(A) Transfection concentrations of miR-133a-3p inhibitor in H9C2 cells. (B) Transfection concentrations of miR-133a-3p mimics in H9C2 cells. (C) Expression of CTGF in H9C2 cells after transfection with miR-133a-3p inhibitor. (D) Expression of CTGF in H9C2 cells after transfection with miR-133a-3p mimics. The values are presented as the mean ± SEM. *P<0.05, **P<0.01.