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由于减弱的Foxp3表达,调节性T细胞功能被颠覆和转化
Yisong Y Wan1, Richard A Flavell
1Section of Immunobiology, Yale University School of Medicine, 300 Cedar Street, New Haven, Connecticut 06520, USA.
Nature
|January 16, 2007
概括
调控性T细胞 (T(r)) 控制自我耐受性,而Foxp3对它们的功能至关重要. 这项研究表明,减少Foxp3表达会损害T(r) 细胞抑制,通过将它们转化为效应细胞,导致自身免疫性疾病.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 调节性T细胞 (T(r)) 对于维持自我耐受性和免疫抑制至关重要.
- Foxp3 是一个关键的转录因子,控制T (r) 细胞的发育和功能.
- 减少Foxp3表达与免疫系统疾病有关,挑战了二进制开/关开关模型.
研究的目的:
- 调查Foxp3是否以剂量依赖的方式调节T(r) 细胞功能.
- 确定减弱的Foxp3表达对T (r) 细胞功能和免疫平衡的后果.
- 阐明Foxp3水平在自身免疫性疾病发展中的作用.
主要方法:
- 产生了一种小鼠模型,在T(r) 细胞中具有减弱的内源性Foxp3基因表达.
- 评估了胸膜发育,恒常扩张和Foxp3表达细胞的新生代.
- 评估了Foxp3.3减少的T细胞的体外和体内免疫抑制活动和无能性特性.
主要成果:
- 减弱的Foxp3表达导致了激进的自身免疫综合征,而不会影响胸腺发育或新生代.
- 消灭了T (r) 细胞的免疫抑制功能,同时保持了其无敏性质.
- 降低Foxp3的T细胞优先分化为T助手2 (T(h) 2) 作用体,导致自身免疫病理.
结论:
- Foxp3以剂量依赖的非二进制方式调节T (r) 细胞功能.
- 减少Foxp3的表达导致免疫疾病通过损害T (r) 细胞抑制功能和促进效应细胞分化.
- 这些发现提供了对T (r) 细胞调节和人类免疫疾病病因学的见解.
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