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DUSP1与VCP相互作用和脱,以改善线粒体质量控制,防止内毒素引起的心肌功能障碍
Hang Zhu1, Jin Wang2, Ting Xin3
1Senior Department of Cardiology, The Sixth Medical Center of People's Liberation Army General Hospital, Beijing, 100048, China.
Cellular and molecular life sciences : CMLS
|July 18, 2023
概括
双特异性酸酶1 (DUSP1) 通过维护线粒体质量控制,在内毒性期间保护心脏功能. DUSP1调节含瓦洛蛋白 (VCP) 酸化,减轻心脏损伤和炎症.
科学领域:
- 生物化学 生物化学
- 心血管生物学 心血管生物学
- 细胞生物学 细胞生物学
背景情况:
- 线粒体平衡对于心肌功能至关重要.
- 内氧化症会损害心脏功能和线粒体质量控制 (MQC).
- 双特异性酸酶1 (DUSP1) 和含瓦洛蛋白 (VCP) 在内毒素引起的心脏功能障碍中的作用尚未完全理解.
研究的目的:
- 调查DUSP1在LPS诱导的内毒症期间对MQC和心肌功能的影响.
- 阐明涉及DUSP1和VCP调节心脏MQC的分子机制.
主要方法:
- 在DUSP1转基因小鼠和DUSP1-过度表达HL-1心肌细胞中的LPS诱导的内毒性模型.
- 评估心脏结构,功能,炎症和亡.
- 分析线粒体动力学,线粒体,生物发生和线粒体展开的蛋白质反应.
- 分子测定以确定DUSP1-VCP相互作用和VCP酸化.
主要成果:
- 在内毒性病期间,野生类型小鼠的DUSP1表达下调.
- DUSP1过度表达减轻了心肌炎症,心肌细胞亡和心脏损伤,保持了心脏功能.
- DUSP1通过使线粒体动态正常化,改善线粒体,增强生物发生,减少线粒体未折叠蛋白质反应,在心肌细胞中保存了MQC.
- DUSP1在Ser784中脱化了VCP,这种相互作用主要发生在线粒体上.
- 一种相仿的VCP突变物取消了DUSP1的保护作用.
结论:
- DUSP1对内毒素引起的心肌功能障碍起着保护作用.
- DUSP1/VCP/MQC通路是一种涉及内毒素引起的心脏病理学的新机制.
- 针对DUSP1/VCP通路可能为内毒性相关的心脏病提供治疗策略.
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