通过低氧诱导因子1控制T (H) 17/T (reg) 平衡
Eric V Dang1, Joseph Barbi, Huang-Yu Yang
1Immunology and Hematopoiesis Division, Department of Oncology and Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Maryland 21231, USA.
Cell
|August 30, 2011
概括
低氧诱导因子1 (HIF-1) 控制T细胞分化,促进T细胞,同时抑制调节性T细胞 (T细胞). 代谢因素影响T细胞命运,为免疫疾病提供潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢调节 代谢调节 代谢调节
- 细胞分化 细胞分化
背景情况:
- 将T细胞分化成效应和调节子集对于免疫恒温至关重要.
- 细胞因子环境和代谢状态影响T细胞命运决定.
- 调节性T细胞 (T(reg)) 抑制免疫反应,而T(H) 17细胞促进炎症.
研究的目的:
- 研究缺氧诱导因子1 (HIF-1) 在调节T(reg) 和T(H) 17细胞分化的平衡中的作用.
- 阐明HIF-1控制T细胞子集发育的分子机制.
- 评估HIF-1在T细胞介导的自身免疫性疾病中的体内相关性.
主要方法:
- 在不同氧气条件下对T细胞分化的分析.
- 涉及转录激活,蛋白质复合体形成和蛋白质体降解的分子研究.
- 使用转基因小鼠 (HIF-1α缺乏T细胞) 进行体内研究,以建模实验性自身免疫脑炎 (EAE).
主要成果:
- HIF-1通过激活RORγt并促进协作激活剂向IL-17促进体的招募来促进T(H) 17的分化.
- HIF-1通过结合Foxp3并促进其降解来抑制T(reg) 的发展.
- 缺乏HIF-1α的T细胞表现出减少的T (H) 17和增加的T (reg) 种群,从而产生对EAE的抗性.
- 这些HIF-1的调节效应在正常和缺氧条件下都被观察到.
结论:
- HIF-1作为一个关键的代谢传感器,决定T细胞谱系的承诺.
- 代谢调节,特别是针对HIF-1,可以重新平衡T细胞种群,并可能治疗T细胞介导的自身免疫病理.
- 这些发现强调了代谢线索在塑造适应性免疫反应中的重要性.
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