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Wei D, Horton KL, Chen J, Dong L, Chen S, Abdul-Hadi K, Zhang TT, Casson CN, Shaw M, Shiraishi T, Wilkinson B, Ji C, Qian MG. Development of a Highly Sensitive Hybrid LC/MS Assay for the Quantitative Measurement of CTLA-4 in Human T Cells. Molecules 2023; 28:molecules28083311. [PMID: 37110545 PMCID: PMC10142971 DOI: 10.3390/molecules28083311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/30/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) is a check point protein expressed on the surface of T cells and plays a central role in regulating the immune response. In recent years, CTLA-4 has become a popular target for cancer immunotherapy in which blocking CTLA-4 can restore T-cell function and enhance the immune response against cancer. Currently, there are many CTLA-4 inhibitors in a variety of modalities, including cell therapies, which are being developed in both preclinical and clinical stages to further harness the potential of the target for the treatment of certain types of cancer. In drug discovery research, measuring the level of CTLA-4 in T cells is important for drug discovery and development because it provides key information for quantitative assessment of the pharmacodynamics, efficacy, and safety of the CTLA-4-based therapies. However, to our best knowledge, there is still no report of a sensitive, specific, accurate, and reliable assay for CTLA-4 measurement. In this work, an LC/MS-based method was developed to measure CTLA-4 in human T cells. The assay demonstrated high specificity with an LLOQ of 5 copies of CTLA-4 per cell when using 2.5 million T cells for analysis. As shown in the work, the assay was successfully used to measure CTLA-4 levels in subtype T-cell samples from individual healthy subjects. The assay could be applied in supporting the studies of CTLA-4-based cancer therapies.
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Affiliation(s)
- Dong Wei
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Kristin L Horton
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - John Chen
- NovaBioAssays LLC, 52 Dragon Ct, Suite 3B, Woburn, MA 01801, USA
| | - Linlin Dong
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Susan Chen
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Kojo Abdul-Hadi
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Ting Ting Zhang
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Cierra N Casson
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Michael Shaw
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Tsubasa Shiraishi
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Brandon Wilkinson
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
| | - Chengjie Ji
- NovaBioAssays LLC, 52 Dragon Ct, Suite 3B, Woburn, MA 01801, USA
| | - Mark G Qian
- Takeda Pharmaceutical Company International Co., 35 Landsdowne Street, Cambridge, MA 02139, USA
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Samiei A, Gjertson DW, Memarzadeh S, Konecny GE, Moatamed NA. Expression of immune checkpoint regulators, programmed death-ligand 1 (PD-L1/PD-1), cytotoxic T lymphocyte antigen 4 (CTLA-4), and indolaimine-2, 3-deoxygenase (IDO) in uterine mesenchymal tumors. Diagn Pathol 2022; 17:70. [PMID: 36104728 PMCID: PMC9476344 DOI: 10.1186/s13000-022-01251-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 08/31/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Immune checkpoints including programmed death-ligand 1/programmed death-1/ (PD-L1/PD-1), cytotoxic T lymphocyte antigen 4 (CTLA-4), and indolaimine-2, 3-deoxygenase (IDO) have recently emerged as effective candidates for treatment against a range of human malignancies. We have investigated their expression in the uterine mesenchymal tumors. METHODS Sixty-eight mesenchymal tumors were categorized into 6 diagnostic groups. We assessed PD-L1, PD-1, CTLA-4, and IDO expression on paraffin embedded tissue blocks of the uterine tumors using the respective antibodies. Immunohistochemical (IHC) stains were classified as positive when the reactions were present in at least 1% of the cell membranes for PD-L1/PD-1 or in cytoplasm for CTLA-4 and IDO, regardless of intensity. Student's t-test and McNemar's chi-square tests were carried out to analyze the results. RESULTS The mesenchymal neoplasms had expressed the immune checkpoints in the tumor and/or the lymphoid cells at the rate of 49% and 54% respectively. The tumor cells were positive in 10 (18%, PD-L1), 0 (0%, PD-1), 18 (32%, CTLA-4), and 13 (23%, IDO) cases while the infiltrating lymphoid cells were positive in 10 (18%, PD-L1), 23 (40%, PD-1), 18 (32%, CTLA-4), and 13 (23%, IDO) cases. Overall, comparison of paired tumor vs lymphoid cells resulted in p-values of ≤ 0.04. CONCLUSIONS Nearly 50% of the uterine tumors express at least one of the immune checkpoints in tumor and/or the infiltrating lymphoid cells. However, expression of the proteins in the two cellular components are mutually exclusive. Namely, when tumor cells express an immune checkpoint, the infiltrating lymphoid cells do not, and vice versa. Since the leiomyosarcomas are reportedly resistant to the immunotherapy when PD-L1 is expressed in the tumor cells, it can be posited that presence of the IHC positive lymphoid cells may be a better indicator of response to the treatment.
