肌肉特异性的PGC-1α通过调节Nrf2来调节老年肉症中的线粒体氧化应激
Lei Song1, Jianfeng Xue2, Lingfen Xu3
1Geriatric Medicine Department, Yantai Yuhuangding Hospital, Yantai 264000, China.
Experimental gerontology
|May 27, 2024
概括
氧酶增殖器激活受体马协激活剂-1α (PGC-1α) 在缓解与年龄相关的肌肉损失方面发挥着关键作用. 这项研究表明,PGC-1α通过调节核因素红色素2相关因子2 (Nrf2) 来调节线粒体的氧化应激.
科学领域:
- 线粒体生物学 线粒体生物学
- 骨肌肉生理学 骨肌肉生理学
- 衰老的研究研究.
背景情况:
- 衰老的sarcopenia涉及骨肌肉质量和力量的下降,线粒体功能障碍作为一个关键因素.
- 在线粒体反应性氧物种 (ROS) 中对过酶增殖器激活受体马协活性剂-1α (PGC-1α) 和老化骨肌中的核因素红色素2相关因子2 (Nrf2) 的作用的研究至关重要.
研究的目的:
- 分析PGC-1α对老化骨肌肉中的线粒体ROS和Nrf2的影响.
- 为了阐明PGC-1α和Nrf2之间的调节关系,在sarcopenia的背景下.
主要方法:
- 用7β-胆固醇 (7β-OHC) 治疗C2C12细胞核细胞以诱导氧化应激和PGC-1α调节.
- 使用siRNA或过度表达等离子体来改变PGC-1α表达,以评估对ROS和Nrf2的影响.
- 在野生类型和PGC-1α条件淘汰赛小鼠的研究中,研究了PGC-1α在肉症,Nrf2和CD38表达中的作用,其中二甲基酸被用作Nrf2激活剂.
主要成果:
- 在7β-OHC治疗或PGC-1α敲击下,PGC-1α和Nrf2表达减少,而PGC-1α过度表达减少了ROS和增加了Nrf2.
- 甲基酸盐治疗降低了治疗细胞和PGC-1α缺乏的小鼠中的ROS.
- 在老年小鼠中,肌肉特异性的PGC-1α缺乏症加剧了肉,减少了Nrf2和增加了CD38;甲改善了肌肉功能和减少了CD38.
结论:
- PGC-1α在缓解老年人肉症中线粒体氧化应激方面发挥着至关重要的作用.
- 通过调节Nrf2的表达和活性,PGC-1α调节线粒体的氧化应激.
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