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亚细胞蛋白质组分析显示,在小鼠心脏中REEP5的敲击破坏了线粒体网络
Michelle Di Paola1, Cristine J Reitz1, Uros Kuzmanov1
1Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, Toronto, ON M5G 1M1, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON M5S 1M8, Canada.
Molecular & cellular proteomics : MCP
|February 11, 2026
概括
受体表达增强蛋白5 (REEP5) 损失会破坏心脏细胞线粒体和通信. REEP5的淘汰会导致线粒体碎片化和氧化应激,影响心肌细胞功能.
科学领域:
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 受体表达增强蛋白5 (REEP5) 是一种心脏蛋白质,对体内质网膜 (SR/ER) 结构和心肌细胞功能至关重要.
- 它在器官间通信和线粒体平衡中的作用尚未完全理解.
研究的目的:
- 调查REEP5在调节心脏器官恒温和器官间通信中的功能.
- 在REEP5损失时定义SR/ER,线粒体和细胞质中的蛋白质变化.
主要方法:
- 重组腺相关病毒9型血清 (rAAV9) 介导的小RNA对小鼠心中的Reep5进行敲除.
- 亚细胞分离与数据独立采集质谱学 (DIA-MS) 相结合.
- 心肌细胞成像评估线粒体形态和反应性氧物种 (ROS).
主要成果:
- REEP5损失改变了SR/ER膜蛋白组成,并对RTN4,ATL3和CKAP4进行了补偿上调.
- 蛋白质组分析揭示了微小体,线粒体和细胞系的广泛重组,包括改变的氧化还原适应和蛋白质稳定.
- 观察到线粒体碎片化,ROS增加,以及线粒体相关膜 (MAMs) 上汇聚的通路的失调.
结论:
- REEP5是心脏器官恒温的关键调节者.
- 失去REEP5会破坏线粒体的完整性,促进氧化应激,并损害器官间的通信,特别是SR/ER和线粒体之间的通信.
- 这些发现凸显了REEP5在维持心肌细胞功能和SR/ER-线粒体交叉语音方面的重要性.
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