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MicroRNA-98 attenuates cardiac ischemia-reperfusion injury through inhibiting DAPK1 expression.

IUBMB Life 2018 November 13
Cardiovascular ischemic disease is a large class of diseases that are harmful to human health. The significant role of microRNAs (miRNAs) in terms of controlling cardiac injury has been reported in latest studies. MiR-98 is very important in regulating the apoptosis, the differentiation, the growth as well as the metastasis of cells. Nevertheless, the effect of miR-98 in the cardiac ischemia reperfusion (I/R) injury has rarely been investigated. In the current research, we found that the miR-98 expression was down-regulated in the cardiomyocytes subjected to hypoxia/reoxygenation (H/R) and in the myocardium of the I/R rats. In addition, over-expression of miR-98 could significantly reduce the myocardial oxidative stress and ischemic injury as well as cell apoptosis. In agreement, similar findings were demonstrated in H9c2 cells subjected to H/R injury. Bioinformatic analysis using MiRanda and TargetScan and luciferase activity assay confirmed death-associated protein kinase 1 (DAPK1) as a direct target of miR-98. These findings suggest that miR-98 may be exploited as a novel molecular marker or therapeutic target for myocardial I/R injury. © 2018 IUBMB Life, 1-11, 2018.

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