线粒体应激通过NuRD成分LIN-40的光调节来调节染色体重塑和寿命
Jun Zhou1, Di Zhu1, Yibing Wang1,2
1Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
Science China. Life sciences
|August 14, 2025
概括
线粒体应激通过NuRD复合体改变染色质重塑而影响衰老. 这项研究揭示了LIN-40脱化如何激活细胞弹性并延长寿命.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 衰老研究研究 衰老研究
背景情况:
- 线粒体功能障碍是衰老的一个关键特征.
- 在细胞应激期间染色质重塑的协调还不清楚.
研究的目的:
- 研究将线粒体压力与染色体重塑联系在一起的机制.
- 确定NuRD综合体及其组件在这个过程中的作用.
主要方法:
- 使用Caenorhabditis elegans作为一个模型生物.
- 研究了线粒体应激下LIN-40的酸化状态.
- 研究了LIN-40和转录因子DVE-1之间的相互作用.
- 分析了LIN-40变种对寿命的影响.
主要成果:
- 线粒体应激会诱导Lin-40的脱化,这是NuRD复合物的组成部分.
- 脱化LIN-40增强了与DVE-1的相互作用,激活了线粒体未折叠蛋白质反应 (UPR) 和染色质重塑.
- 在p38 MAPK路径 (PMK-3) 中介的LIN-40酸化,而PP1c (GSP-2) 逆转它.
- 一种特定的LIN-40变体 (T654D) 废除了因线粒体压力引起的寿命延长.
结论:
- 通过NuRD复合体建立了线粒体应激信号与染色体重塑之间的直接联系.
- 证明LIN-40充当了一个关键的调解者,将线粒体健康与细胞反应和生物长寿联系起来.
- 突出了协调细胞弹性和寿命延长的进化保存机制.
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