CD36通过慢性综合应激反应调节肌体分化 - - 对肌肉衰老的影响
Xin Ye1,2, He-Qiang Jia1, Chen Yuan1
1Department of Pathology, College of Basic Medicine, Beihua University, Jilin, 132013, Jilin, P.R. China.
Journal of muscle research and cell motility
|January 22, 2026
概括
分化36集群 (CD36) 通过与综合应激反应 (ISR) 和线粒体展开蛋白质反应 (UPR) 相互作用,影响肌肉细胞分化,提供潜在的肉症治疗方法.
科学领域:
- 肌肉生物学 肌肉生物学
- 细胞应激反应细胞应激反应
- 线粒体动力学的动态
背景情况:
- 综合应激反应 (ISR) 和线粒体展开蛋白质反应 (UPR) 对于肌肉卫星细胞的分化至关重要.
- 老化肌肉表现出受损的分化,增加的CD36表达和CD36.的线粒体局部化.
- 在分化过程中CD36和ISR/UPRmt之间的相互作用仍然不太清楚.
研究的目的:
- 研究CD36在肌体分化中的作用.
- 阐明肌肉细胞分化过程中CD36,ISR和UPR之间的关系.
- 为了探索针对CD36治疗肉症的潜力.
主要方法:
- 在分化的第3天,C2C12髓母细胞中的CD36敲除.
- 对ISR相关蛋白质 (例如ATF4) 和UPR相关蛋白质 (例如ATF5,HSP60,HSP10) 的分析.
- 评估肌原性标记物 (Myogenin,Myh1),线粒细胞核蛋白平衡,以及线粒体功能.
- 在衰老的肌肉中研究CD36和mTOR相互作用.
主要成果:
- CD36敲击降低了ISR蛋白质水平 (ATF4),但增加了UPR蛋白质水平 (ATF5,HSP60,HSP10).
- 肌源性差异化标志物显示出混合的结果:肌源素增加,但CD36击倒后Myh1表达减少.
- CD36的淘汰导致了线粒细胞核蛋白失衡和线粒体功能障碍.
- CD36与衰老肌肉中的mTOR相互作用,并定位到线粒体.
结论:
- CD36在老化肌肉中的线粒体局部化,并在C2C12细胞的早期肌体分化过程中影响ISR和UPR.
- CD36调节会影响应激反应通路和肌源性标记物的关键蛋白质.
- 线粒体功能障碍和线粒体核不平衡发生在CD36敲击后.
- CD36与mTOR的相互作用及其在压力反应中的作用表明了对萨尔科佩尼亚的潜在治疗影响.
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