Mitophagy-regulated mitochondrial health strongly protects the heart against cardiac dysfunction after acute myocardial infarction.

Mitophagy-regulated mitochondrial health strongly protects the heart against cardiac dysfunction after acute myocardial infarction.
复制标题

线粒体自噬调节的线粒体健康强有力地保护心脏免受急性心肌梗死后的心功能障碍。

DOI:
10.1111/jcmm.17190
复制
发表时间:
2022-03
影响因子:
5.3
通讯作者:
Zheng M
Zheng M
中科院分区:
医学2区
文献类型:
--
作者:
Xu C;Cao Y;Liu R;Liu L;Zhang W;Fang X;Jia S;Ye J;Liu Y;Weng L;Qiao X;Li B;Zheng M

文献摘要

参考文献

相似文献

自噬包括线粒体自噬是维持心肌细胞内环境稳定和保护心肌免受心肌梗死(MI)损伤的重要调节机制。本研究旨在探讨心肌梗死后一般性自噬和特异性线粒体自噬对心功能的调节作用。通过使用Beclin 1 +/−、Fundc 1敲除(KO)和Fundc 1转基因(TG)小鼠模型,结合饥饿和MI模型,我们发现Fundc 1 KO在MI后引起比Beclin 1 +/−更严重的线粒体和心功能障碍损伤。有趣的是,Beclin 1 +/−导致总自噬显著减少,而没有可检测到的线粒体自噬变化,Fundc 1 KO显著抑制线粒体自噬,但没有改变总自噬活性。相比之下,饥饿增加总自噬而不改变线粒体自噬,而Fundc 1 TG升高小鼠心脏中的总自噬和线粒体自噬。因此,Fundc 1 TG对MI后的保护作用比饥饿强得多。此外,Beclin 1 +/−/Fundc 1 TG显示总自噬和线粒体自噬增加至与Fundc 1 TG本身相当的水平,并完全逆转了Beclin 1 +/− −引起的MI后线粒体和心脏损伤加重。我们的研究结果表明,线粒体自噬,而不是一般的自噬主要通过调节线粒体功能的心脏保护作用。
Autophagy including mitophagy serves as an important regulatory mechanism in the heart to maintain the cellular homeostasis and to protect against heart damages caused by myocardial infarction (MI). The current study aims to dissect roles of general autophagy and specific mitophagy in regulating cardiac function after MI. By using Beclin1+/−, Fundc1 knockout (KO) and Fundc1 transgenic (TG) mouse models, combined with starvation and MI models, we found that Fundc1 KO caused more severe mitochondrial and cardiac dysfunction damages than Beclin1+/− after MI. Interestingly, Beclin1+/− caused notable decrease of total autophagy without detectable change to mitophagy, and Fundc1 KO markedly suppressed mitophagy but did not change the total autophagy activity. In contrast, starvation increased total autophagy without changing mitophagy while Fundc1 TG elevated total autophagy and mitophagy in mouse hearts. As a result, Fundc1 TG provided much stronger protective effects than starvation after MI. Moreover, Beclin1+/−/Fundc1 TG showed increased total autophagy and mitophagy to a level comparable to Fundc1 TG per se, and completely reversed Beclin1+/−‐caused aggravation of mitochondrial and cardiac injury after MI. Our results reveal that mitophagy but not general autophagy contributes predominantly to the cardiac protective effect through regulating mitochondrial function.
DOI: 10.1038/nm.3322
发表时间: 2013-11
期刊: Nature medicine
影响因子: 82.9
作者:
通讯作者: --
DOI: 10.1111/febs.14336
发表时间: 2018-04
期刊: The FEBS journal
影响因子: --
作者:
Rodger CE;McWilliams TG;Ganley IG
通讯作者: Ganley IG
DOI: 10.1016/j.molcel.2010.09.023
发表时间: 2010-10-22
期刊: Molecular cell
影响因子: 16
作者:
Kroemer G;Mariño G;Levine B
通讯作者: Levine B
DOI: 10.1089/ars.2010.3488
发表时间: 2011-06-01
影响因子: 6.6
作者:
Hariharan, Nirmala;Zhai, Peiyong;Sadoshima, Junichi
通讯作者: Sadoshima, Junichi
DOI: 10.1038/nrcardio.2017.35
发表时间: 2017-07
期刊: Nature reviews. Cardiology
影响因子: --
作者:
Delbridge LMD;Mellor KM;Taylor DJ;Gottlieb RA
通讯作者: Gottlieb RA