除了核之外:ATM-CHEK2轴感知mtROS,以协调线粒细胞的发生
Qi-Qiang Guo1,2, Xiao-Yu Song1,2, Liu Cao1,2,3
1The College of Basic Medical Science, Health Sciences Institute, China Medical University, Shenyang, Liaoning Province, China.
Autophagy
|November 19, 2025
概括
线粒体活性氧物种 (mtROS) 是必不可少的信号分子,而不仅仅是有害的副产品. 它们激活保护性通路,包括DNA损伤反应和髓,以维持细胞平衡.
科学领域:
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
- 压力反应应激反应
背景情况:
- 线粒体反应性氧物种 (mtROS) 传统上被认为是细胞压力的有害副产品.
- 新出现的证据表明mtROS在细胞信号传递中的作用更为复杂.
研究的目的:
- 阐明mtROS作为信号分子在激活保护性适应性反应中的基本作用.
- 确定参与mtROS介导细胞保护的特定信号通路和分子参与者.
主要方法:
- 研究了mtROS在激活ATM-CHEK2DNA损伤反应途径中的作用.
- 通过mtROS信号传递检查了PINK1-PRKN/帕金金依赖性线粒的协调.
- 分析了CHEK2介导的酸化事件,这些酸化事件发生在关键的食相关蛋白质 (ATAD3A,OPTN,BECN1) 上.
主要成果:
- 确定mtROS是ATM-CHEK2DNA损伤反应途径的特定触发器.
- 这一途径被证明可以协调PINK1-PRKN/帕金因依赖性线粒.
- 通过mtROS激活CHEK2,导致ATAD3A,OPTN和BECN1的酸化,调节线粒细胞衰变的启动和进展.
结论:
- 揭示了一种新的mtROS驱动的信号级联,其中mtROS充当必要的信号分子.
- 证明ATM-CHEK2途径整合了基因组和线粒体的压力信号.
- 扩展了ATM-CHEK2通路的已知功能,超越了核DNA损伤,包括通过线粒体菌的线粒体质量控制.
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