调节失调通过干扰AMPK/Drp1通路来破坏线粒体平衡,从而加剧斑块的进展和不稳定性
Pingping Hu1, Mengmeng Liu2, Tongtong Wu2
1Chongqing Key Laboratory for Pharmaceutical Metabolism Research, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China.
Theranostics
|August 4, 2025
概括
在大动脉细胞中,sarcoplasmic/endoplasmic网膜 ATPase 2 (SERCA2) 功能障碍通过AMPK/Drp1通路破坏线粒体功能,加速动脉样硬化. 向AMPK或Drp1可以治疗斑块脆弱性.
科学领域:
- 心血管生物学 心血管生物学
- 线粒体医学 线粒体医学
- 动脉样硬化研究 动脉样硬化研究
背景情况:
- ATPase 2 (SERCA2) 功能障碍,特别是Cys674的不活化,影响平衡.
- SERCA2功能障碍与动脉样硬化和大动脉动脉瘤有关,但其在大动脉光滑肌细胞 (SMC) 中的作用尚不清楚.
研究的目的:
- 为了调查SERCA2功能障碍在大动脉SMC中的确切作用.
- 阐明SERCA2功能障碍对动脉样硬化病原的贡献.
主要方法:
- 使用异质合体SERCA2 C674S敲进 (SKI) 鼠标来模拟SERCA2功能障碍.
- 在大动脉组织和初级SMC上进行了组织学,RNA测序,蛋白质组和细胞培养分析.
主要成果:
- SKI SMC 呈现了激活的腺5'-单酸盐激活蛋白激酶 (AMPK) /胺相关蛋白1 (Drp1) 途径,线粒体功能障碍和受损的 SMC 功能.
- 药理学向AMPK (甲胺,AICAR) 或Drp1 (Mdivi-1) 恢复了线粒体平衡和SMC功能.
- 在体内给予甲福明和Mdivi-1,在SKI小鼠中改善了动脉样硬化和增强了斑块稳定性.
结论:
- 在大动脉SMC中,SERCA2功能障碍通过破坏AMPK/Drp1通路加速动脉样硬化,导致线粒体疾病和功能障碍.
- 对AMPK或Drp1的药理向是动脉样硬化的一种有希望的治疗策略,特别是在减少斑块脆弱性方面.
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