伴侣介导的自会操纵PGC1α的稳定性,并在热应力下控制能量代谢
Yixiao Zhuang1, Xinyi Zhang1, Shuang Zhang1
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, 200438, China.
Nature communications
|May 13, 2025
概括
伴侣介导的自 (CMA) 在热应力期间调节热源蛋白PGC1α的稳定性. PARK7蛋白控制CMA活性,影响棕色脂肪组织 (BAT) 功能和代谢健康.
科学领域:
- 细胞生物学 细胞生物学
- 代谢过程中的代谢.
- 蛋白质降解 蛋白质降解
背景情况:
- 像PGC1α这样的热生成蛋白对能量消耗至关重要,但在热应力下下调.
- 在热应力期间控制PGC1α稳定的精确分子机制尚未完全理解.
- 伴侣介导的自 (CMA) 是蛋白质稳定性的潜在调节者.
研究的目的:
- 研究CMA在调节热应力下PGC1α稳定性的作用.
- 确定参与棕色脂肪组织 (BAT) 中CMA介导的PGC1α调节的分子参与者.
主要方法:
- 在BAT中使用了鼠标模型,对Lamp2a (CMA组件) 进行了淘汰.
- 采用了BAT的蛋白质组学,结构预测,共免疫沉质谱和生物化学分析.
- 研究了PARK7在调节CMA活动中的功能及其对BAT代谢的影响.
主要成果:
- 在BAT中Lamp2a的淘汰增加了PGC1α蛋白水平,改善了代谢表型.
- PARK7被确定为一个与LAMP2A和HSC70相互作用的温度传感器,以调节CMA活动.
- 在BAT中Park7淘汰导致BAT白化,胰岛素敏感性受损,并在热中立下减少能源消耗.
- 通过LAMP2A敲击抑制CMA可以逆转Park7消灭的效果.
结论:
- 通过降解PGC1α,CMA对于在热中性期间维持棕色脂肪组织功能至关重要.
- PARK7在感知温度和调节CMA活动方面发挥着关键作用,从而影响BAT热生成和代谢健康.
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