Objective To investigate the role of miR-433 in chemoresistance to docetaxel in breast cancer cells. Methods A docetaxel-resistant MCF-7 breast cancer cell line(MCF-7/DOX) was established by exposure of parental MCF-7 cells to progressively increased docetaxel concentrations. The functional role of miR-433 was investigated by assessing the changes in viability and apoptosis of the cells transfected with a miR-433 inhibitor or a miR-433 mimics. The downstream targets of miR-433 were determined by bioinformat...