Overexpression of miR-210 promotes the potential of cardiac stem cells against hypoxia

Objective. To evaluate the effects of miR-210 on cardiac stem cells (CSCs) against hypoxia-induced injury. Methods. CSCs were isolated from rat ventricular wall and cultured until passage 4. After exposure to hypoxia for 6 h, the expression of miR-210 was determined. Thereafter, transfection of miR-210 mimic and inhibitor was carried out. 1 week later, in vitro experiments were performed to measure the expression of caspase-8-associated protein 2 (Casp8ap2), Caspase 8, protein tyrosine phosphatase, non-receptor type 2 (PTPN2) and CXC chemokine receptor 4 (CXCR4), as well as migration and apoptosis of CSCs under hypoxic condition. Results. Hypoxia induced a significant up-regulation of miR-210 expression in CSCs. Notably, the expression of Casp8ap2, Caspase8, PTPN2 was dramatically inhibited by overexpression of miR-210 in CSCs miR-210 Group (P .05), compared with the control. Additionally, a decreased apoptosis of CSCs was detected in CSCs miR-210 Group (26.22 ± 1.15%, P