Erschienen in:
01.09.2008
Association of Graves’ Disease and Prevalence of Circulating IFN-γ-producing CD28− T Cells
verfasst von:
Zhiping Sun, Weixue Zhong, Xiang Lu, Bimin Shi, Yibei Zhu, Lei Chen, Guangbo Zhang, Xueguang Zhang
Erschienen in:
Journal of Clinical Immunology
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Ausgabe 5/2008
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Abstract
Background
Peripheral blood CD4+ and CD8+ T-cell subsets lacking surface CD28 have been suggested to predispose patients to immune-mediated disorders.
Materials and Methods
To determine the role of CD28− T-cell subset in Graves’ disease (GD), we characterized peripheral blood CD4+CD28− and CD8+CD28− T cell from early onset GD patients.
Results and Discussion
GD patients had significantly higher percentages of CD4+CD28− and CD8+CD28− T cells than did healthy donors. Both CD28− T cells expressed mostly CD45RO, suggesting that they are activated and/or are memory T cells. GD patient-derived CD4+CD28− and CD8+CD28− T cells produced more intracellular IFN-γ than their counterparts from healthy donors. Furthermore, CD4+CD28− and CD8+CD28− T cells from GD patients with Graves’ ophthalmopathy (GO) secreted higher level of intracellular IFN-γ than those CD28− T cells from GD patients without GO. Retrospective analysis showed that the increased levels of CD4+CD28− T cells and their IFN-γ-producing subgroups were positively correlated to the serum anti-thyrotropin receptor (TSHR) autoantibodies (TRAb). Our observations suggest that increased IFN-γ-producing CD28− T cells in GD patients may play an important role in the pathogenesis of GD.