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国际美丁₁_-₅₃通过线粒体SIRT3介导的SOD2脱乙化来改善与衰老相关的心脏重塑和功能障碍

Deng-Ren Ji¹, Rui Chang², Shi-Meng Liu¹

¹Laboratory of Cardiovascular Bioactive Molecule, School of Basic Medical Sciences, Peking University, Beijing 100083, China; State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing 100083, China; Department of Pathogen Biology, School of Basic Medical Sciences, Peking University, Beijing 100083, China.

Journal of molecular and cellular cardiology

|July 2, 2025

概括

通过改善线粒体健康,Intermedin1-53 (IMD1-53) 的使用有效地缓解了与衰老相关的心脏重塑和功能障碍. 这种可以向Sirtuin 3 (SIRT3),以减少氧化应激,并保护老化的心脏.

科学领域:

心血管生物学心血管生物学
衰老研究研究衰老研究
线粒体医学线粒体医学

背景情况:

与衰老相关的心脏重塑 (AACR) 涉及过度缩小,纤维化和功能障碍,由血管素II (Ang II) 和压力过载加剧.
在老年心脏中观察到内源性介质1-53 (IMD1-53) 的降低水平,心脏问题恶化.

研究的目的:

研究IMD1-53在减轻老年小鼠AACR和心脏功能障碍方面的作用和机制.
探索线粒体Sirtuin 3 (SIRT3) 在IMD1-53的保护作用中的参与.

主要方法:

老年小鼠接受了Ang II输液或横腹动脉收缩 (AAC) 手术.
IMD1-53是用皮下给老年小鼠的.
用Ang II刺激心肌细胞,并在体外用IMD1-53进行治疗.
使用SIRT3倒置和删除模型.
研究了关键的信号通路 (PI3K/Akt,cAMP/PKA,AMPK).

主要成果:

在压力下的老年小鼠中,IMD1-53水平下降,而心脏功能障碍,高和纤维化恶化.
服用IMD1-53可以逆转这些有害变化,改善线粒体功能 (SIRT3,SOD2活性,ATP产生).
通过上调SIRT3和减少氧化应激,IMD1-53保护心肌细胞免受Ang II诱导的损伤,这些效应取决于SIRT3.

结论:

IMD1-53有效地缓解了AACR和心脏功能障碍,这些障碍因Ang II或压力过载而加剧.
保护机制涉及通过SIRT3介导的SOD2脱乙烯化来改善线粒体的氧化应激.
IMD1-53的作用通过其受体进行介导,并涉及PI3K/Akt,cAMP/PKA和AMPK信号通路.

关键词:

衰老的衰老衰老的衰老 ангиотензин II 的使用.心脏功能是如何工作的进行心脏重塑.在此期间 ((153))线粒体中的线粒体.压力过载的压力过载.在 Sirtuin 3 中,有3个字母.

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