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Ettinger RA, Buitinga M, Vandamme C, Afonso G, Gomez R, Arribas-Layton D, Bissenova S, Speake C, Reijonen H, Kinnunen T, Overbergh L, Mallone R, Kwok WW, James EA. Technical Validation and Utility of an HLA Class II Tetramer Assay for Type 1 Diabetes: A Multicenter Study. J Clin Endocrinol Metab 2023; 109:183-196. [PMID: 37474341 DOI: 10.1210/clinem/dgad434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/28/2023] [Accepted: 06/17/2023] [Indexed: 07/22/2023]
Abstract
CONTEXT Validated assays to measure autoantigen-specific T-cell frequency and phenotypes are needed for assessing the risk of developing diabetes, monitoring disease progression, evaluating responses to treatment, and personalizing antigen-based therapies. OBJECTIVE Toward this end, we performed a technical validation of a tetramer assay for HLA-DRA-DRB1*04:01, a class II allele that is strongly associated with susceptibility to type 1 diabetes (T1D). METHODS HLA-DRA-DRB1*04:01-restricted T cells specific for immunodominant epitopes from islet cell antigens GAD65, IGRP, preproinsulin, and ZnT8, and a reference influenza epitope, were enumerated and phenotyped in a single staining tube with a tetramer assay. Single and multicenter testing was performed, using a clone-spiked specimen and replicate samples from T1D patients, with a target coefficient of variation (CV) less than 30%. The same assay was applied to an exploratory cross-sectional sample set with 24 T1D patients to evaluate the utility of the assay. RESULTS Influenza-specific T-cell measurements had mean CVs of 6% for the clone-spiked specimen and 11% for T1D samples in single-center testing, and 20% and 31%, respectively, for multicenter testing. Islet-specific T-cell measurements in these same samples had mean CVs of 14% and 23% for single-center and 23% and 41% for multicenter testing. The cross-sectional study identified relationships between T-cell frequencies and phenotype and disease duration, sex, and autoantibodies. A large fraction of the islet-specific T cells exhibited a naive phenotype. CONCLUSION Our results demonstrate that the assay is reproducible and useful to characterize islet-specific T cells and identify correlations between T-cell measures and clinical traits.
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Affiliation(s)
- Ruth A Ettinger
- Center for Translational Immunology, Benaroya Research Institute, Seattle, WA 98101, USA
| | - Mijke Buitinga
- Laboratory for Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Céline Vandamme
- Department of Clinical Microbiology, Institute of Clinical Medicine, University of Eastern Finland, 70210 Kuopio, Finland
| | - Georgia Afonso
- Diabetes and Autoimmunity Research Laboratory, Université Paris Cité, Institut Cochin, CNRS, INSERM, 75014 Paris, France
| | - Rebecca Gomez
- Center for Translational Immunology, Benaroya Research Institute, Seattle, WA 98101, USA
| | - David Arribas-Layton
- Department of Immunology and Theranostics, City of Hope Medical Center, Beckman Research Institute, Duarte, CA 91010, USA
| | - Samal Bissenova
- Laboratory for Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Cate Speake
- Center for Interventional Immunology, Benaroya Research Institute, Seattle, WA 98101, USA
| | - Helena Reijonen
- Department of Immunology and Theranostics, City of Hope Medical Center, Beckman Research Institute, Duarte, CA 91010, USA
| | - Tuure Kinnunen
- Department of Clinical Microbiology, Institute of Clinical Medicine, University of Eastern Finland, 70210 Kuopio, Finland
- Eastern Finland Laboratory Centre (ISLAB), 70210 Kuopio, Finland
| | - Lut Overbergh
- Laboratory for Clinical and Experimental Endocrinology, KU Leuven, 3000 Leuven, Belgium
| | - Roberto Mallone
- Diabetes and Autoimmunity Research Laboratory, Université Paris Cité, Institut Cochin, CNRS, INSERM, 75014 Paris, France
- Department of Internal Medicine, Assistance Publique Hôpitaux de Paris, Service de Diabétologie et Immunologie Clinique, Cochin Hospital, 75014 Paris, France
| | - William W Kwok
- Center for Translational Immunology, Benaroya Research Institute, Seattle, WA 98101, USA
| | - Eddie A James
- Center for Translational Immunology, Benaroya Research Institute, Seattle, WA 98101, USA
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