ and CD8+ Polyfunctional T Cell Responses Against Immunodominant Lytic and Latent EBV Antigens in Children With Primary EBV Infection. Front Microbiol 2018; 9:416. [PMID: 29599759 PMCID: PMC5863510 DOI: 10.3389/fmicb.2018.00416] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 02/21/2018] [Indexed: 11/13/2022] Open
Abstract
Long term carriers were shown to generate robust polyfunctional T cell (PFC) responses against lytic and latent antigens of Epstein-Barr virus (EBV). However, the time of emergence of PFC responses against EBV antigens, pattern of immunodominance and difference between CD4+ and CD8+ T cell responses during various stages of EBV infection are not clearly understood. A longitudinal study was performed to assess the development of antigen-specific PFC responses in children diagnosed to have primary symptomatic (infectious mononucleosis [IM]) and asymptomatic (AS) EBV infection. Evaluation of IFN-γ secreting CD8+ T cell responses upon stimulation by HLA class I-specific peptides of EBV lytic and latent proteins by ELISPOT assay followed by assessment of CD4+ and CD8+ PFC responses upon stimulation by a panel of overlapping EBV peptides for co-expression of IFN-γ, TNF-α, IL-2, perforin and CD107a by flow cytometry were performed. Cytotoxicity of T cells against autologous lymphoblastoid cell lines (LCLs) as well as EBV loads in PBMC and plasma were also determined. Both IM and AS patients had elevated PBMC and plasma viral loads which declined steadily during a 12-month period from the time of diagnosis whilst decrease in the magnitude of CD8+ T cell responses toward EBV lytic peptides in contrast to increase toward latent peptides was shown with no significant difference between those of IM and AS patients. Both lytic and latent antigen-specific CD4+ and CD8+ T cells demonstrated polyfunctionality (defined as greater or equal to three functions) concurrent with enhanced cytotoxicity against autologous LCLs and steady decrease in plasma and PBMC viral loads over time. Immunodominant peptides derived from BZLF1, BRLF1, BMLF1 and EBNA3A-C proteins induced the highest proportion of CD8+ as well as CD4+ PFC responses. Diverse functional subtypes of both CD4+ and CD8+ PFCs were shown to emerge at 6–12 months. In conclusion, EBV antigen-specific CD4+ and CD8+ PFC responses emerge during the first year of primary EBV infection, with greatest responses toward immunodominant epitopes in both lytic and latent proteins, correlating to steady decline in PBMC and plasma viral loads.
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Affiliation(s)
- Janice K P Lam
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
| | - K F Hui
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
| | - Raymond J Ning
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
| | - X Q Xu
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
| | - K H Chan
- Department of Microbiology, Li Ka Shing Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
| | - Alan K S Chiang
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
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Ptáčková P, Musil J, Štach M, Lesný P, Němečková Š, Král V, Fábry M, Otáhal P. A new approach to CAR T-cell gene engineering and cultivation using piggyBac transposon in the presence of IL-4, IL-7 and IL-21. Cytotherapy 2018; 20:507-520. [PMID: 29475789 DOI: 10.1016/j.jcyt.2017.10.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 09/20/2017] [Accepted: 10/06/2017] [Indexed: 10/25/2022]
Abstract
BACKGROUND AIMS Clinical-grade chimeric antigenic receptor (CAR)19 T cells are routinely manufactured by lentiviral/retroviral (LV/RV) transduction of an anti-CD3/CD28 activated T cells, which are then propagated in a culture medium supplemented with interleukin (IL)-2. The use of LV/RVs for T-cell modification represents a manufacturing challenge due to the complexity of the transduction approach and the necessity of thorough quality control. METHODS We present here a significantly improved protocol for CAR19 T-cell manufacture that is based on the electroporation of peripheral blood mononuclear cells with plasmid DNA encoding the piggyBac transposon/transposase vectors and their cultivation in the presence of cytokines IL-4, IL-7 and IL-21. RESULTS We found that activation of the CAR receptor by either its cognate ligand (i.e., CD19 expressed on the surface of B cells) or anti-CAR antibody, followed by cultivation in the presence of cytokines IL-4 and IL-7, enables strong and highly selective expansion of functional CAR19 T cells, resulting in >90% CAR+ T cells. Addition of cytokine IL-21 to the mixture of IL-4 and IL-7 supported development of immature CAR19 T cells with central memory and stem cell memory phenotypes and expressing very low amounts of inhibitory receptors PD-1, LAG-3 and TIM-3. CONCLUSIONS Our protocol provides a simple and cost-effective method for engineering high-quality T cells for adoptive therapies.
