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针对miR-493-5p/OTUB1轴以减轻糖尿病心肌病中的线粒体功能障碍

Xiaodan Zhong¹, Yu Li¹, Yang Xie²

¹Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China; Hubei Provincial Engineering Research Center of Vascular Interventional Therapy, Wuhan, 430030, Hubei, China.

European journal of pharmacology

|July 17, 2025

概括

活性蛋白C (aPC) 通过降低 miR-493-5p 的调节来保护糖尿病心肌病,从而增加 OTUB1 水平并改善线粒体功能. 这一途径为糖尿病心脏病提供了潜在的治疗点.

科学领域:

心血管生物学心血管生物学
代谢性疾病研究研究
线粒体医学线粒体医学

背景情况:

糖尿病心肌病 (DCM) 是糖尿病的一种严重并发症,经常导致心力衰竭.
双基因酶OTUB1在DCM中表现出保护作用,但其上游调节和对线粒体的影响尚未完全理解.

研究的目的:

研究活性蛋白C (aPC) 在早期糖尿病心肌病中调节OTUB1表达中的作用.
阐明aPC在DCM中影响线粒体功能和心脏健康的机制.
评估针对miR-493-5p/OTUB1轴的治疗潜力.

主要方法:

使用短期胰岛素开放的糖尿病小鼠模型与外源蛋白C (PC) 补充.
雇佣了血栓模块素突变 (TM^Pro/Pro) 的小鼠进行内源性PC激活的长期评估.
通过重组腺相关病毒 (rAAV) 输送一个microRNAmiR-493-5p海绵,以抑制miR-493-5p.

主要成果:

外源PC在早期DCM中保留了心脏功能,并恢复了OTUB1蛋白.
TM^Pro/Pro小鼠显示心脏功能障碍恶化和OTUB1蛋白减少.
确定miR-493-5p是OTUB1的直接转化抑制剂,在糖尿病患者的心脏中升调,由aPC降调.
在糖尿病小鼠中,抑制miR-493-5p恢复了OTUB1,改善了线粒体功能,并增强了心脏功能.

结论:

aPC/miR-493-5p/OTUB1轴是糖尿病心肌病发病的关键调节器.
准这个轴对维护线粒体完整性和预防糖尿病心脏功能障碍充满希望.

关键词:

激活蛋白C是一种活性蛋白.糖尿病心肌病糖尿病心肌病线粒体功能障碍线粒体功能障碍 OTUB1 在线播放在 miR-493-5p 中.

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