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Affiliation(s)
- Alireza Samiei
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Avenue, 13-145 CHS, BOX 951732, Los Angeles, CA, 90095-1732, USA
| | - David W Gjertson
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Avenue, 13-145 CHS, BOX 951732, Los Angeles, CA, 90095-1732, USA
- Department of Biostatistics, Fielding School of Public Health at UCLA, Los Angeles, CA, USA
| | - Sanaz Memarzadeh
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
- UCLA Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, CA, USA
- Johnson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA, USA
- Molecular Biology Institute, University of California Los Angeles, Los Angeles, CA, USA
- VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA
| | - Gottfried E Konecny
- Department of Hematology-Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Neda A Moatamed
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, 10833 Le Conte Avenue, 13-145 CHS, BOX 951732, Los Angeles, CA, 90095-1732, USA.
- Johnson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA, USA.
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3
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Voss MH, Azad AA, Hansen AR, Gray JE, Welsh SJ, Song X, Kuziora M, Meinecke L, Blando J, Achour I, Wang Y, Walcott FL, Oosting SF. A Randomized Phase II Study of MEDI0680 in Combination with Durvalumab versus Nivolumab Monotherapy in Patients with Advanced or Metastatic Clear-cell Renal Cell Carcinoma. Clin Cancer Res 2022; 28:3032-3041. [PMID: 35507017 PMCID: PMC9365340 DOI: 10.1158/1078-0432.ccr-21-4115] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/01/2022] [Accepted: 04/29/2022] [Indexed: 01/07/2023]
Abstract
PURPOSE MEDI0680 is a humanized anti-programmed cell death-1 (PD-1) antibody, and durvalumab is an anti-PD-L1 antibody. Combining treatment using these antibodies may improve efficacy versus blockade of PD-1 alone. This phase II study evaluated antitumor activity and safety of MEDI0680 plus durvalumab versus nivolumab monotherapy in immunotherapy-naïve patients with advanced clear-cell renal cell carcinoma who received at least one prior line of antiangiogenic therapy. PATIENTS AND METHODS Patients received either MEDI0680 (20 mg/kg) with durvalumab (750 mg) or nivolumab (240 mg), all intravenous, every 2 weeks. The primary endpoint was investigator-assessed objective response rate (ORR). Secondary endpoints included best overall response, progression-free survival (PFS), safety, overall survival (OS), and immunogenicity. Exploratory endpoints included changes in circulating tumor DNA (ctDNA), baseline tumor mutational burden, and tumor-infiltrated immune cell profiles. RESULTS Sixty-three patients were randomized (combination, n = 42; nivolumab, n = 21). ORR was 16.7% [7/42; 95% confidence interval (CI), 7.0-31.4] with combination treatment and 23.8% (5/21; 95% CI, 8.2-47.2) with nivolumab. Median PFS was 3.6 months in both arms; median OS was not reached in either arm. Because of adverse events, 23.8% of patients discontinued MEDI0680 and durvalumab and 14.3% of patients discontinued nivolumab. In the combination arm, reduction in ctDNA fraction was associated with longer PFS. ctDNA mutational analysis did not demonstrate an association with response in either arm. Tumor-infiltrated immune profiles showed an association between immune cell activation and response in the combination arm. CONCLUSIONS MEDI0680 combined with durvalumab was safe and tolerable; however, it did not improve efficacy versus nivolumab monotherapy.
