FNDC4 预防与衰老相关的心脏功能障碍:通过恢复 AMPKα/PPARα 依存的线粒体功能
Xin Zhang1, Wen-Sheng Dong1, Kang Li1
1Department of Geriatrics, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan, China.
JACC. Basic to translational science
|June 4, 2025
概括
含有4 (FNDC4) 域的III型纤维肌肉素4 (FNDC4) 的下降会损害衰老的心脏功能. 恢复FNDC4可以通过激活关键代谢通路来改善线粒体健康和心脏功能.
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
- 衰老研究研究 衰老研究
背景情况:
- 线粒体功能障碍是心脏衰老的标志,影响心脏平衡和氧化代谢.
- 含有4 (FNDC4) 位域的III型纤维肌菌素与线粒体生物发生和代谢调节有关.
- 在老年心脏中观察到FNDC4水平降低,与心脏功能受损相关.
研究的目的:
- 研究FNDC4在与年龄有关的心脏功能障碍中的作用.
- 阐明FNDC4影响心脏衰老的分子机制.
- 确定FNDC4在缓解心脏衰老方面的治疗潜力.
主要方法:
- 在年轻和老年小鼠中对FNDC4水平的比较分析.
- 产生心脏特异性的FNDC4过度表达和敲击鼠标模型.
- 使用已确定的生理和组织学技术评估心脏功能和重塑.
- 转录组和代谢组分析以确定FNDC4调节的途径.
主要成果:
- 老年小鼠显示心脏和血FNDC4水平显著降低.
- 心脏特异性的FNDC4过度表达改善了与衰老相关的心脏重塑和功能障碍.
- 特定于心脏的FNDC4倒置加剧了与衰老有关的心脏病理.
- 确定了AMP激活蛋白激酶α/氧酶增殖器激活受体α信号通路的FNDC4激活.
- 这一途径改善了线粒体功能障碍,并降低了老年心脏中的脂毒性.
结论:
- FNDC4对与年龄有关的心脏功能障碍起着保护作用.
- 通过AMPKα/PPARα通路增强线粒体功能和代谢平衡,FNDC4减轻心脏衰老.
- 针对FNDC4代表了与年龄相关的心脏病的潜在治疗策略.
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