The possible role of CD4+CD25highFoxp3+/CD4+IL-17A+ cell imbalance in the autoimmunity of patients

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• 作者：Haibo Xue ; Xiurong Yu ; Lei Ma ; Shoujun Song ; Yuanbin Li ; Li Zhang…
• 关键词：Hashimoto thyroiditis ; Regulatory T cell ; T helper 17 cell ; Thyroid function ; Autoimmunity
• 刊名：Endocrine
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：50
• 期：3
• 页码：665-673
• 全文大小：853 KB
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• 作者单位：Haibo Xue (1)
  Xiurong Yu (2)
  Lei Ma (3)
  Shoujun Song (1)
  Yuanbin Li (4)
  Li Zhang (1)
  Tingting Yang (1)
  Huan Liu (1)
  
  1. Department of Endocrinology and Metabolism, Binzhou Medical University Hospital, Binzhou, China
  2. International Office, Binzhou Medical University Hospital, Binzhou, China
  3. Department of Dermatology, Binzhou Medical University Hospital, No. 661 Second Huanghe Road, Binzhou, 256603, China
  4. Department of Endocrinology and Metabolism, Shanxi Dayi Hospital, Taiyuan, China
  
• 刊物主题：Endocrinology; Diabetes; Internal Medicine; Science, general;
• 出版者：Springer US
• ISSN：1559-0100

文摘

Hashimoto thyroiditis (HT) is a prototypic organ-specific autoimmune thyroid disease, for which the exact etiology remains unclear. The aim of this study was to investigate dynamic changes in regulatory T cell (Treg) and T helper 17 cell (Th17) populations in patients with HT at different stages of thyroid dysfunction, as well as to analyze the possible correlation between the Treg/Th17 cell axis and autoimmune status in HT. We assessed thyroid function and autoantibody serology both in HT patients and in healthy controls (HCs) and divided HT patients into three subgroups according to thyroid function. We then determined the percentages of Treg and Th17 cells in peripheral blood mononuclear cells and analyzed mRNA expression of the Treg and Th17 cell-defining transcription factors Foxp3 and RORγt. In addition, serum levels of TGF-β and IL-17A were assessed. We found that the percentage of Treg cells, Foxp3 mRNA levels, and the ratio of Treg/Th17 cells were all significantly lower in HT patients, while Th17 cell percentages and RORγt mRNA levels were significantly higher. Interestingly, we also observed significant differences in these measurements between HT patient subgroups. Serum IL-17A levels were markedly increased in HT patients, while serum concentrations of TGF-β were lower, compared to HCs. The ratio of Treg/Th17 cells was negatively correlated with the levels of serum thyroperoxidase antibody, thyroglobulin antibody, and thyrotropin (TSH) in HT patients. Taken together, our data suggest that the balance between Treg and Th17 cells shifts in favor of Th17 cells during clinical progression of HT, which is negatively correlated with levels of thyroid-specific autoantibodies and TSH, implying that Treg/Th17 cell imbalance may contribute to thyroid damage in HT. Keywords Hashimoto thyroiditis Regulatory T cell T helper 17 cell Thyroid function Autoimmunity