Apr-1基因对胆管癌细胞QBC939细胞周期的调节机制研究

目的 研究Apr-1基因对胆管癌细胞的细胞周期调节作用及机制.方法 采用脂质体介导法将Apr-1基因转染胆管癌细胞系QBC939,建立稳定表达Apr-1基因的细胞模型(QBC939-Apr-1).运用RT-PCR检测转染前后QBC939细胞系中Apr-1 mRNA的表达;流式细胞分析以及生长曲线等方法观察目的 基因对该细胞系的细胞周期的影响.采用细胞周期基因芯片,观察Apr-1基因对细胞周期相关基因表达的调节作用.结果 Apr-1基因在QBC939细胞系中呈阴性表达,转染Apr-1基因的QBC939-Apr-1细胞出现了Apr-1 mRNA的表达,成功建立了稳定表达Apr-1基因的细胞模型,该细胞模型表现出细胞生长受抑,细胞周期显示G2期细胞由9%增加至13%(P＜0.01).细胞周期抑制;并且细胞周期基因芯片检测结果发现:Skp2、UBE基因的表达水平出现明显上调,而CDC6、Cyclin H等25种基因的表达下降,其中MRE11A、CKS2、CDK8、CDC45下调在3倍以上.结论 Apr-1基因在体外能够使QBC939细胞的细胞周期在G2期延长,出现细胞周期多种调节基因的表达差异.

Abstract：

Objective To investigate the role and the mechanism of Apr-1 gene on cholangiocarcinoma QBC939 cell lines proliferation and cell cycle regulation. Methods Apr-1 gene was transfected into QBC939 cells by using liposomes to establish a QBC939 cell model ( QBC939-Apr-1 ) stably expressing Apr-1 gene. Apr-1 mRNA expression and the changes in cell cycle and cell growth of QBC939 cells were analyzed by RT-PCR, flow cytometry ( FCM ) and growth curve before and after transfection. The regulatory effect of Apr-1 gene on the expression of cell cycle-related genes was investigated in QBC939 cells before and after Apr-1 transfection using cell cycle gene microarrays. Results Significant suppression of cell growth was observed with the cell model stably expressing Apr-1 gene. Apr-1 over-expression caused cell arrest from 9% to 13% (P ＜0. 01 ) increase in G2 population. Cell cycle gene microarrays demonstrated that the expression of Skp2 、UBE1 was up-regulated, while the expression of MRE11A 、CKS2 、CDK8 、CDC45 was down-regulated by more than 3 folds. Conclusions Apr-1 gene suppresses QBC939 cell proliferation in vitro, QBC939 cells presented with differences in the expression of cell cycle-related genes after Apr-1 gene transfection.

Effects of Apr-1 gene on cell cycle regulation of cholangiocarcinoma QBC939 cell lines

Objective To investigate the role and the mechanism of Apr-1 gene on cholangiocarcinoma QBC939 cell lines proliferation and cell cycle regulation. Methods Apr-1 gene was transfected into QBC939 cells by using liposomes to establish a QBC939 cell model ( QBC939-Apr-1 ) stably expressing Apr-1 gene. Apr-1 mRNA expression and the changes in cell cycle and cell growth of QBC939 cells were analyzed by RT-PCR, flow cytometry ( FCM ) and growth curve before and after transfection. The regulatory effect of Apr-1 gene on the expression of cell cycle-related genes was investigated in QBC939 cells before and after Apr-1 transfection using cell cycle gene microarrays. Results Significant suppression of cell growth was observed with the cell model stably expressing Apr-1 gene. Apr-1 over-expression caused cell arrest from 9% to 13% (P ＜0. 01 ) increase in G2 population. Cell cycle gene microarrays demonstrated that the expression of Skp2 、UBE1 was up-regulated, while the expression of MRE11A 、CKS2 、CDK8 、CDC45 was down-regulated by more than 3 folds. Conclusions Apr-1 gene suppresses QBC939 cell proliferation in vitro, QBC939 cells presented with differences in the expression of cell cycle-related genes after Apr-1 gene transfection.