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Affiliation(s)
- Pavlína Ptáčková
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Jan Musil
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Martin Štach
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Petr Lesný
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Šárka Němečková
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic
| | - Vlastimil Král
- Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Milan Fábry
- Institute of Molecular Genetics, Czech Academy of Sciences, Prague, Czech Republic
| | - Pavel Otáhal
- Institute of Hematology and Blood Transfusion, Prague, Czech Republic; Department of Hematology, First Faculty of Medicine and General University Hospital, Prague, Czech Republic.
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Neitzke DJ, Bowers JS, Andrijauskaite K, O'Connell NS, Garrett-Mayer E, Wrangle J, Li Z, Paulos CM, Cole DJ, Rubinstein MP. Murine Th17 cells utilize IL-2 receptor gamma chain cytokines but are resistant to cytokine withdrawal-induced apoptosis. Cancer Immunol Immunother 2017; 66:737-751. [PMID: 28280853 DOI: 10.1007/s00262-017-1965-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 01/27/2017] [Indexed: 12/30/2022]
Abstract
Adoptive cellular therapy (ACT) with the Th17 subset of CD4+ T cells can cure established melanoma in preclinical models and holds promise for treating human cancer. However, little is known about the growth factors necessary for optimal engraftment and anti-tumor activity of Th17 cells. Due to the central role of IL-2 receptor gamma chain (IL2Rγ-chain) cytokines (IL-2, IL-7, and IL-15) in the activity and persistence of many T cell subsets after adoptive transfer, we hypothesized that these cytokines are important for Th17 cells. We found that Th17 cells proliferated in response to IL-2, IL-7, and IL-15 in vitro. However, in contrast to many other T cell subsets, including conventionally activated CD8+ T cells, we found that Th17 cells were resistant to apoptosis in the absence of IL2Rγ-chain cytokines. To determine whether Th17 cells utilize IL2Rγ-chain cytokines in vivo, we tracked Th17 cell engraftment after adoptive transfer with or without cytokine depletion. Depletion of IL-7 and/or IL-2 decreased initial engraftment, while depletion of IL-15 did not. Supplementation of IL-2 increased initial Th17 engraftment. To assess the clinical relevance of these findings, we treated melanoma-bearing mice with Th17 cell adoptive transfer and concurrent cytokine depletion or supplementation. We found that simultaneous depletion of IL-2 and IL-7 decreased therapeutic efficacy, depletion of IL-15 had no effect, and IL-2 supplementation increased therapeutic efficacy. Our results show that Th17 cells are responsive to IL2Rγ-chain cytokines, and provide insight into the application of these cytokines for Th17-based therapeutic strategies.
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Affiliation(s)
- Daniel J Neitzke
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Jacob S Bowers
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Kristina Andrijauskaite
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Nathaniel S O'Connell
- Department of Public Health Sciences, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Elizabeth Garrett-Mayer
- Department of Public Health Sciences, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - John Wrangle
- Department of Medicine, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Zihai Li
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Chrystal M Paulos
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - David J Cole
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Mark P Rubinstein
- Departments of Surgery, and Microbiology and Immunology, Medical University of South Carolina, 86 Jonathan Lucas Street, Hollings Cancer Center Room 506, Charleston, SC, 29425, USA.
