(A) H9C2 cells morphology under light microscope. (B) Quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis of miR-133a-3p expression in the H9C2 cells. (C) Western blot images of CTGF protein in H9C2 cells and densitometric analysis of the band. The values are presented as the mean ± SEM. *P<0.05, **P<0.01.