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Qiu L, Xu C, Xia H, Chen J, Liu H, Jiang H. Downregulation of P300/CBP-Associated Factor Attenuates Myocardial Ischemia-Reperfusion Injury Via Inhibiting Autophagy. Int J Med Sci 2020; 17:1196-1206. [PMID: 32547315 PMCID: PMC7294925 DOI: 10.7150/ijms.44604] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 04/27/2020] [Indexed: 12/17/2022] Open
Abstract
Cardiomyocyte autophagy plays an important role in myocardial ischemia-reperfusion injury (MIRI). P300/CBP-associated factor (PCAF) was involved in the regulation of autophagy. However, the role of PCAF in MIRI is currently unknown. This study was to investigate whether downregulation of PCAF attenuate MIRI. The results showed that the expression of PCAF was significantly increased in MIRI in vivo and in vitro. Downregulation of PCAF not only inhibited autophagy and damage of H9c2 cells induced by hypoxia-reoxygenation, but also reduced autophagy and myocardial infarct size during myocardial ischemia-reperfusion in rats. In addition, downregulation of PCAF promoted activation of PI3K/Akt/mTOR signaling pathway in cardiomyocytes during hypoxia-reoxygenation. Wortmannin, a PI3K/Akt inhibitor, could abrogate the effects of downregulation of PCAF on cardiomyocytes autophagy. These results demonstrated that downregulation of PCAF alleviated MIRI by inhibiting cardiomyocyte autophagy through PI3K/Akt/mTOR signaling pathway. Thus, PCAF may be a potential target for prevention and treatment of MIRI.
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Affiliation(s)
- Liqiang Qiu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, China
| | - Changwu Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, China
| | - Hao Xia
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, China
| | - Jing Chen
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, China
| | - Huafen Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Hong Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, China.,Cardiovascular Research Institute, Wuhan University, Wuhan 430060, China.,Hubei Key Laboratory of Cardiology, Wuhan 430060, China
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