Correlation between thyroidal and peripheral blood total T cells, CD8+ T cells, and CD8+ T- regulatory cells and T-cell reactivity to calsequestrin and collagen XIII in patients with Graves’ ophthalmopathy

Al-Ansari, Farah, Lahooti, Hooshang, Stokes, Leanne, Edirimanne, Senarath and Wall, Jack (2018) Correlation between thyroidal and peripheral blood total T cells, CD8+ T cells, and CD8+ T- regulatory cells and T-cell reactivity to calsequestrin and collagen XIII in patients with Graves’ ophthalmopathy. Endocrine Research, 43 (4). pp. 264-274. ISSN 0743-5800

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Abstract

Purpose/aim of the study: Graves’ ophthalmopathy (GO) is closely related to the thyroid autoimmune disorder Graves’ disease. Previous studies have suggested roles for thyroidal CD8+ T cells and autoimmunity against calsequestrin-1 (CASQ)-1 in the link between thyroidal and orbital autoimmune reactions in GO. A role for autoimmunity against CollXIII has also been suggested. In this study, we aimed to investigate correlations between some thyroidal and peripheral blood T-cell subsets and thyroidal T-cell reactivity against CASQ1 and CollXIII in patients with GO. Materials and methods: Fresh thyroid tissues were processed by enzyme digestion and density gradient to isolate mononuclear cells (MNCs). Peripheral blood MNCs were also isolated using density gradient. Flow-cytometric analysis was used to identify the various T-cell subsets. T -cell reactivity to CASQ1 and CollXIII was measured by a 5-day culture of the MNCs and BrdU uptake method. Results: We found a positive correlation between thyroidal CD8+ T cells and CD8+ T-regulatory (T-reg) cells in patients with GO. Thyroidal T cells from two out of the three patients with GO tested (66.7%) showed a positive response to CASQ1, while thyroidal T cells from none of the six Graves’ Disease patients without ophthalmopathy (GD) tested showed a positive response to this antigen. Thyroidal T cells from these patient groups however, showed no significant differences in their response to CollXIII. Conclusions: Our observations provide further evidence for a possible role of thyroidal CD8+ T cells, CD8+ T-reg cells and the autoantigen CASQ1 in the link between thyroidal and orbital autoimmune reactions of GO.

Item Type: Article
Faculty \ School: Faculty of Science > School of Pharmacy
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 27 Nov 2019 01:58
Last Modified: 23 Sep 2020 23:55
URI: https://ueaeprints.uea.ac.uk/id/eprint/73074
DOI: 10.1080/07435800.2018.1470639

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