McLaughlin, KA, Richardson, CC, Williams, S et al. (7 more authors) (2015) Relationships between major epitopes of the IA-2 autoantigen in Type 1 diabetes: Implications for determinant spreading. Clinical Immunology, 160 (2). pp. 226-236. ISSN 1521-6616
Abstract
Diversification of autoimmunity to islet autoantigens is critical for progression to Type 1 diabetes. B-cells participate in diversification by modifying antigen processing, thereby influencing which peptides are presented to T-cells. In Type 1 diabetes, JM antibodies are associated with T-cell responses to PTP domain peptides. We investigated whether this is the consequence of close structural alignment of JM and PTP domain determinants on IA-2. Fab fragments of IA-2 antibodies with epitopes mapped to the JM domain blocked IA-2 binding of antibodies that recognise epitopes in the IA-2 PTP domain. Peptides from both the JM and PTP domains were protected from degradation during proteolysis of JM antibody:IA-2 complexes and included those representing major T-cell determinants in Type 1 diabetes. The results demonstrate close structural relationships between JM and PTP domain epitopes on IA-2. Stabilisation of PTP domain peptides during proteolysis in JM-specific B-cells may explain determinant spreading in IA-2 autoimmunity.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article is available under the terms of the Creative Commons Attribution License (CC BY). |
Keywords: | Type 1 diabetes; Autoantibody; Monoclonal antibody; Epitope; Determinant spreading |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Genetics, Health and Therapeutics (LIGHT) > Division of Epidemiology & Biostatistics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 10 Jul 2015 11:24 |
Last Modified: | 09 Feb 2016 13:35 |
Published Version: | http://dx.doi.org/10.1016/j.clim.2015.06.002 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.clim.2015.06.002 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:87879 |