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MyD88 Shapes Vaccine Immunity by Extrinsically Regulating Survival of CD4+ T Cells during the Contraction Phase. PLoS Pathog 2016; 12:e1005787. [PMID: 27542117 PMCID: PMC4991787 DOI: 10.1371/journal.ppat.1005787] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 07/05/2016] [Indexed: 12/01/2022] Open
Abstract
Soaring rates of systemic fungal infections worldwide underscore the need for vaccine prevention. An understanding of the elements that promote vaccine immunity is essential. We previously reported that Th17 cells are required for vaccine immunity to the systemic dimorphic fungi of North America, and that Card9 and MyD88 signaling are required for the development of protective Th17 cells. Herein, we investigated where, when and how MyD88 regulates T cell development. We uncovered a novel mechanism in which MyD88 extrinsically regulates the survival of activated T cells during the contraction phase and in the absence of inflammation, but is dispensable for the expansion and differentiation of the cells. The poor survival of activated T cells in Myd88-/- mice is linked to increased caspase3-mediated apoptosis, but not to Fas- or Bim-dependent apoptotic pathways, nor to reduced expression of the anti-apoptotic molecules Bcl-2 or Bcl-xL. Moreover, TLR3, 7, and/or 9, but not TLR2 or 4, also were required extrinsically for MyD88-dependent Th17 cell responses and vaccine immunity. Similar MyD88 requirements governed the survival of virus primed T cells. Our data identify unappreciated new requirements for eliciting adaptive immunity and have implications for designing vaccines. Despite several million new systemic fungal infections annually worldwide, there are no commercial vaccines available. The development of effective vaccines requires a fundamental understanding of how protective immune responses are induced. Using experimental vaccine strains, we previously demonstrated that populations of T helper cells producing interleukin 17 (Th17 cells) and interferon gamma (Th1 cells) mediate vaccine resistance to systemic dimorphic fungi of North America. Here, we report how the immune system recognizes the fungal vaccines and induces the development of protective T cells. We delineate the role of pathogen recognition receptors (PRRs) and their common signaling pathway in host immune cells that recognize the fungal vaccine. While the signaling pathway studied is essential for the development of vaccine-induced T cells, the mechanism of action is novel and included T cell death after activation. The findings could be extended to virus-specific T cells suggesting that the mechanism is conserved among the microbial kingdom. Our work sheds new light on how protective T cells are induced and can be harnessed by vaccine strategies tailored against fungal and other microbial infections.
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Marcel N, Sarin A. Notch1 regulated autophagy controls survival and suppressor activity of activated murine T-regulatory cells. eLife 2016; 5. [PMID: 27267497 PMCID: PMC4894756 DOI: 10.7554/elife.14023] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 05/09/2016] [Indexed: 12/22/2022] Open
Abstract
Cell survival is one of several processes regulated by the Notch pathway in mammalian cells. Here we report functional outcomes of non-nuclear Notch signaling to activate autophagy, a conserved cellular response to nutrient stress, regulating survival in murine natural T-regulatory cells (Tregs), an immune subset controlling tolerance and inflammation. Induction of autophagy required ligand-dependent, Notch intracellular domain (NIC) activity, which controlled mitochondrial organization and survival of activated Tregs. Consistently, NIC immune-precipitated Beclin and Atg14, constituents of the autophagy initiation complex. Further, ectopic expression of an effector of autophagy (Atg3) or recombinant NIC tagged to a nuclear export signal (NIC-NES), restored autophagy and suppressor function in Notch1(-/-) Tregs. Furthermore, Notch1 deficiency in the Treg lineage resulted in immune hyperactivity, implicating Notch activity in Treg homeostasis. Notch1 integration with autophagy, revealed in these experiments, holds implications for Notch regulated cell-fate decisions governing differentiation.
