溶解体通过依赖mTORC1的ATF4酸化调节线粒体的UPR
Terytty Yang Li1,2, Qi Wang3, Arwen W Gao3,4
1State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Metabolic Remodeling and Health, Laboratory of Longevity and Metabolic Adaptations, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai, China. teryttyliyang@fudan.edu.cn.
Cell discovery
|September 7, 2023
概括
溶解体通过真空H+-ATPase (v-ATPase) 和mTORC1信号,激活线粒体的应激反应. 这一过程涉及ATF4酸化,对线粒体健康和细胞存活至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 溶解体是宏分子降解和信号集成的关键器官.
- lysosomes 在调解线粒体应激反应 (MSR) 中的作用尚不清楚.
研究的目的:
- 研究溶解体在线粒体应激反应 (MSR) 中的作用.
- 阐明将 lysosomal 功能与线粒体应激适应联系起来的信号通路.
主要方法:
- 使用真空H+-ATPase (v-ATPase) 活性研究了 lysosomal 酸化.
- 使用了拉巴胺素复合物1 (mTORC1) 和ATF4酸化试验的机械标.
- 评估了线粒体展开蛋白反应 (UPRmt) 和UPRER.
- 分析了线粒体氧化还原稳定和细胞死亡.
主要成果:
- 通过v-ATPase的溶解体酸化对于UPRmt转录激活至关重要.
- 线粒体应激激活了v-ATPase介导的mTORC1信号,导致ATF4酸化.
- 这条路径的破坏会阻断UPRmt,但不会阻断UPRER.
- 酸化ATF4对于维持线粒体的氧化还原平衡和防止ROS诱导的细胞死亡至关重要.
结论:
- 溶解体通过v-ATPase/mTORC1信号传递作为线粒体应激反应的关键调解者.
- v-ATPase/mTORC1-依赖的ATF4酸化将 lysosomal 功能与UPRmt激活联系在一起.
- 这一途径对于细胞抵抗线粒体压力和ROS诱导的损伤的抵抗力至关重要.
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