过度的线粒体分裂和相关的细胞外线粒体在肥胖心肌病症中介于心脏功能障碍
Sin-Jin Li1, Laura H Tetri2, Vijith Vijayan3
1Bachelor Program of Biotechnology and Food and Nutrition, National Taiwan University, Taipei 10617, Taiwan; Institute of Biotechnology, National Taiwan University, Taipei 10617, Taiwan; Department of Animal Science and Technology, National Taiwan University, Taipei 10672, Taiwan.
Life sciences
|April 26, 2025
概括
过度的线粒体裂变会释放细胞外线粒体,导致炎症和功能障碍在肥胖心肌病. 在临床前模型中,用P110抑制这一过程改善了心脏功能,并减少了炎症.
科学领域:
- 心血管生物学 心血管生物学
- 线粒体生物学 线粒体生物学
- 肥胖问题研究研究
背景情况:
- 肥胖性心肌病 (OCM) 涉及线粒体功能障碍和改变动态.
- 细胞外线粒体 (exMito) 在组织损伤时会释放出来.
- 过度线粒体分裂和exMito释放在OCM中的作用尚不清楚.
研究的目的:
- 调查是否过度的线粒体裂变和随后的exMito释放有助于OCM.
- 为了确定抑制线粒体分裂对OCM病理学的影响.
主要方法:
- 在体外:用棕酸盐 (PA) 处理的H9c2心肌细胞,以模拟脂毒性.
- 在体内:C57BL/6J小鼠在12周内接受高脂肪饮食 (HFD),以诱导OCM.
- 使用P110.1的药理抑制Drp1/Fis1相互作用.
主要成果:
- 在体外,PA诱导了线粒体裂变,氧化应激,减少ATP和exMito释放.
- 来自受PA治疗的细胞的ExMito在原始细胞中引起了线粒体功能障碍和炎症.
- HFD诱导心脏功能障碍,exMito释放,以及体内炎症.
- 在体外和体外模型中,P110治疗减轻了这些有害影响.
结论:
- 抑制Drp1/Fis1依赖的线粒体裂变与P110改善了脂毒性诱导的线粒体功能障碍和exMito释放.
- 在OCM模型中,P110治疗改善了炎症状态和心脏收缩功能.
- 针对Drp1/Fis1介导的裂变和exMito释放,为OCM提供了一个潜在的治疗策略.
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