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Zheng W, Xie Q, Zhang Z, Li J, Fang L, Li W. Inhibited HDAC3 or Elevated MicroRNA-494-3p Plays a Protective Role in Myocardial Ischemia-Reperfusion Injury via Suppression of BRD4. Mol Neurobiol 2021; 58:4268-4279. [PMID: 33982231 DOI: 10.1007/s12035-021-02369-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 03/22/2021] [Indexed: 11/29/2022]
Abstract
Increased histone deacetylase 3 (HDAC3) has been demonstrated to contribute to the pathogenesis of myocardial ischemia-reperfusion injury (MI/RI). Therefore, the goal of this study was to investigate how HDAC3 regulated MI/RI by mediating microRNA (miR)-494-3p/dromodomain-containing protein 4 (BRD4) axis. The MI/RI model was established by ligating the right anterior descending coronary artery. Cardiomyocytes from newborn mice were treated with hypoxia/reoxygenation (H/R). Gain-of-function and loss-of-function approaches were implemented to figure out the roles of miR-494-3p and HDAC3 in MI/RI. miR-494-3p, HDAC3, and BRD4 in myocardial tissues of mice with MI/RI and H/R-treated cardiomyocytes were detected. The relationships between miR-494-3p and HDAC3 and BRD4 were identified. Reduced miR-494-3p and upregulated HDAC3 and BRD4 exhibited in myocardial tissues of mice with MI/RI and H/R-treated cardiomyocytes. Inhibited HDAC3 or elevated miR-494-3p repressed the inflammation and apoptosis, improved cardiac function, and ameliorated myocardial injury in myocardial tissues of mice with MI/RI. Suppression of HDAC3 or elevation of miR-494-3p depressed inflammation and apoptosis and promoted cell viability of primary cardiomyocytes. miR-494-3p targeted BRD4. The study concludes that suppressed HDAC3 plays a protective role in MI/RI by upregulation of miR-494-3p and inhibition of BRD4, which could be helpful for MI/RI therapy.
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Affiliation(s)
- Wuyang Zheng
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361000, Fujian, China
| | - Qiang Xie
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361000, Fujian, China
| | - Ziguan Zhang
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361000, Fujian, China
| | - Jun Li
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361000, Fujian, China
| | - Lihuan Fang
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361000, Fujian, China
| | - Weihua Li
- Department of Cardiology, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Road, Siming District, Xiamen, 361000, Fujian, China.
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