TGFB1 and Myocardial fibrosis: In a hypertensive myocardial fibrosis model induced by angiotensin II, miR-29b was significantly downregulated in heart tissues; recovery of miR-29b expression was sufficient to prevent or rescue hypertensive myocardial fibrosis induced by angiotensin II, and partly attenuated reduction of cardiac function via repressing TGF-β/SMAD3 as well as MAPK pathways (22).