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胸膜Bmi-1阻碍了γδT17生成及其衍生的RORγt-IL-17A信号传递,以延迟心脏衰老

Qiuyi Wang¹, Yue Wang¹, Yujie Lin¹

¹Department of Human Anatomy, School of Basic Medical Sciences, Key Laboratory for Aging and Disease, Nanjing Medical University, Nanjing, Jiangsu 211166, China.

Proceedings of the National Academy of Sciences of the United States of America

|May 14, 2025

概括

蒂米克Bmi-1通过抑制IL-17A产生T细胞来预防心脏缩. 这项研究揭示了Bmi-1

科学领域:

免疫学免疫学免疫学
心脏病学心脏病学
衰老研究研究衰老研究

背景情况:

随着年龄的增长,心力衰竭和与衰老相关的病态心脏缩 (SA-PCH),INTERLEUKIN-17A (IL-17A) 的水平会增加.
胸膜Bmi-1表达与IL-17A和生理衰老负相关.

研究的目的:

研究Bmi-1在T细胞衰老中的作用及其预防SA-PCH的潜力.
阐明Bmi-1调节T细胞分化和IL-17A产生的分子机制.

主要方法:

使用Bmi-1缺乏的小鼠 (Bmi-1^f/fLckCre^+) 和产后对照.
分析了胸膜T细胞发育,诺奇信号传递和γδT17细胞分化.
研究了Bmi-1对RORγt无化,降解和IL-17A产生的影响.
在体内检查了抑制RORγt和IL-17A对SA-PCH的影响.
评估了RORγt,Bmi-1和RING1B之间的结合相互作用.

主要成果:

Bmi-1通过Notch信号传递促进胸膜T细胞的发育,并抑制γδT17细胞的分化.
Bmi-1通过抑制p53-介导的Ikzf1转录来提高Notch信号的调节.
Bmi-1-RING1B复合物促进RORγt的泛化和降解,减少IL-17A的产生.
Bmi-1通过H3K27三甲基化降低Rorc的表达.
减少的外围 γδT17 细胞改善了心脏功能,并减轻了SA-PCH,SASP和巨细胞-肌纤维细胞过渡.
RORγt 抑制剂和IL-17A 中和抗体阻止了SA-PCH.

结论:

胸膜Bmi-1通过减少γδT17细胞数量,在预防依赖IL-17A的SA-PCH方面发挥着关键作用.
针对Bmi-1-RING1B-RORγt轴为SA-PCH提供了一个潜在的治疗策略.

关键词:

在BMI-1中,它们的IL-17A是IL-17A.罗尔特的时间.与衰老相关的病理性心脏缩的 γδT17 细胞.

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