[No authors listed]
Myocardial ischemia-reperfusion (I/R) injury, a major contributor to morbidity and mortality, represents a combination of intrinsic cellular response to ischemia and the extrinsic acute inflammatory response. In the present study, microarray analysis of GSE67308 and GSE50885 identified differentially expressed GPR30 and upstream regulatory miR-2861 and miR-5115 in myocardial I/R. Furthermore, GPR30 was confirmed as a common target gene of miR-2861 and miR-5115, and miR-2861 and miR-5115 inhibited GPR30 expression. Poor expression of GPR30 was identified in the myocardial I/R injury mouse model. Overexpressed GPR30 led to alleviated the pathological conditions, diminished myocardial infarct size and apoptosis of myocardial tissue in mice. Moreover, miR-2861 and miR-5115 were found to be highly expressed in the myocardial I/R injury mouse model and to subsequently accelerate the disease progression. Notably, PR30 curtailed the development of myocardial I/R injury through activation of the mTOR signaling pathway. The key findings suggested that miR-2861 and miR-5115 blocked the activation of the GPR30/mTOR signaling pathway by targeting GPR30, thereby accelerating myocardial I/R injury in mice.
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