在没有TGF-β信号的情况下,产生致病性T(H) 17细胞
Kamran Ghoreschi1, Arian Laurence, Xiang-Ping Yang
1Molecular Immunology and Inflammation Branch, National Institute of Arthritis, Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA. ghoreschik@mail.nih.gov
Nature
|October 22, 2010
概括
互白素-1β (IL-1β) 和IL-23可以诱导T助手17 (T(H) 17细胞的分化,而无需转化增长因子-β (TGF-β). 这种替代途径产生致病性T(H) 17细胞,突出IL-23细胞.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞和分子免疫学 细胞和分子免疫学
- 在T细胞分化过程中.
背景情况:
- 辅助性T细胞17 (T(H) 17对于宿主防御和自身免疫非常重要.
- 介素-23 (IL-23) 在体内对T(H) 17细胞至关重要,但不被认为是驱动初始分化.
- 介质素-6 (IL-6) 和转化生长因子β1 (TGF-β1) 被认为是T(H) 17细胞特异性的主要驱动因素.
研究的目的:
- 研究T(H) 17细胞分化的替代途径.
- 要确定T(H) 17分化是否可以独立于TGF-β信号传递.
- 探索IL-6,IL-23和IL-1β在启动T(H) 17细胞分化中的作用.
主要方法:
- 用IL-6,IL-23和IL-1β组合培养的天真T细胞前体.
- 评估关键基因促进体 (Il17a,Il17f,Rorc) 的IL-17产生和表观遗传修饰.
- 在没有TGF-β1的情况下在体外生成T(H) 17细胞,并在实验性过敏脑炎模型中评估它们的致病性.
主要成果:
- T(H) 17细胞分化发生的独立于TGF-β信号传递.
- 单独IL-6和IL-23是无效的,但它们与IL-1β的结合有效诱导IL-17的产生.
- 在没有TGF-β1.1.的情况下,观察到表观遗传修饰和致病性T-bet(+) RORγt(+) T(H) 17细胞的产生.
结论:
- 存在一种替代的T(H) 17细胞分化的途径,在没有TGF-β的情况下由IL-1β和IL-23驱动.
- 这一途径产生致病性T(H) 17细胞,与实验性过敏脑膜炎等自身免疫性疾病相关.
- 这些发现强调了IL-23在T(H) 17细胞生物学中的关键作用,并表明了潜在的治疗含义.
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