RIPK1保护天真和调节性T细胞免受TNFR1诱导的亡
Jelle Huysentruyt1,2, Wolf Steels1,2, Mario Ruiz Perez1,2
1Cell death and Inflammation Unit, VIB-UGent Center for Inflammation Research, Ghent, Belgium.
Cell death and differentiation
|May 11, 2024
概括
受体相互作用蛋白激酶1 (RIPK1) 对于T细胞存活至关重要. 它的缺失导致T细胞淋巴衰竭,通过参与TNF和酶-8介导的亡,突出显示RIPK1.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞死亡途径 细胞死亡途径
- 在T细胞恒温中,T细胞恒温.
背景情况:
- 为了防止自身免疫和免疫缺陷,T细胞群体的大小受到严格监管.
- 众所周知,受体相互作用蛋白激酶1 (RIPK1) 调节T细胞存活率和恒温.
- 不同的T细胞子集中对RIPK1的特定需求以及它们的细胞死亡途径在体内仍然在很大程度上是未知的.
研究的目的:
- 研究RIPK1在外围T细胞子集中的差异性要求.
- 在体内阐明缺乏RIPK1的T细胞所参与的编程细胞死亡途径.
- 确定 RIPK1 的支架功能与其酶活性在 T 细胞平衡中的作用.
主要方法:
- 在常规T细胞中Ripk1的条件消去 (Ripk1ΔCD4).
- 混合骨髓模拟器来评估竞争性生存.
- 在成年小鼠中,他莫西芬诱导RIPK1的删除.
- 对Ripk1K45A小鼠进行分析,以区分支架与激酶功能.
- 单细胞RNA测序和产生双淘汰的小鼠 (Ripk1ΔCD4Casp8ΔCD4和Ripk1ΔCD4Tnfr1-/-).
主要成果:
- 在T细胞中Ripk1的条件切除导致了外围T细胞淋巴缺血,影响了天真CD4 +,天真CD8 +和调节性T细胞.
- 缺乏 RIPK1 的 T 细胞表现出竞争性生存劣势,并通过 TNF 和 caspase-8 介导的亡死亡.
- 淋巴衰竭归因于RIPK1的支架功能,而不是其激酶活性,并且由于Caspase-8或TNFR1.1.的额外缺乏而得救.
结论:
- 作为支架蛋白,RIPK1对于维持外围T细胞平衡是必不可少的.
- 在T细胞中RIPK1缺乏导致它们通过TNF和caspase-8依赖的亡死亡.
- 这些发现强调了RIPK1在预防T细胞损失和维持免疫平衡方面的关键作用.
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