LAUSR

MicroRNAs (miRNAs) feature prominently in regulating the progression of chronic heart failure (CHF). This study was performed to investigate the role of miR‐8485 in the injury of cardiomyocytes and CHF. It was found that miR‐8485 level was markedly reduced in the plasma of CHF patients, compared with the healthy controls. H2O2 treatment increased tumor necrosis factor‐α, interleukin (IL)‐6, and IL‐1β levels, inhibited the viability of human adult ventricular cardiomyocyte cell line AC16, and increased the apoptosis, while miR‐8485 overexpression reversed these effects. Tumor protein p53 inducible nuclear protein 1 (TP53INP1) was identified as a downstream target of miR‐8485, and TP53INP1 overexpression weakened the effects of miR‐8485 on cell viability, apoptosis, as well as inflammatory responses. Our data suggest that miR‐8485 attenuates the injury of cardiomyocytes by targeting TP53INP1, suggesting it is a protective factor against CHF.