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Targeting EZH1 and EZH2 contributes to the suppression of fibrosis-associated genes by miR-214-3p in cardiac myofibroblasts #MMPMID27823969
Zhu WS; Tang CM; Xiao Z; Zhu JN; Lin QX; Fu YH; Hu ZQ; Zhang Z; Yang M; Zheng XL; Wu SL; Shan ZX
Oncotarget 2016[Nov]; 7 (48): 78331-42 PMID27823969show ga
The role of microRNA-214-3p (miR-214-3p) in cardiac fibrosis was not well illustrated. The present study aimed to investigate the expression and potential target of miR-214-3p in angiotensin II (Ang-II)-induced cardiac fibrosis. MiR-214-3p was markedly decreased in the fibrotic myocardium of a mouse Ang-II infusion model, but was upregulated in Ang-II-treated mouse myofibroblasts. Cardiac fibrosis was shown attenuated in Ang-II-infused mice received tail vein injection of miR-214-3p agomir. Consistently, miR-214-3p inhibited the expression of Col1a1 and Col3a1 in mouse myofibroblasts in vitro. MiR-214-3p could bind the 3?-UTRs of enhancer of zeste homolog 1 (EZH1) and ?2, and suppressed EZH1 and ?2 expressions at the transcriptional level. Functionally, miR-214-3p mimic, in parallel to EZH1 siRNA and EZH2 siRNA, could enhance peroxisome proliferator-activated receptor-? (PPAR-?) expression and inhibited the expression of Col1a1 and Col3a1 in myofibroblasts. In addition, enforced expression of EZH1 and ?2, and knockdown of PPAR-? resulted in the increase of Col1a1 and Col3a1 in myofibroblasts. Moreover, the NF-?B signal pathway was verified to mediate Ang-II-induced miR-214-3p expression in myofibroblasts. Taken together, our results revealed that EZH1 and ?2 were novel targets of miR-214-3p, and miR-214-3p might be one potential miRNA for the prevention of cardiac fibrosis.