Objective:To investigate the silencing of P27RF-Rho gene with lenvirus targeting mediated technique,and to clarify its influence in the invasion of liver cancer cells.Methods:The P27RF-Rho RNAi lentivirus was constructed. The liver cancer BEL7402 cells were infected with lentivirus. The experiment was divided into P27RF Rho-siRNA group, scramble-siRNA group and BEL7402 group.The effect of silencing P27RF-Rho gene and the expression levels of hepatocellular carcinoma (HCC)associated proteins RhoA,RhoC, VEGF,P53 and PTEN were detected;the activities of matrix metalloproteinase (MMPs)associated with tumor invasion were analyzed by Gelatin zymography;the variation of transfer ability and invasion abilities were compared by Wound healing assay experiment and Transwell experiment.Results:The Western blotting results showed the expression levels of P27RF-Rho,RhoA,RhoC,and VEGF proteins in the BEL7402 cells in experiment group were significantly lower than those in two control groups (P<0.05),and the expression levels of P53 and PTEN were higher than those in two control groups (P<0.05).The results of Gelatin zymography showed the activities of MMPs in experiment group were significantly lower than those in two control groups (P<0.01 );Wound healing assay showed that the migration ability of the BEL7402 cells in experiment group was significantly inhibited (P<0.01);the number of cells passed through the Transwell Chambers in experiment group was significantly less than those in two control groups (P<0.01).Conclusion:Silenceing P27RF-Rho can weaken the invasion ability and migration ability of human HCC BEL7402 cells.

Objective:To investigate the influence of P27RF-Rho mRNA gene silencing in the drug sensitivity of 5-fluorouracil(5-Fu)to the liver cancer SMMC cell line,and to provide theoretical basis for the treatment of advanced liver cancer.Methods:The P27RF-Rho RNAi vector was constructed and the P27RF-Rho gene silencing lentivirus were used to infect the SMMC7721 cells.Western blotting method was used to detect the gene silencing effect.The SMMC7721 cells were divided into Scramble-siRNA group, 5-Fu group, P27RF-Rho siRNA group and P27RF-Rho siRNA + 5-Fu group.Western blotting was used to detect the transfection efficiency of RNAi.MTT method was used to detect the cell growth in various groups.Scratching test was used to detect the migration ability of cells in various groups.Transwell experiment were used to detect the invasion ability of cells in various groups.The expressions of P27 and RhoC protein were detected by Western blotting method.Results:P27RF-Rho RNAi lentiviral vector was successfully constructed.The Western blotting results showed that the expression of P27RF-Rho protein in P27RF-Rho siRNA group was decreased compared with 5-Fu group and Scramble-siRNA group(P<0.05).Compared with other three groups, the growth speed of the cells in P27RF-Rho siRNA + 5-Fu group was significantly decreased(P<0.05).The migration ability of the cells in P27RF-Rho siRNA + 5-Fu group was significantly lower than those in other three groups (P<0.01);the average number of cells passing through the Transwell microporous membrane was significantly less than those in other three groups (P<0.01).The Western blotting analysis results showed that the expression level of P27 protein in the cells in P27RF-Rho siRNA + 5-Fu group was significantly higher than those in other three groups(P<0.05);the expression level of RhoC protein was significantly lower than those in other three groups(P<0.05).Conclusion:P27RF-Rho gene silencing can significantly enhance the drug sensitivity of 5-Fu to SMMC7721 cells.