Abstract
Objective To detect the effect of pyirolidine dithiocarbamate (PDTC) and methotrexate (MTX) on apoptosis and expression of livin of human osteosarcoma MG-63 cells. Methods MG-63 cells were cultured in vitro. At 24, 48 and 72 h after treatment of PDTC and MTX at different concentrations (0, 50, 100, 200 and 400 μmol/L) , MTT assay was used to observe the growth inhibition of MG-63 cells. The apoptosis was assessed by flow cytometry. The protein expression of livin was detected by Westem blotting. Results When PDTC and MTX were added, growth inhibition and increased apoptosis of MG-63 cells were detected. The protein expression level of livin was down-regulated obviously ( P ＜0. 05). Conclusion PDTC can promote the apoptosis of MTX-treated MG-63 cells, which may be correlated with down-regulation of the livin expression. Key words: Osteosarcoma; Methotrexate; Pyrrolidine dithiocarbamate; Livin
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