干扰Livin基因对人胆管癌QBC939细胞增殖影响的研究

目的 研究转染Livin反义寡核苷酸(antisense oligodeoxynucleotide,ASODN)对人胆管癌细胞株QBC939细胞Livin mRNA及Livin蛋白表达以及细胞增殖的影响.方法 设计合成全硫代磷酸化修饰并5'端FITC荧光标记的Livin ASODN.用脂质体介导Livin ASODN转染QBC939细胞,荧光显微镜观察24 h Livin ASODN转染人细胞的情况,并计算转染率.MTT法检测Livin反义寡核苷酸对QBC939细胞增殖的抑制作用.RT-PCR和细胞免疫荧光化学分别检测转染后48 h Livin mRNA表达及Livin蛋白的变化.结果 500 mol/L ASODN转染后24 h可达到最佳的转染效果;转染后60 h,能明显抑制胆管癌细胞的增殖.转染60 h后,RT-PCR及细胞免疫荧光化学检测分别显示Livin mRNA及Livin蛋白表达水平明显低于对照组(P<0.05).结论 脂质体介导转染Livin ASODN能特异性地抑制QBC939细胞中的Livin基因及Livin蛋白表达,抑制胆管癌QBC939细胞的增殖,降低癌细胞活力.

Abstract：

Objective To study the effect of transfection of livin antisense oligodeoxynucleotide (Livin ASODN) on Livin mRNA and Livin protein expression and proliferation of QBC939 cells.Methods Livin ASODN was transfected into cell line QBC939 by LipofectamineTM 2000. Fluorescence microscopy was used to observe the ASODN transfected cells and to calculate the rate of transfection.to measure Livin mRNA and Livin protein expression by RT-PCR and immunohistochemistry and con-focal laser scanning microscopy after the transfection. Changes in cell proliferation were detected by MTT. Results The highest efficiency was at 24 hours after 500 nmol/L Livin ASODN transfection.The results of MTT showed that the inhibition of cell proliferation of QBC939 cells was most obvious at 60 hours after Livin ASODN transfection (P<0. 05). The level of Livin mRNA and Livin protein expression in the ASODN group was obviously lower than that in the control group (P<0. 05).Conclusion The transfection of Livin ASODN inhibited Livin gene and Livin protein expression, and obviously inhibited the proliferation and depressed the vitality of QBC939 cells.

Research of interference Livin gene inhibits growth of QBC939 cell

Objective To study the effect of transfection of livin antisense oligodeoxynucleotide (Livin ASODN) on Livin mRNA and Livin protein expression and proliferation of QBC939 cells.Methods Livin ASODN was transfected into cell line QBC939 by LipofectamineTM 2000. Fluorescence microscopy was used to observe the ASODN transfected cells and to calculate the rate of transfection.to measure Livin mRNA and Livin protein expression by RT-PCR and immunohistochemistry and con-focal laser scanning microscopy after the transfection. Changes in cell proliferation were detected by MTT. Results The highest efficiency was at 24 hours after 500 nmol/L Livin ASODN transfection.The results of MTT showed that the inhibition of cell proliferation of QBC939 cells was most obvious at 60 hours after Livin ASODN transfection (P<0. 05). The level of Livin mRNA and Livin protein expression in the ASODN group was obviously lower than that in the control group (P<0. 05).Conclusion The transfection of Livin ASODN inhibited Livin gene and Livin protein expression, and obviously inhibited the proliferation and depressed the vitality of QBC939 cells.