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Affiliation(s)
- Nimi Marcel
- National Centre for Biological Sciences, Bengaluru, India.,Department of Biology, Manipal University, Manipal, India
| | - Apurva Sarin
- National Centre for Biological Sciences, Bengaluru, India.,Institute for Stem Cell Biology & Regenerative Medicine, Bengaluru, India
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Meya DB, Manabe YC, Boulware DR, Janoff EN. The immunopathogenesis of cryptococcal immune reconstitution inflammatory syndrome: understanding a conundrum. Curr Opin Infect Dis 2016; 29:10-22. [PMID: 26658650 PMCID: PMC4689618 DOI: 10.1097/qco.0000000000000224] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE OF REVIEW Cryptococcal meningitis causes significant mortality among HIV-infected patients, despite antifungal therapy and use of antiretroviral therapy (ART). In patients with cryptococcal meningitis, ART is often complicated by immune reconstitution inflammatory syndrome (IRIS), manifesting as unmasking of previously unrecognized subclinical infection (unmasking CM-IRIS) or paradoxical worsening of symptoms in the central nervous system after prior improvement with antifungal therapy (paradoxical CM-IRIS). We review our current understanding of the pathogenesis of this phenomenon, focusing on unifying innate and adaptive immune mechanisms leading to the development of this often fatal syndrome. RECENT FINDINGS We propose that HIV-associated CD4 T-cell depletion, chemokine-driven trafficking of monocytes into cerebrospinal fluid in response to cryptococcal meningitis, and poor localized innate cytokine responses lead to inadequate cryptococcal killing and clearance of the fungus. Subsequent ART-associated recovery of T-cell signaling and restored cytokine responses, characterized by IFN-γ production, triggers an inflammatory response. The inflammatory response triggered by ART is dysregulated because of impaired homeostatic and regulatory mechanisms, culminating in the development of CM-IRIS. SUMMARY Despite our incomplete understanding of the immunopathogenesis of CM-IRIS, emerging data exploring innate and adaptive immune responses could be exploited to predict, prevent and manage CM-IRIS and associated morbid consequences.
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Affiliation(s)
- David B Meya
- Infectious Disease Institute, Makerere University, Uganda
- Dept of Medicine, Center for Infectious Diseases and Microbiology Translational Research, University of Minnesota, USA
- School of Medicine, College of Health Sciences, Makerere University
| | - Yukari C Manabe
- Division of Infectious Diseases, Department of Medicine, Johns Hopkins University, Baltimore, MD
| | - David R Boulware
- Dept of Medicine, Center for Infectious Diseases and Microbiology Translational Research, University of Minnesota, USA
| | - Edward N Janoff
- Mucosal and Vaccine Research Program Colorado (MAVRC), University of Colorado Denver, Aurora, Colorado, USA; Denver Veterans Affairs Medical Center, Denver, CO
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Regulation of Asymmetric Division by Atypical Protein Kinase C Influences Early Specification of CD8(+) T Lymphocyte Fates. Sci Rep 2016; 6:19182. [PMID: 26765121 PMCID: PMC4725917 DOI: 10.1038/srep19182] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 12/07/2015] [Indexed: 02/06/2023] Open
Abstract
Naïve CD8(+) T lymphocytes responding to microbial pathogens give rise to effector T cells that provide acute defense and memory T cells that provide long-lived immunity. Upon activation, CD8(+) T lymphocytes can undergo asymmetric division, unequally distributing factors to the nascent daughter cells that influence their eventual fate towards the effector or memory lineages. Individual loss of either atypical protein kinase C (aPKC) isoform, PKCζ or PKCλ/ι, partially impairs asymmetric divisions and increases CD8(+) T lymphocyte differentiation toward a long-lived effector fate at the expense of memory T cell formation. Here, we show that deletion of both aPKC isoforms resulted in a deficit in asymmetric divisions, increasing the proportion of daughter cells that inherit high amounts of effector fate-associated molecules, IL-2Rα, T-bet, IFNγR, and interferon regulatory factor 4 (IRF4). However, unlike CD8(+) T cells deficient in only one aPKC isoform, complete loss of aPKC unexpectedly increased CD8(+) T cell differentiation toward a short-lived, terminal effector fate, as evidenced by increased rates of apoptosis and decreased expression of Eomes and Bcl2 early during the immune response. Together, these results provide evidence for an important role for asymmetric division in CD8(+) T lymphocyte fate specification by regulating the balance between effector and memory precursors at the initiation of the adaptive immune response.
