在高空暴露后,MOTS-c通过促进线粒细胞吸收来减轻心脏功能障碍
Zihang Feng1, Yuan Xing2, Jing Lou3
1Key Laboratory of Aerospace Medicine of the Ministry of Education, School of Aerospace Medicine, Fourth Military Medical University, Xi'an 710032, China; Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China.
Free radical biology & medicine
|February 7, 2026
概括
由于线粒体问题和缺乏MOTS-c,高海拔暴露会导致持久的心脏功能障碍. 补充MOTS-c (12S核糖体RNA类型-c的线粒体开放读取框架) 可以在去适应过程中保护心脏.
科学领域:
- 心血管生理学心血管生理学
- 线粒体生物学 线粒体生物学
- 高度医学 高度医学
背景情况:
- 高海拔 (HA) 暴露会诱导心脏变化,在返回较低海拔时很难逆转.
- 暴露于HA后心脏脱适应的机制尚未完全理解.
- 在HA后观察到持续的心脏功能障碍和线粒体损伤.
研究的目的:
- 为了研究HA暴露后持续性心脏功能障碍背后的机制.
- 探索12S核糖体RNA类型-c (MOTS-c) 的短线粒体开放阅读框架在心脏去适应中的作用.
- 评估MOTS-c在缓解HA诱导的心脏功能障碍方面的治疗潜力.
主要方法:
- 小鼠被暴露在模拟的6000米高度10天,然后10天的400米的去适应.
- 评估了心脏功能,线粒体功能和MOTS-c水平.
- 用MOTS-c补充剂和Pink1基因沉默来研究分子通路.
主要成果:
- 心脏功能障碍在去适应过程中持续存在,与线粒体功能障碍和MOTS-c缺乏有关.
- 外源MOTS-c的使用通过激活Pink1/Parkin通路并促进线粒细胞衰变,改善了心脏功能和线粒体质量.
- 在患有高空心脏病和急性冠状动脉综合征的患者中发现了MOTS-c水平的降低.
结论:
- 由于持续的MOTS-c缺乏,HA暴露会导致心脏功能障碍的"记忆".
- MOTS-c对于通过线粒体细胞衰变来维持线粒体质量至关重要.
- 在去适应过程中,MOTS-c代表了HA诱导的心脏功能障碍的潜在治疗标.
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