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Affiliation(s)
- Martin H Voss
- Memorial Sloan Kettering Cancer Center, New York, New York
| | | | | | | | - Sarah J Welsh
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Xuyang Song
- Clinical Pharmacology & Quantitative Pharmacology, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland
| | - Michael Kuziora
- Translational Medicine, Oncology R&D, AstraZeneca, Gaithersburg, Maryland
| | - Lina Meinecke
- Translational Medicine, Oncology R&D, AstraZeneca, Gaithersburg, Maryland
| | - Jorge Blando
- Translational Medicine, Oncology R&D, AstraZeneca, Gaithersburg, Maryland
| | - Ikbel Achour
- Translational Medicine, Oncology R&D, AstraZeneca, Gaithersburg, Maryland
| | - Yi Wang
- Early Oncology Biometrics, Oncology R&D, AstraZeneca, Gaithersburg, Maryland
| | | | - Sjoukje F Oosting
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Li J, Smalley I, Chen Z, Wu JY, Phadke MS, Teer JK, Nguyen T, Karreth FA, Koomen JM, Sarnaik AA, Zager JS, Khushalani NI, Tarhini AA, Sondak VK, Rodriguez PC, Messina JL, Chen YA, Smalley KSM. Single-cell Characterization of the Cellular Landscape of Acral Melanoma Identifies Novel Targets for Immunotherapy. Clin Cancer Res 2022; 28:2131-2146. [PMID: 35247927 PMCID: PMC9106889 DOI: 10.1158/1078-0432.ccr-21-3145] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 12/10/2021] [Accepted: 03/01/2022] [Indexed: 12/21/2022]
Abstract
PURPOSE Acral melanoma is a rare subtype of melanoma that arises on the non-hair-bearing skin of the palms, soles, and nail beds. In this study, we used single-cell RNA sequencing (scRNA-seq) to map the transcriptional landscape of acral melanoma and identify novel immunotherapeutic targets. EXPERIMENTAL DESIGN We performed scRNA-seq on nine clinical specimens (five primary, four metastases) of acral melanoma. Detailed cell type curation was performed, the immune landscapes were mapped, and key results were validated by analysis of The Cancer Genome Atlas (TCGA) and single-cell datasets. Cell-cell interactions were inferred and compared with those in nonacral cutaneous melanoma. RESULTS Multiple phenotypic subsets of T cells, natural killer (NK) cells, B cells, macrophages, and dendritic cells with varying levels of activation/exhaustion were identified. A comparison between primary and metastatic acral melanoma identified gene signatures associated with changes in immune responses and metabolism. Acral melanoma was characterized by a lower overall immune infiltrate, fewer effector CD8 T cells and NK cells, and a near-complete absence of γδ T cells compared with nonacral cutaneous melanomas. Immune cells associated with acral melanoma exhibited expression of multiple checkpoints including PD-1, LAG-3, CTLA-4, V-domain immunoglobin suppressor of T cell activation (VISTA), TIGIT, and the Adenosine A2A receptor (ADORA2). VISTA was expressed in 58.3% of myeloid cells and TIGIT was expressed in 22.3% of T/NK cells. CONCLUSIONS Acral melanoma has a suppressed immune environment compared with that of cutaneous melanoma from nonacral skin. Expression of multiple, therapeutically tractable immune checkpoints were observed, offering new options for clinical translation.
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Affiliation(s)
- Jiannong Li
- The Department of Biostatistics and Bioinformatics, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Inna Smalley
- The Department of Tumor Biology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Zhihua Chen
- The Department of Biostatistics and Bioinformatics, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Jheng-Yu Wu
- The Department of Tumor Biology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Manali S. Phadke
- The Department of Tumor Biology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Jamie K. Teer
- The Department of Biostatistics and Bioinformatics, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Thanh Nguyen
- The Department of Biostatistics and Bioinformatics, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Florian A. Karreth
- The Department of Molecular Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - John M. Koomen
- The Department of Molecular Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Amod A. Sarnaik
- The Department of Cutaneous Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Jonathan S. Zager
- The Department of Cutaneous Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Nikhil I. Khushalani
- The Department of Cutaneous Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Ahmad A. Tarhini
- The Department of Cutaneous Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Vernon K. Sondak
- The Department of Cutaneous Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Paulo C. Rodriguez
- The Department of Immunology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Jane L. Messina
