1. Academic Validation
  2. Hypoxia Acclimation Protects against Heart Failure Postacute Myocardial Infarction via Fundc1-Mediated Mitophagy

Hypoxia Acclimation Protects against Heart Failure Postacute Myocardial Infarction via Fundc1-Mediated Mitophagy

  • Oxid Med Cell Longev. 2022 Apr 5;2022:8192552. doi: 10.1155/2022/8192552.
Qin Li 1 Yinghai Liu 1 Qingqing Huang 1 Xiaobo Yi 1 Fuen Qin 1 Zuling Zhong 1 Lu Lin 1 Haihong Yang 1 Gu Gong 1 Wei Wu 1
Affiliations

Affiliation

  • 1 Department of Anesthesiology and Pain Medicine, The General Hospital of Western Theater Command, Sichuan, Chengdu, China.
Abstract

Mitochondrial dysfunction is the main cause of heart failure (HF) postacute myocardial infarction (AMI). Hypoxia acclimation (HA) reduces efficiently the area of AMI caused by ischemia and/or reperfusion and delays HF. Here, we examined whether HA improves mitochondrial structure and function through the hypoxic Autophagy receptor FUNDC1 to prevent HF post-AMI. Male adult mice were acclimated in a low-pressure hypoxic animal chamber (11% oxygen (O2)) for 8 h/day for 28 days, and then, an induced HF post-AMI model via left anterior descending (LAD) artery ligation was structured to explore the efficacy and mechanism of HA. Our results showed that HA exposure can improve cardiac structure and function in mice with HF post-AMI and protected myocardial mitochondrial morphology and function. Further studies showed that HA increased the expression of Fundc1 protein and its associated Mitophagy protein LC3 in myocardial tissue after infarction. We then established a cellular model of oxygen glucose deprivation (OGD) in vitro, and knockdown of FUNDC1 attenuated the protective effect of HA exposed on cardiomyocyte mitochondria and increased cardiomyocyte Apoptosis. In conclusion, the protective effect of HA on HF post-AMI is achieved by regulating Fundc1-mediated Mitophagy in myocardial tissue. FUNDC1-mediated Mitophagy could be a promising strategy to treat cardiovascular diseases, including HF.

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