二硫代氨基甲酸吡咯烷提高甲氨蝶呤对人骨肉瘤MG-63细胞增殖活性和凋亡的影响

目的 观察二硫代氨基甲酸吡咯烷(PDTC)和甲氨蝶呤(MTX)对人骨肉瘤MG-63细胞凋亡和Livin表达的影响.方法 体外培养骨肉瘤MG-63细胞株,用0、50、100、200和400μmol/L的PDTC和MTX作用于骨肉瘤MG-63细胞24、48和72 h后,用噻唑蓝(MTT)比色法检测骨肉瘤MG-63细胞的增殖活性,用流式细胞仪测细胞的凋亡率,用Western blot检测各组细胞的Livin蛋白表达水平.结果 各组骨肉瘤MG-63细胞的增殖活性随着时间增加降低,同时细胞的凋亡率随着时间增加(P＜0.05),各组细胞中Livin蛋白的表达明显降低(P＜0.05).结论 PDTC能提高MTX对骨肉瘤MG-63细胞的凋亡,其机制可能与下调Livin表达,阻断了Livin介导的抗凋亡途径有关.

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.     

甲氨蝶呤对人骨肉瘤MG-63细胞凋亡及28Livin和Caspase-3表达的影响

目的 观察甲氨蝶呤(MTx)对人骨肉瘤MG-63细胞凋亡及Livin和Caspase-3表达的影响.方法 体外培养骨肉瘤MG-63细胞株,用0、50、100、200和400μmol/L的MTX作用于骨肉瘤MG-63细胞24、48、72 h后,用噻唑蓝(MTT)比色法检测骨肉瘤MG-63细胞的增殖活性,用流式细胞仪测细胞的凋亡率,用Western blot检测不同浓度MTX作用于骨肉瘤MG-63细胞24 h后各组细胞的Livin和Caspase-3蛋白表达水平.结果 随MTX浓度增加骨肉瘤MG-63细胞的增殖活性降低,同时细胞的凋亡率增加(P＜0.05),随MTX浓度增加各组细胞中Livin蛋白的表达降低,Caspase-3蛋白表达增加(P＜0.05).结论 MTX诱导人骨肉瘤MG-63细胞凋亡,其机制可能与下调Livin表达继而上调Caspase-3表达有关.

Abstract：

Objective To observe the effect of Methotrexate (MTX) on apoptosis and expression of Livin and Caspase-3 in human osteosarcoma cell line MG-63. Methods After treatment of MG-63 cells with MTX at different concentrations (0, 50, 100,200,400 μmol/L) for 24, 48 and 72 h, methyl thiazol tetrazolium(MTT) assay was used to observe the growth inhibition of MG-63. The apoptosis was assessed by flow cytometry. The protein expression of Livin and Caspase-3 was detected by Western blotting. Results When MTX was added, growth inhibition and increased apoptosis of MG-63 cells were detected,which was showed in a dose- and time-dependent manner. MTX also down-regulated the level of the protein expression of Livin (P＜0.05), and elevated the protein expression of Caspase-3 (P＜0.05). Conclusion MTX can induce apoptosis of MG-63 cells, by down-regulating Livin expression and subsequently up-regulating Caspase-3 expression.     

NF-kB抑制剂PDTC对人骨肉瘤MG-63细胞凋亡及Livin和Caspase-9表达的影响

[目的]观察NF-kB抑制剂PDTC对人骨肉瘤MG-63细胞凋亡及Livin和Caspase-9表达的影响.[方法]体外培养人骨肉瘤MG -63细胞系,用50,100,200和400 RmoV L的PDTC作用于骨肉瘤MG-63细胞24,48,72 h后,用MTT法测各组骨肉瘤MG-63细胞存活率,用流式细胞仪测细胞的凋亡率.用Western Blot方法检测不同浓度PDTC作用于骨肉瘤MG-63细胞24 h后,各组细胞的Livin和Caspase-9蛋白的表达水平.[结果]随PDTC浓度增加,骨肉瘤MG-63细胞后其增殖活性呈下降趋势,作用时间越长细胞的增殖活性越低,而细胞的凋亡率呈上升趋势(P<0.05).随PDTC浓度增加各组细胞中Livin蛋白的表达呈下降趋势,而Caspase9蛋白表达呈上升趋势(P<0.05).[结论]PDTC可诱导人骨肉瘤MG-63细胞凋亡,其机制可能与PDTC抑制NF-kB传导通路,下调Livin表达继而上调Caspase-9表达有关.     

二硫代氨基甲酸吡咯烷提高甲氨蝶呤对人骨肉瘤MG-63细胞增殖活性和凋亡的影响

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.