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OBJECTIVE H9c2 cell line is mononucleated myoblast derived from embryonic rat heart tissue.Activities of TGF-β,MMP-2,-9 were reported increased in H9c2 cells after treatment with fibrosis stimuli.MicroRNA (miRNA),a kind of endogenous small non-coding RNA,is involved in cardiac fibrosis.In the present study,expressions of fibrosis related genes and microRNAs in TGF-β-induced H9c2 cells were investigated.