单细胞多细胞识别了急性心肌炎中专门的细胞毒性和迁移性CD8+ T细胞
Zhonghua Tong1,2, Xiangyu Yan1,2, Tao Chen1,2
1Departments of Cardiology (Z.T., X.Y., T.C., W.S., D.S., N.W., Y.Z., Y.K., D.W., P.W., Y.C., X.W., J.C., J.S., S.L., Yanxi Li, Q.Y., Z.Z., Z.J., F.L., Z.L., S.Y., H.J., M.Z., B.Y.), The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
Circulation
|August 5, 2025
概括
富林性心肌炎涉及特定的CD57+CD8+T细胞和IL-18. 针对这些免疫路径可能为这种危及生命的心脏炎症提供新的治疗方法.
科学领域:
- 免疫学
- 心脏病学
- 多种类型
背景情况:
- 急性心肌炎 (AM),特别是发性心肌炎 (FM),是一种严重的心脏炎症,目标治疗有限.
- 了解潜在的免疫机制对于开发新的AM和FM治疗策略至关重要.
研究的目的:
- 使用多组学方法对AM患者的免疫环境进行全面分析.
- 确定导致AM和FM病变的特定致病性免疫子集和分子变化.
- 探索潜在的治疗点,以缓解AM中的免疫相关心脏损伤.
主要方法:
- 包括单细胞RNA测序,T细胞受体测序,CyTOF和患者血液样本上的蛋白质分析.
- 在体外验证已识别的致病性免疫细胞功能和诱导信号.
- 在Coxsackievirus B3诱导的FM小鼠模型中进行分析,包括CyTOF和药物阻塞实验.
主要成果:
- 在AM患者中显著丰富和克隆扩张具有高细胞毒性和迁移潜力的CD57+CD8+效应T细胞.
- 在 FM 病例中的 CD57+CD8+ T 细胞中增加自然杀手类受体基因,与细胞毒性增加有关.
- 升高的IL-18水平诱导了CD57+CD8+T细胞分化;亲炎性单细胞有助于IL-18和交叉通话.
- 在FM小鼠中观察到类似的免疫扩张和升高的IL-18; 破坏致病轴缓解了FM.
结论:
- 具有高细胞毒性和迁移潜力的克隆CD57+CD8+效应T细胞是AM病变发生的关键因素,特别是FM.
- 上游的炎症信号,包括IL-18和促炎单细胞,驱动病原性免疫反应.
- 针对已识别的免疫轴为AM和FM治疗提供了一个有前途的治疗策略.
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