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代谢异质性是TH17细胞干细胞和可塑性的基础
Peer W F Karmaus1, Xiang Chen2, Seon Ah Lim1
1Department of Immunology, St Jude Children's Research Hospital, Memphis, TN, USA.
辅助TH17细胞在自身免疫性疾病中表现出功能和代谢的多样性. 一个具有干细胞特征和低代谢的子集与一个高代谢的子集形成对比,该子集转化为TH1类细胞,由mTORC1信号调节.
科学领域:
- 免疫学
- 细胞生物学
- 代谢过程
背景情况:
- 适应性免疫依赖于记忆T细胞进行感染控制.
- 在慢性感染中,CD8+ T细胞表现为干状的枯竭子集.
- CD4+ TH17细胞在自身免疫和炎症中至关重要,具有可塑性.
- 对于TH17细胞可塑性的调节尚不清楚.
研究的目的:
- 研究自身免疫性疾病中TH17细胞的功能和代谢异质性.
- 确定TH17细胞命运和可塑性的分子调节剂.
- 阐明代谢控制在TH17细胞分化和自身免疫病原性的作用.
主要方法:
- 我们使用了小鼠自身免疫性疾病模型.
- 使用单细胞RNA测序.
- 对TH17细胞子集和信号通路进行实验验证.
- 研究了mTORC1信号传递和代谢活动的作用.
主要成果:
- 确定了两个不同的TH17细胞子集:一个具有干细胞特征和低代谢,另一个具有支持TH1转基因的高代谢.
- 证明TCF-1,T-bet和CD27表达定义了这些子集.
- 显示的mTORC1信号是TH17细胞命运的中心调节者,协调新陈代谢和转录.
- 破坏mTORC1或代谢导致TCF-1上调,干性特征和TH1转差受损,从而防止神经炎症.
结论:
- 自体免疫的TH17细胞反应的特征是干性和效应器功能之间的二分法.
- 代谢控制,特别是通过mTORC1,是TH17细胞可塑性和自身免疫病变的关键调节者.
- 了解这种异质性为自身免疫性疾病提供了潜在的治疗点.
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