- The Department of Immunology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Y. Ann Chen
- The Department of Biostatistics and Bioinformatics, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
| | - Keiran S. M. Smalley
- The Department of Tumor Biology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
- The Department of Cutaneous Oncology, The Moffitt Cancer Center & Research Institute, 12902 Magnolia Drive, Tampa, FL, USA
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5
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Graziani G, Lisi L, Tentori L, Navarra P. Monoclonal Antibodies to CTLA-4 with Focus on Ipilimumab. EXPERIENTIA SUPPLEMENTUM (2012) 2022; 113:295-350. [PMID: 35165868 DOI: 10.1007/978-3-030-91311-3_10] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The immune checkpoint cytotoxic T lymphocyte-associated antigen 4 (CTLA-4 or CD152) is a negative regulator of T-cell-mediated immune responses which plays a critical role in suppressing autoimmunity and maintaining immune homeostasis. Because of its inhibitory activity on T cells, CTLA-4 has been investigated as a drug target to induce immunostimulation, blocking the interaction with its ligands. The antitumor effects mediated by CTLA-4 blockade have been attributed to a sustained active immune response against cancer cells, due to the release of a brake on T cell activation. Ipilimumab (Yervoy, Bristol-Myers Squibb) is a fully human anti-CTLA-4 IgG1κ monoclonal antibody (mAb) that represents the first immune checkpoint inhibitor approved as monotherapy by FDA and EMA in 2011 for the treatment of unresectable/metastatic melanoma. In 2015, FDA also granted approval to ipilimumab monotherapy as adjuvant treatment of stage III melanoma to reduce the risk of tumour recurrence. The subsequent approved indications of ipilimumab for metastatic melanoma, regardless of BRAF mutational status, and other advanced/metastatic solid tumours always involve its use in association with the anti-programmed cell death protein 1 (PD-1) mAb nivolumab. Currently, ipilimumab is evaluated in ongoing clinical trials for refractory/advanced solid tumours mainly in combination with additional immunostimulating agents.
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Affiliation(s)
- Grazia Graziani
- Pharmacology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.
| | - Lucia Lisi
- Section of Pharmacology, Department of Healthcare Surveillance and Bioethics, Catholic University Medical School, Catholic University of the Sacred Heart, Rome, Italy
| | - Lucio Tentori
- Pharmacology Section, Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Pierluigi Navarra
- Section of Pharmacology, Department of Healthcare Surveillance and Bioethics, Catholic University Medical School, Catholic University of the Sacred Heart, Rome, Italy
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6
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Tiemann M, Atiakshin D, Samoilova V, Buchwalow I. Identification of CTLA-4-Positive Cells in the Human Tonsil. Cells 2021; 10:cells10051027. [PMID: 33925389 PMCID: PMC8145386 DOI: 10.3390/cells10051027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/14/2021] [Accepted: 04/24/2021] [Indexed: 12/31/2022] Open
Abstract
CTLA-4 (cytotoxic T-lymphocyte-associated protein 4) was originally defined as a T-lymphocyte antigen and was used as a target in cancer immunotherapy. Unfortunately, the existence of CTLA-4 in cells other than T-lymphocytes is often overlooked. The goal of the present study was to analyze the distribution pattern of CTLA-4 in the human tonsils using a panel of anti-CTLA-4 antibodies of different clones. We found that CTLA-4 was expressed in T-lymphocyte cells of various geneses, including hematopoietic cells and their derivatives (monocytes, macrophages, dendritic, plasma cells, mast cells, and neutrophils), as well as stromal cells of mesodermal (mesenchymal) origin and reticular epithelial cells of ectodermal origin. The expression of CTLA-4 in cells of different origins supports the proposition that CTLA-4 is not restricted to the lymphoid cell lineage and can provide broader effects of CTLA-4 on immune regulation.
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Affiliation(s)
- Markus Tiemann
- Institute for Hematopathology, Fangdieckstr. 75a, 22547 Hamburg, Germany; (M.T.); (V.S.)
| | - Dmitri Atiakshin
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, Peoples’ Friendship University of Russia, 117198 Moscow, Russia;
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, 394036 Voronezh, Russia
| | - Vera Samoilova
- Institute for Hematopathology, Fangdieckstr. 75a, 22547 Hamburg, Germany; (M.T.); (V.S.)
| | - Igor Buchwalow
- Institute for Hematopathology, Fangdieckstr. 75a, 22547 Hamburg, Germany; (M.T.); (V.S.)
