AIM: To observe the effects of the combination of berberin and epirubicin on the cell cycle of T24 bladder cancer cells and the underlying mechanisms. METHODS: The cancer cells were exposed to epirubicin in the presence or absence of different concentrations of berberin. The viability of the cancer cells was determined by MTT assay.The cell cycle distribution was detected by flow cytometry,and the protein levels of cyclin D1,CDK2,CDK4,P21 and P27 were detected by Western blot. RESULTS: Berberine markedly en...