Th17淋巴细胞与风湿免疫性疾病关系的研究进展
2017-10-25文丽丹杨海玉
文丽丹+杨海玉
[摘要] 2005年首次发现不同于Th1和Th2的CD4+T细胞亚群,人们将这种主要分泌IL-17的Th细胞命名为Th17。Th17细胞具有独立的分化和发育过程,而IL-17是T细胞诱导炎性反应的早期启动因子,通过促进炎症细胞因子的释放来放大炎性反应。Th17细胞已被证实在风湿免疫性疾病的发病中发挥重要的致病作用。然而,Th17的作用与调控机制尚不明确,有待进一步探讨与研究。本综述简要阐述了有关Th17细胞及其分泌的细胞因子参与风湿免疫性疾病发病的研究进展。
[关键词] 辅助性T细胞17;白细胞介素-17;类风湿性关节炎;系统性红斑狼疮
[中图分类号] R593.2 [文献标识码] A [文章编号] 1673-7210(2017)09(b)-0049-04
Institute of Clinical Medical Sciences, Jiangxi Provincial People′s Hospital, Jiangxi Province, Nanchang 330006, China
[Abstract] In 2005 firstly described a newly CD4+T helper cell, the identification of the new subpopulation of T helper cells and it was named Th17. Th17 cells have independence capable of differentiation and development process. IL-17 is an early startup-factor of inflammatory response induced by T cell, can promote the release of inflammatory cytokines to amplify inflammatory response. Th17 cells have been shown play an important role in pathogenesis of rheumatic immunologic disease. However, the role of Th17 cells and regulation mechanism is not clear and needs further discussion and research. The research progress of Th17 cells and their secretion of cytokines involved in rheumatic immunologic disease is reviewed in this article.
[Key words] Th17; IL-17; Rheumatoid arthritis; Systemic lupus erythematosus
Th17细胞在多种风湿免疫性疾病的发生发展中介导细胞免疫炎性反应,从而导致靶细胞及器官的功能障碍。大量动物实验和临床实验的研究结果表明IL-17在组织炎症、自身免疫和宿主防御机制中发挥关键作用,参与多种风湿免疫性疾病的发病过程,如类风湿关节炎(RA)、動脉粥样硬化(AS)、系统性红斑狼疮(SLE)等。
1 Th17细胞的生物学特性及相关细胞因子信号通路
IL-17是Th17的标志性细胞因子。目前已知有6种IL-17亚型A~F,但Th17只产生IL-17A和IL-17F这两种亚型,都是促炎因子。IL-17是T细胞诱导炎性反应的早期启动子,与受体结合后有效介导中性粒细胞动员的兴奋过程,诱导靶蛋白释放炎症介质。近年来研究显示,IL-17A和IL-17F在许多疾病特别是风湿免疫性疾病的发展中发挥作用[1]。此外,Th17还可分泌促炎因子IL-21和IL-22。IL-21可以帮助重新恢复Th17/Tregs平衡。IL-22是IL-10家族成员,而IL-10与慢性炎症特别是许多免疫性疾病发病机制相关[2]。……
