在PH-LHD中,Treg细胞通过NLRC3信号通过PH-LHD减弱肺静脉重塑
Gulinigeer Zhakeer1, Yanxi Zeng1, Guangxi E1
1Department of Cardiology, Pan-Vascular Research Institute, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China (G.Z., Y.Z., G.E., N.M., P.J., Y.S., M.Z., J.Z., Q.Y., W.P.).
调节性T (Treg) 细胞在左心病 (PH-LHD) 的肺高血压中防止肺静脉重塑. 在Treg细胞中NLRC3缺陷通过增加IL-18促进PH-LHD,这推动了内皮细胞到介质酶细胞的过渡.
科学领域:
- 免疫学 免疫学 免疫学
- 心血管研究研究心血管研究
- 细胞生物学 细胞生物学
背景情况:
- 肺静脉重塑是与左心病 (PH-LHD) 相关的肺高血压的关键病理特征.
- 调控T (Treg) 细胞正在研究它们在缓解这种重塑过程中的潜在作用.
研究的目的:
- 在PH-LHD小鼠模型中研究Treg细胞在肺静脉重塑中的功能.
- 阐明分子机制,特别是NLRC3的作用,Treg细胞通过这种机制影响PH-LHD的进展.
主要方法:
- 使用小鼠模型,包括横向大动脉收缩和Foxp3-DTR/tdTomato小鼠用于Treg细胞耗尽研究.
- 采用NLrc3淘汰,无血性和Cdh5CreERT2-mT/mG小鼠来评估NLrc3在Treg细胞和内皮细胞转化为介质细胞 (EMT) 中的作用.
- 通过蛋白质对接,共免疫沉和共同培养试验,研究蛋白质相互作用和信号通路.
主要成果:
- 在PH-LHD中,Treg细胞在肺静脉周围丰富,对于解决炎症和抑制静脉重塑至关重要.
- 在小鼠和PH-LHD患者中观察到NLrc3表达的减少;NLrc3缺乏会损害Treg细胞功能,并促进EMT.
- NLRC3与TRAM相互作用,调节IRF3/NF-κB信号传输,这反过来又控制IL-18分泌,从而影响EMT和PH-LHD的进展.
结论:
- 在PH-LHD中,NLRC3对于Treg细胞介导的肺静脉重塑的预防至关重要.
- 在NLRC3-Treg细胞轴调节IL-18分泌,抑制EMT和改善PH-LHD的结果.
- 针对这种途径为PH-LHD提供了潜在的治疗策略.
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