Cardiac specific markers Nkx2.5, GATA4, MEF2c, and β-MHC miRNA level and the protein level of GATA4 and β-MHC. (A–D) Nkx2.5, GATA4, MEF2c, and β-MHC miRNA level at 3, 6, 9, and 12 days in normal control BMSCs, miR-199b-5p inhibitor transfected group in BMSCs and miR-199b-5p inhibitor transfected group in BMSCs infected HSF1 shRNA lentiviral, respectively (E) The protein level of GATA4 and β-MHC at day 12 in the aforementioned three groups. (F) GATA4 and β-MHC relative expression; * p<0.05, n=3.