心脏纤维细胞衍生的线粒体丰富的sEVs通过NLRP3通路调节组织炎症和心肌梗塞后心室重塑
Yuanyuan Zhao1, Ya Hu1, Yifei Wang1
1Department of Cardiology, Zhongda Hospital, Southeast University, Nanjing 210009, PR China.
Pharmacological research
|February 27, 2025
概括
心脏纤维细胞在心肌梗塞 (MI) 后通过小细胞外囊泡 (sEV) 转移受损的线粒体,通过激活NLRP3.3促进炎症和心脏功能障碍. 抑制这种途径可能会改善心脏功能.
科学领域:
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 心脏纤维细胞 (CFs) 是心肌梗塞 (MI) 后炎症的关键.
- 线粒体可以在细胞外释放,包括通过细胞外囊泡 (EVs).
- 小型电动汽车 (sEV) 参与细胞间通信.
研究的目的:
- 为了调查CF是否通过sEVs传输受损的线粒体组件后MI.
- 确定这些CFs衍生的sEVs在调节炎症反应中的作用.
- 阐明涉及NLRP3激活的潜在机制.
主要方法:
- 在小鼠中的心肌梗塞 (MI) 模型.
- 在CFs衍生的sEV中使用纳米流细胞计检测线粒体成分.
- 无标签的蛋白质组学来分析sEV蛋白质表达.
- 在体外共培养CFs-sEV与骨髓衍生巨细胞 (BMDMs).
- 在体内评估sEV对MI小鼠的影响,有或没有NLRP3抑制剂 (CY-09).
主要成果:
- 线粒体组分被发现在CFs衍生的sEVs后MI.
- 损坏的线粒体组件从缺乏氧气-葡萄糖的CF (CFs-mt-sEVs) 中获得了sEV.
- 在BMDM中,CFs-mt-sEVs促进了促炎激活.
- 内心肌内注射的CFs-mt-sEVs恶化了炎症,心脏功能障碍和心室重塑后的MI.
- 这些效应是由NLRP3激活介导的,由CY-09逆转.
结论:
- CFs通过sEVs转移受损的线粒体组件后MI.
- 这种转移促进了巨细胞炎症,并通过NLRP3激活加剧了心脏重塑.
- 准CFs-mt-sEVs和NLRP3为后创伤性心脏病恢复提供了一个潜在的治疗策略.
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