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Bortell N, Morsey B, Basova L, Fox HS, Marcondes MCG. Phenotypic changes in the brain of SIV-infected macaques exposed to methamphetamine parallel macrophage activation patterns induced by the common gamma-chain cytokine system. Front Microbiol 2015; 6:900. [PMID: 26441851 PMCID: PMC4568411 DOI: 10.3389/fmicb.2015.00900] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 08/17/2015] [Indexed: 12/12/2022] Open
Abstract
One factor in the development of neuroAIDS is the increase in the migration of pro-inflammatory CD8 T cells across the blood–brain barrier. Typically these cells are involved with keeping the viral load down. However, the persistence of above average numbers of CD8 T cells in the brain, not necessarily specific to viral peptides, is facilitated by the upregulation of IL15 from astrocytes, in the absence of IL2, in the brain environment. Both IL15 and IL2 are common gamma chain (γc) cytokines. Here, using the non-human primate model of neuroAIDS, we have demonstrated that exposure to methamphetamine, a powerful illicit drug that has been associated with HIV exposure and neuroAIDS severity, can cause an increase in molecules of the γc system. Among these molecules, IL15, which is upregulated in astrocytes by methamphetamine, and that induces the proliferation of T cells, may also be involved in driving an inflammatory phenotype in innate immune cells of the brain. Therefore, methamphetamine and IL15 may be critical in the development and aggravation of central nervous system immune-mediated inflammatory pathology in HIV-infected drug abusers.
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Affiliation(s)
- Nikki Bortell
- Department of Molecular and Cellular Neurosciences, The Scripps Research Institute La Jolla, CA, USA
| | - Brenda Morsey
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center Omaha, NE, USA
| | - Liana Basova
- Department of Molecular and Cellular Neurosciences, The Scripps Research Institute La Jolla, CA, USA
| | - Howard S Fox
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center Omaha, NE, USA
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Lorenzi T, Chisholm RH, Melensi M, Lorz A, Delitala M. Mathematical model reveals how regulating the three phases of T-cell response could counteract immune evasion. Immunology 2015; 146:271-80. [PMID: 26119966 DOI: 10.1111/imm.12500] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/21/2015] [Accepted: 06/22/2015] [Indexed: 02/01/2023] Open
Abstract
T cells are key players in immune action against the invasion of target cells expressing non-self antigens. During an immune response, antigen-specific T cells dynamically sculpt the antigenic distribution of target cells, and target cells concurrently shape the host's repertoire of antigen-specific T cells. The succession of these reciprocal selective sweeps can result in 'chase-and-escape' dynamics and lead to immune evasion. It has been proposed that immune evasion can be countered by immunotherapy strategies aimed at regulating the three phases of the immune response orchestrated by antigen-specific T cells: expansion, contraction and memory. Here, we test this hypothesis with a mathematical model that considers the immune response as a selection contest between T cells and target cells. The outcomes of our model suggest that shortening the duration of the contraction phase and stabilizing as many T cells as possible inside the long-lived memory reservoir, using dual immunotherapies based on the cytokines interleukin-7 and/or interleukin-15 in combination with molecular factors that can keep the immunomodulatory action of these interleukins under control, should be an important focus of future immunotherapy research.
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Affiliation(s)
- Tommaso Lorenzi
- Centre de Mathématiques et de Leurs Applications, ENS Cachan, CNRS, Cachan Cedex, France
| | - Rebecca H Chisholm
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Matteo Melensi
- Department of Health Sciences, A. Avogadro Università del Piemonte Orientale, Novara, Italy
| | - Alexander Lorz
- MAMBA Team, INRIA-Paris-Rocquencourt, Le Chesnay Cedex, France.,Laboratoire Jacques-Louis Lions, Sorbonne Universités, UPMC Univ Paris 06, UMR 7598, Paris, France.,Laboratoire Jacques-Louis Lions, CNRS, UMR 7598, Paris, France
| | - Marcello Delitala
- Department of Mathematical Sciences, Politecnico di Torino, Torino, Italy
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Liu Y, Lai Y, Li H, Liu J, Luo XY, Li MH, Yang T, Wang YT, Yang SX, Li LM, Zou Q, Chen ZL. A novel water-soluble benzothiazole derivative BD926 inhibits human activated T cell proliferation by down-regulating the STAT5 activation. Eur J Pharmacol 2015; 761:36-43. [PMID: 25935419 DOI: 10.1016/j.ejphar.2015.04.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 03/28/2015] [Accepted: 04/06/2015] [Indexed: 02/08/2023]
Abstract
