Aim To investigate the effects of captopril on the proliferation,differentiation and the mRNA expression of Type I Collagen(COLL-Ⅰ) in MC3T3-E1 cells.Methods The MTT method was employed to detect the cells proliferation after culture with captopril for 12 h,24 h and 36 h respectively.The cell differentiation was evaluated by detecting activities of alkaline phosphatase(ALP) using PNPP method after culture with captopril for 3 d,5 d and 7 d respectively.Reverse transcription-Polymerase chain reaction(RT-PCR)...