ABSTRACT
Objective To investigate the effect of soluble receptor for advanced glycation end-products (sRAGE) on inflammation in myocardial ischemia/reperfusion ( I/R ) mice and its mechanism. Methods Myocardial I/R injury model was conducted by left anterior descending ligation for 30 minutes and reperfusion for 2 weeks in male C57BL/6 mice aged 6-8 weeks. The mice were randomly divided into four groups with five C57BL/6 mice in each group. The cardiac function was detected by echocardiography, the inflammatory cells infiltration was observed by HE staining, the myocardial fibrosis was detected by Masson and Sirius red staining, the expression of galectin-3 was detected by immunohistochemical staining. Results Compared with the sham group, the cardiac function decreased, the inflammatory cells infiltrated increased among the myocardial tissue, the percentage of myocardial fibrosis area increased, and the expression of galectin-3 increased in I/R groups. After exogenous sRAGE treatment, the cardiac function of mice was significantly improved, the inflammatory cells infiltration decreased, the myocardial fibrosis area decreased, and the expression of galectin-3 decreased as well. Conclusion sRAGE may reduce inflammatory cells infiltration in mice heart by inhibiting the expression of galectin-3, and then alleviating myocardial fibrosis during myocardial ischemia/reperfusion injury.