- Correspondence: ; Tel.: +49-(040)-7070-85317; Fax: +49-(040)-7070-85110
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7
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Porcellato I, Brachelente C, Cappelli K, Menchetti L, Silvestri S, Sforna M, Mecocci S, Iussich S, Leonardi L, Mechelli L. FoxP3, CTLA-4, and IDO in Canine Melanocytic Tumors. Vet Pathol 2020; 58:42-52. [PMID: 33021155 DOI: 10.1177/0300985820960131] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite promising immunotherapy strategies in human melanoma, there are few studies on the immune environment of canine melanocytic tumors. In humans, the activation of immunosuppressive cell subpopulations, such as regulatory T cells (Tregs) that express forkhead box protein P3 (FoxP3), the engagement of immunosuppressive surface receptors like cytotoxic T lymphocyte antigen (CTLA-4), and the secretion of molecules inhibiting lymphocyte activation, such as indoleamine-pyrrole 2,3-dioxygenase (IDO), are recognized as immunoescape mechanisms that allow tumor growth and progression. The aim of our study was to investigate the expression of these immunosuppression markers in canine melanocytic tumors and to postulate their possible role in melanoma biology and progression. Fifty-five formalin-fixed, paraffin-embedded canine melanocytic tumors (25 oral melanomas; 20 cutaneous melanomas; 10 cutaneous melanocytomas) were selected to investigate the expression of FoxP3, CTLA-4, and IDO by immunohistochemistry and RT-qPCR (real-time quantitative polymerase chain reaction). All of the tested markers showed high gene and protein expression in oral melanomas and were differently expressed in cutaneous melanomas when compared to their benign counterpart. IDO expression was associated with an increased hazard of death both in univariable and multivariable analyses (P < .05). FoxP3 protein expression >6.9 cells/HPF (high-power field) was an independent predictor of death (P < .05). CTLA-4 gene and protein expressions were associated with a worse prognosis, but only in the univariable analysis (P < .05). FoxP3, CTLA-4, and IDO likely play a role in canine melanoma immunoescape. Their expression, if supported by future studies, could represent a prognostic tool in canine melanoma and pave the way to future immunotherapeutic approaches in dogs.
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Affiliation(s)
| | | | | | - Laura Menchetti
- 9309University of Perugia, Perugia, Italy.,Department of Agricultural and Food Sciences (DISTAL), University of Bologna
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Davis AS, Chang MY, Brune JE, Hallstrand TS, Johnson B, Lindhartsen S, Hewitt SM, Frevert CW. The Use of Quantitative Digital Pathology to Measure Proteoglycan and Glycosaminoglycan Expression and Accumulation in Healthy and Diseased Tissues. J Histochem Cytochem 2020; 69:137-155. [PMID: 32936035 DOI: 10.1369/0022155420959146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Advances in reagents, methodologies, analytic platforms, and tools have resulted in a dramatic transformation of the research pathology laboratory. These advances have increased our ability to efficiently generate substantial volumes of data on the expression and accumulation of mRNA, proteins, carbohydrates, signaling pathways, cells, and structures in healthy and diseased tissues that are objective, quantitative, reproducible, and suitable for statistical analysis. The goal of this review is to identify and present how to acquire the critical information required to measure changes in tissues. Included is a brief overview of two morphometric techniques, image analysis and stereology, and the use of artificial intelligence to classify cells and identify hidden patterns and relationships in digital images. In addition, we explore the importance of preanalytical factors in generating high-quality data. This review focuses on techniques we have used to measure proteoglycans, glycosaminoglycans, and immune cells in tissues using immunohistochemistry and in situ hybridization to demonstrate the various morphometric techniques. When performed correctly, quantitative digital pathology is a powerful tool that provides unbiased quantitative data that are difficult to obtain with other methods.
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Affiliation(s)
- A Sally Davis
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas
| | - Mary Y Chang
- Department of Comparative Medicine, University of Washington, Seattle, Washington.,Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Jourdan E Brune
- Department of Comparative Medicine, University of Washington, Seattle, Washington.,Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Teal S Hallstrand
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington.,Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Brian Johnson
- Department of Comparative Medicine, University of Washington, Seattle, Washington
| | - Sarah Lindhartsen
- Department of Comparative Medicine, University of Washington, Seattle, Washington
| | - Stephen M Hewitt
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
| | - Charles W Frevert
- Department of Comparative Medicine, University of Washington, Seattle, Washington.,Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington.,Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
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