Immunosuppressants are widely used for treatment of T cell-mediated autoimmune diseases and allogeneic graft rejection. However, because of the toxicity and tolerance of these drugs, novel immunosuppressants are urgently needed. We synthesized a series of novel water-soluble benzothiazole derivatives and found that BD926 [sodium 2-(benzo[d]thiazol-2-yl)-4,5,6,7-tetrahydro-2H-indazol-3-olate] had potent immunosuppressive activity. Treatment with BD926 significantly inhibited anti-CD3/anti-CD28 and alloantigen-induced human T cell proliferation as well as IL2-stimulated activated T cell proliferation in a dose-dependent manner in vitro. BD926 had no obvious cytotoxicity against human resting T cells, IL-4 treated activated T cells and fibroblast-like synoviocytes in our experimental conditions. Furthermore, BD926 induced cell cycle arrest at G0/G1 phase and inhibited the cyclin D3 and CDK 6 expression in activated T cells. BD926 inhibited the STAT5, but not Akt and p70S6K, phosphorylation in a dose-dependent manner in the IL-2-treated activated T cells. Interestingly, BD926 inhibited IFN-γ, IL-6 and IL-17, but not IL-2, IL-4 and IL-10, production in activated T cells. Finally, treatment with BD926 reduced delayed-type hypersensitivity in mice in a dose-dependent manner. Collectively, these data suggest that BD926 may be a lead compound for the design and development of new immunosuppressants for the intervention of allograft rejection and autoimmune diseases.
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Affiliation(s)
- Yang Liu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, People׳s Republic of China; Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China; Development and Regeneration Key Laboratory of Sichuan Province, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Yi Lai
- School of laboratory medicine, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Hua Li
- Cancer center, Chengdu Military General Hospital, Chengdu, Sichuan, People׳s Republic of China.
| | - Jin Liu
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Xing-Yan Luo
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Min-Hui Li
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Tai Yang
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Yan-Tang Wang
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Shu-Xia Yang
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Li-Mei Li
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Qiang Zou
- Department of Immunology, School of Basic Medical Sciences, Chengdu Medical College, Chengdu, Sichuan, People׳s Republic of China.
| | - Zheng-Liang Chen
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, People׳s Republic of China.
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Abstract
Serious viral infections are a common cause of morbidity and mortality after allogeneic stem cell transplantation. They occur in the majority of allograft recipients and are fatal in 17–20%. These severe infections may be prolonged or recurrent and add substantially to the cost, both human and financial, of the procedure. Many features of allogeneic stem cell transplantation contribute to this high rate of viral disease. The cytotoxic and immunosuppressive drugs administered pretransplant to eliminate the host hematopoietic/immune system and any associated malignancy, the delay in recapitulating immune ontogeny post‐transplant, the immunosuppressive drugs given to prevent graft versus host disease (GvHD), and the effects of GvHD itself, all serve to make stem cell transplant recipients vulnerable to disease from endogenous (latent) and exogenous (community) viruses, and to be incapable of controlling them as quickly and effectively as most normal individuals.
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Affiliation(s)
- Ann M Leen
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston Methodist Hospital and Texas Children's Hospital, Houston, TX, USA
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Siddiqui WA, Ahad A, Ahsan H. The mystery of BCL2 family: Bcl-2 proteins and apoptosis: an update. Arch Toxicol 2015; 89:289-317. [PMID: 25618543 DOI: 10.1007/s00204-014-1448-7] [Citation(s) in RCA: 477] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/23/2014] [Indexed: 01/12/2023]
Abstract
Apoptosis is a critically important biological process that plays an essential role in cell fate and homeostasis. An important component of the apoptotic pathway is the family of proteins commonly known as the B cell lymphoma-2 (Bcl-2). The primary role of Bcl-2 family members is the regulation of apoptosis. Although the structure of Bcl-2 family of proteins was reported nearly 10 years ago, however, it still surprises us with its structural and functional complexity and diversity. A number of studies have demonstrated that Bcl-2 family influences many other cellular processes beyond apoptosis which are generally independent of the regulation of apoptosis, suggesting additional roles for Bcl-2. The disruption of the regulation of apoptosis is a causative event in many diseases. Since the Bcl-2 family of proteins is the key regulator of apoptosis, the abnormalities in its function have been implicated in many diseases including cancer, neurodegenerative disorders, ischemia and autoimmune diseases. In the past few years, our understanding of the mechanism of action of Bcl-2 family of proteins and its implications in various pathological conditions has enhanced significantly. The focus of this review is to summarize the current knowledge on the structure and function of Bcl-2 family of proteins in apoptotic cellular processes. A number of drugs have been developed in the past few years that target different Bcl-2 members. The role of Bcl-2 proteins in the pathogenesis of various diseases and their pharmacological significance as effective molecular therapeutic targets is also discussed.
