• Department of Cardiovascular Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, P.R.China;
XUE Song, Email: xuesong64@163.com
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Objective To explore the effect of expression of miRNA-21 on bone marrow mesenchymal stem cells (BMSCs).Methods In this study, flow cytometry was used to identify the surface-associated antigens of BMSCs. The 10 μmol/L 5-azacytidine was used to induce BMSCs to differentiate to cardiomyocyte-like cells. Immunofluorescence was used to detect the expression of troponin I (cTnI). The samples were assigned to 3 groups: a blank group, a miRNA-21 mimic group, and a negative control (NC) group. The proliferation of BMSCs was detected by methyl thiazolylte-trazolium (MTT), the apoptosis of BMSCs was analyzed by flow cytometry. Western-blotting was used to identify the expression of cTnI and myod in the BMSCs.Results The proliferation of BMSCs was increased, because of the over expression of miRNA-21. But the apoptotic rate of the BMSCs was slower in the miRNA-21 group, on account of the expression of miRNA-21 was higher than that in the NC group and the CK group. The expression of cTnI in the miRNA-21 group was higher than that in the NC group or the CK group.Conclusion The results suggest that the up-regulation of miRNA-21 enhances proliferation of BMSCs, reduces the apoptosis of BMSCs. miRNA-21 promotes the differentiation of BMSCs, which may pave the way for the treatment directed toward restoring miRNA-21 function for myocardial ischemia.

Citation: YANG Wengang, XUE Song, WEN Dezhong, ZHENG Hui, SHAN Jianggui. Effect of up-regulation of miRNA-21 in vitro on bone marrow mesenchymal stem cells. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2020, 27(8): 940-947. doi: 10.7507/1007-4848.201909021 Copy

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