RESUMO
BACKGROUND:Culture supernatant containing myocardiocyte has been demonstrated to induce differentiation of bone marrow-derived mesenchymal stem cel s into myocardiocyte-like cel s. This may associate with some or several cytokines in the culture supernatant. OBJECTIVE:To explore if the supernatant of myocardiocyte induces bone marrow-derived mesenchymal stem cel s to differentiate into myocardiocyte-like cel s is associated with the different cytokine content in the supernatant of myocardiocyte. METHODS:Bone marrow-derived mesenchymal stem cel s were isolated and cultured in vitro by the whole bone marrow adherent culture. Cardiocytes were isolated and cultured by enzyme digestion. Bone marrow-derived mesenchymal stem cel s (1×108/L) and cardiocytes (1×105/L) were cultured for 72 hours and the supernatant was col ected. Hepatocyte growth factor, insulin-like growth factor 1, platelet-derived growth factor, stem cel factor, fibroblast growth factor and vascular endothelial growth factor levels in culture supernatant of bone marrow-derived mesenchymal stem cel s and cardiocytes were detected by enzyme-linked immunosorbent assay. RESULTS AND CONCLUSION:The content of insulin-like growth factor 1, platelet-derived growth factor and fibroblast growth factor in the supernatant of cardiocytes was significantly higher in cardiocytes group compared with bone marrow-derived mesenchymal stem cel s group (P<0.01). Results indicated that insulin-like growth factor 1, platelet-derived growth factor and fibroblast growth factor in the supernatant of cardiocytes may have capability to induce bone marrow-derived mesenchymal stem cel s to differentiate into myocardiocyte-like cel s, and insulin-like growth factor 1 may serve as the main cytokine.