MiR-92a Promotes Apoptosis in Rats with Myocardial Ischemia-Reperfusion Injury via Regulating Wnt/β-Catenin Pathway

In this study, the impact of micro ribonucleic acid (miR)-92a on rats with myocardial ischemia-reperfusion injury was investigated, with a focus on its regulation of the Wnt/β-catenin pathway. A total of 36 Sprague Dawley rats were divided into three groups: a sham operation group, a model group, and a miR-92a antagomir group. The sham group underwent thoracotomy without injury, while the model and miR-92a antagomir groups were subjected to myocardial ischemiareperfusion injury and treated with saline and miR-92a antagomir, respectively. Results showed that the myocardial infarction area was significantly reduced in the miR-92a antagomir group compared to the model group. Histological analysis revealed improved myocardial tissue structure in the miR-92a antagomir group. Western blotting demonstrated elevated levels of p-GSK-3β and β-catenin in both the model and miR-92a antagomir groups, with a notable decrease in the miR-92a antagomir group compared to the model group. Additionally, miR-92a expression was higher in both the model and miR-92a antagomir groups compared to the sham group. Lastly, apoptosis rates were increased in both the model and miR-92a antagomir groups, but significantly reduced in the miR-92a antagomir group compared to the model group. Overall, these findings suggest that miR-92a exacerbates apoptosis in rats with myocardial ischemia-reperfusion injury by up-regulating the Wnt/β-catenin signaling pathway.