Treg在亚急性甲状腺炎发病免疫机制中的作用

摘要

Objective To explore the role of regulatory T-lymphocytes(Treg) in the immune pathogenesis of suba-cute thyroiditis (SAT). Methods The proportion of Treg in CD4+T cells in peripheral blood of 46 SAT patients and15 controls was detected using flow cytometry. And the concentration of interleukin-10(IL-10), transforming growth factor-beta1(TGF-β1) and prostaglandin E2(PGE2) in serum of 46 SAT patients and 15 controls was measured with ELISA. In addition, the Forkhead box protein 3 (Foxp3) positive cells in thyroid tissue of 29 SAT patients and20 controls was detected by immunohistochemistry. Results The proportion of Treg in peripheral blood of SAT pa-tients was significantly lower than that of controls (P＜0.05). And the concentration of TGF-β1 in serum of SAT patients was apparently higher than that of controls(P＜0.05). Additionally, the positive rate of Foxp3 in thyroid tissue of SAT patients was markedly higher than that of controls(P＜0.05).Conclusions The decrease of Treg may play an important role in the immune pathogenesis of SAT.%目的 探讨调节性T细胞(Treg)在亚急性甲状腺炎(SAT)发病的免疫机制中的作用.方法 用流式细胞计量术检测46例SAT患者及15名对照者 外周血中Treg占CD4+T细胞的比例;ELISA检测血清中白细胞介素10(IL-10)、转化生长因子β1(TGF-β1)及前列腺素E2(PGE2)的浓度;免疫组织化学 方法检测29例SAT患者及20名对照者甲状腺组织中叉头蛋白3(Foxp3)阳性细胞.结果 SAT患者外周血Treg比例明显低于对照者(P＜0.05); SAT患者血 清中TGF-β1明显高于对照者(P＜0.05) ;SAT患者甲状腺组织中Foxp3阳性率明显高于对照者甲状腺组织(P＜0.05).结论 Treg的减少可能在SAT发 病的免疫机制中起着重要的作用.