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Affiliation(s)
- Waseem Ahmad Siddiqui
- Department of Biochemistry, Faculty of Science, Jamia Hamdard (Hamdard University), New Delhi, 110062, India
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Sharma R, Tiku AB. Emodin inhibits splenocyte proliferation and inflammation by modulating cytokine responses in a mouse model system. J Immunotoxicol 2015; 13:20-6. [PMID: 25565015 DOI: 10.3109/1547691x.2014.995243] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Emodin, an anthraquinone derivative, was investigated for potential anti-inflammatory and anti-proliferative effects in vitro. The potential to induce these outcomes was assessed using concanavalin A (ConA)-stimulated mouse splenocytes. Dose-response studies showed that emodin at 100 µM was not cytotoxic to naive cells, and that the same dose caused proliferation to be significantly reduced in ConA-stimulated cells. In addition, emodin significantly reduced ConA-induced nitric oxide (NO) production and the formation/release of TH1 (IL-2, IFNγ, TNFα) and TH17 (IL-6 and IL-17) cell cytokines, but induced those of TH2 (IL-4) and Treg (IL-10) cells. From the results, it is concluded that earlier-reported immunomodulatory effects imparted by emodin may have been attributable, in part, to anti-proliferative effects on lymphocytes, as well as a shift within the TH1/TH2 and TH17/Treg balance (towards TH2 and Treg). These findings, while providing evidence of mechanisms of emodin immunomodulation, are also potentially important for sparking studies that ultimately may result in the potential use of this agent in preventive and/or corrective strategies against autoimmune and other inflammatory diseases.
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Affiliation(s)
- Rahul Sharma
- a School of Life Sciences, Jawaharlal Nehru University , New Delhi , India
| | - Ashu Bhan Tiku
- a School of Life Sciences, Jawaharlal Nehru University , New Delhi , India
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Suppression of Foxo1 activity and down-modulation of CD62L (L-selectin) in HIV-1 infected resting CD4 T cells. PLoS One 2014; 9:e110719. [PMID: 25330112 PMCID: PMC4199762 DOI: 10.1371/journal.pone.0110719] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 09/16/2014] [Indexed: 01/10/2023] Open
Abstract
HIV-1 hijacks and disrupts many processes in the cells it infects in order to suppress antiviral immunity and to facilitate its replication. Resting CD4 T cells are important early targets of HIV-1 infection in which HIV-1 must overcome intrinsic barriers to viral replication. Although resting CD4 T cells are refractory to infection in vitro, local environmental factors within lymphoid and mucosal tissues such as cytokines facilitate viral replication while maintaining the resting state. These factors can be utilized in vitro to study HIV-1 replication in resting CD4 T cells. In vivo, the migration of resting naïve and central memory T cells into lymphoid tissues is dependent upon expression of CD62L (L-selectin), a receptor that is subsequently down-modulated following T cell activation. CD62L gene transcription is maintained in resting T cells by Foxo1 and KLF2, transcription factors that maintain T cell quiescence and which regulate additional cellular processes including survival, migration, and differentiation. Here we report that HIV-1 down-modulates CD62L in productively infected naïve and memory resting CD4 T cells while suppressing Foxo1 activity and the expression of KLF2 mRNA. Partial T cell activation was further evident as an increase in CD69 expression. Several other Foxo1- and KLF2-regulated mRNA were increased or decreased in productively infected CD4 T cells, including IL-7rα, Myc, CCR5, Fam65b, S1P1 (EDG1), CD52, Cyclin D2 and p21CIP1, indicating a profound reprogramming of these cells. The Foxo1 inhibitor AS1842856 accelerated de novo viral gene expression and the sequella of infection, supporting the notion that HIV-1 suppression of Foxo1 activity may be a strategy to promote replication in resting CD4 T cells. As Foxo1 is an investigative cancer therapy target, the development of Foxo1 interventions may assist the quest to specifically suppress or activate HIV-1 replication in vivo.
