PSMA7 对A549 细胞中RB 途径的影响

目的:探究高表达和干扰PSMA7 对A549 细胞周期以及RB 途径中Cyclin D1、CDK4、P16、Rb 蛋白水平的影响。方法:将pcDNA3.1-PSMA7 高表达和pGPU6/ Hygro-PSMA7-265 干扰载体分别瞬时转染A549 细胞,然后用流式细胞仪检测PSMA7 对细胞周期的影响,再通过Western blot 实验检测Cyclin D1、CDK4、P16、Rb 的蛋白水平。结果:和对照组相比,PSMA7 高表达时周期时相分布无明显差异,但Cyclin D1、CDK4 的蛋白表达水平明显降低,P16、Rb 的表达明显增高;和对照组相比,干扰PSMA7 后细胞的G0/ G1、G2/ M 期比例均降低,而S 期的值增高,均具有差异,而Cyclin D1、CDK4 的蛋白表达水平明显增加,P16、Rb 的表达明显降低,以上结果与对照组相比差异均有统计学意义。结论:PSMA7 在A549 肺腺癌细胞中能够影响RB 途径中Cyclin D1、CDK4、P16、Rb 的蛋白水平的表达,干扰PSMA7 使A549 细胞较早进入S 期。

Effect of PSMA7 on RB pathway in A549 cells

Objective:To investigate the effect of upregulated and downregulated PSMA7 on the cell cycle and Cyclin D1,CDK4,P16,Rb of RB pathway in A549cells.Methods:Transfected upregulated pcDNA3.1-PSMA7 vecter and downregulated pGPU6/ Hygro-PSMA7-265 vecter into A549 cells,and then tested the effect of PSMA7 on the cell cycle of A549 cells by flow cytometry,and detected the protein level of Cyclin D1,CDK4,P16,Rb by Western blot.Results:Compared with the control group,the cell cycle of the A549 cells did not change significantly,and the expression of Cyclin D1,CDK4 decreased but P16,Rb increased when PSMA7 was up-regulated.Compared with the control group,the proportion of phase G0/ G1,G2/ M of the A549 cells decreased and phase S increased,and the expression of Cyclin D1,CDK4 increased but P16,Rb decreased when PSMA7 was downregulated.There was statistical significance for those results.Conclusion:PSMA7 could affect the expression of Cyclin D1,CDK4,P16,Rb protein level of RB pathway in A549 and promoted the A549 cells into phase S when it’s downregulated.