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苏奇纳特通过通过SUCNR1/AMPK轴损害线粒体功能,使小鼠易患心房动
Yudi Zhang1, Haoyu Gong2, Lingyan Jin2
1Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University (XJTU), China; Department of Cardiology, Sir Run Run Shaw Hospital (SRRSH), Zhejiang University, China.
Redox biology
|March 3, 2025
概括
酸过载通过破坏线粒体功能和AMPK信号传递,使心房动 (AF) 和心脏重塑恶化. 这种代谢物可能是AF风险的潜在生物标志物.
科学领域:
- 心脏病学 心脏病学
- 代谢过程中的代谢.
- 线粒体生物学 线粒体生物学
背景情况:
- 心房动 (AF) 是一个与高死亡率和残疾相关的重大健康问题.
- 线粒体功能障碍越来越被认为是AF发展的关键因素.
- 在患有AF风险的患者中观察到高酸盐水平,但其作用尚不清楚.
研究的目的:
- 调查酸盐过载和AF病原体之间的关联.
- 为了确定酸盐对心房结构,功能和线粒体健康的影响.
主要方法:
- 已确立的AF敏感的小鼠模型 (肥胖,糖尿病) 和确认的循环糖酸盐升高.
- 给小鼠和隔离的心房细胞注射苏酸,以评估AF脆弱性和重塑.
- 检查了线粒体结构,氧化应激,SUCNR1表达和AMPK酸化.
- 使用AICAR (AMPK激活剂) 来评估其保护作用.
主要成果:
- 在小鼠中,酸过载显著增加了AF易感性,并诱导了不良心房重塑.
- 酸损害了心房线粒体结构,增加了氧化应激,改变了离子通道功能.
- 苏酸上调SUCNR1表达和降低AMPK酸化.
- 在小鼠中,AICAR治疗减轻了酸盐诱导的细胞重塑,并预防了AF.
结论:
- 酸过载通过损害线粒体功能和AMPK信号传递,加剧了AF脆弱性和心房重塑.
- 苏酸通过它的受体SUCNR1起作用,并影响AMPK通路.
- 酸盐是AF病变的低估因素,也是潜在的预测生物标志物.
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