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Berglund S, Gertow J, Uhlin M, Mattsson J. Expanded umbilical cord blood T cells used as donor lymphocyte infusions after umbilical cord blood transplantation. Cytotherapy 2014; 16:1528-1536. [PMID: 25231890 DOI: 10.1016/j.jcyt.2014.08.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 08/06/2014] [Accepted: 08/09/2014] [Indexed: 01/15/2023]
Abstract
BACKGROUND Umbilical cord blood (UCB) is an alternative graft source for hematopoietic stem cell transplantation and has been shown to give results comparable to transplantation with other stem cell sources. Donor lymphocyte infusion (DLI) is an effective treatment for relapsed malignancies after hematopoietic stem cell transplantation. However, DLI is not available after UCB transplantation. METHODS In this study, in vitro-cultured T cells from the UCB graft were explored as an alternative to conventional DLI. The main aim was to study the safety of the cultured UCB T cells used as DLI because such cell preparations have not been used in this context previously. We also assessed potential benefits of the treatment. RESULTS The cultured UCB T cells (UCB DLI) were given to 4 patients with mixed chimerism (n = 2), minimal residual disease (n = 1) and graft failure (n = 1). No adverse reactions were seen at transfusion. Three of the patients did not show any signs of graft-versus-host disease (GVHD) after UCB DLI, but GVHD could not be excluded in the last patient. In the patient with minimal residual disease treated with UCB DLI, the malignant cell clone was detectable shortly before infusion but undetectable at treatment and for 3 months after infusion. In 1 patient with mixed chimerism, the percentage of recipient cells decreased in temporal association with UCB DLI treatment. CONCLUSIONS We saw no certain adverse effects of treatment with UCB DLI. Events that could indicate possible benefits were seen but with no certain causal association with the treatment.
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Affiliation(s)
- Sofia Berglund
- Center for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden; Department of Laboratory Medicine, Division of Therapeutic Immunology, Karolinska Institutet, Stockholm, Sweden.
| | - Jens Gertow
- Department of Laboratory Medicine, Division of Therapeutic Immunology, Karolinska Institutet, Stockholm, Sweden
| | - Michael Uhlin
- Center for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden; Department of Laboratory Medicine, Division of Therapeutic Immunology, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Mattsson
- Center for Allogeneic Stem Cell Transplantation, Karolinska University Hospital, Stockholm, Sweden; Department of Laboratory Medicine, Division of Therapeutic Immunology, Karolinska Institutet, Stockholm, Sweden
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Loss of the death receptor CD95 (Fas) expression by dendritic cells protects from a chronic viral infection. Proc Natl Acad Sci U S A 2014; 111:8559-64. [PMID: 24912151 DOI: 10.1073/pnas.1401750111] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Chronic viral infections incapacitate adaptive immune responses by "exhausting" virus-specific T cells, inducing their deletion and reducing productive T-cell memory. Viral infection rapidly induces death receptor CD95 (Fas) expression by dendritic cells (DCs), making them susceptible to elimination by the immune response. Lymphocytic choriomeningitis virus (LCMV) clone 13, which normally establishes a chronic infection, is rapidly cleared in C57Black6/J mice with conditional deletion of Fas in DCs. The immune response to LCMV is characterized by an extended survival of virus-specific effector T cells. Moreover, transfer of Fas-negative DCs from noninfected mice to preinfected animals results in either complete clearance of the virus or a significant reduction of viral titers. Thus, DC-specific Fas expression plays a role in regulation of antiviral responses and suggests a strategy for stimulation of T cells in chronically infected animals and humans to achieve the clearance of persistent viruses.
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