MicroRNA-22 Targeting CBP Protects Against Myocardial Ischemia-reperfusion Injury Through Anti-apoptosis in Rats

Overview

Journal Mol Biol Rep

Specialty Molecular Biology

Date 2013 Dec 17

PMID 24338162

Citations 35

Authors

Jian Yang

Lihua Chen

Jun Yang

Jiawang Ding

Song Li

Hui Wu

Jing Zhang

Zhixing Fan

Wusong Dong

Xinxin Li

Affiliations

Soon will be listed here.

Abstract

MicroRNAs are extensively involved in the pathogenesis of major cardiovascular diseases by suppressing target gene expression. Recent studies have reported that microRNA-22 (miR-22) may be implicated in ischemia-reperfusion (I/R) induced myocardial injury. However, the specific function of miR-22 in myocardial I/R injury is far from clear nowadays. The present study was designed to determine the role of miR-22 in myocardial I/R injury and investigate the underlying cardio-protective mechanism. The rat myocardial I/R injury model was induced by occluding the left anterior descending coronary artery for 30 min followed by 12 h reperfusion. As predicted, adenovirus-mediated miR-22 overexpression markedly reduced the release of creatine kinase and lactate dehydrogenase, infarct size and cardiomyocytes apoptosis. Moreover, CREB binding protein (CBP) as a potential miR-22 target by bioinformatics was significantly inhibited after miR-22 transfection. We also found that p53 acetylation activity, pro-apoptotic related genes Bax and p21 levels were all decreased associated with the down-regulation of CBP. In conclusion, our data demonstrate that miR-22 could inhibit apoptosis of cardiomyocytes through one of its targets, CBP. Thus, miR-22 may constitute a new therapeutic target for the prevention of myocardial I/R injury.

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