Effect of NDRG2 gene on the migration and invasion of prostate cancer cell line PC-3M

Abstract

Objective To investigate the effect of NDRG2 gene expression on the cell migration and invasion of human prostate cancer cell line PC-3M.Methods Recombinant adenovirus vectors carrying human NDRG2 gene (Ad-NDRG2) were infected into prostate cancer cell line PC-3M.The protein expression and enzymatic activities of NDRG2,MMP-2 and MMP-9 were determined by Western blotting and gelatin zymography respectively.Methylthiazol tetrazolium (MTT) assay and plate colony formation were used to determine the effect of proliferation of PC-3M cells.Invasion of PC-3M cells was measured by Transwell chamber assay.Results After infection by Ad-NDRG2,it had been verified that the protein expression of NDRG2 in PC-3M cells was obviously increased,and the expression and enzymatic activities of MMP-2 and MMP-9 were reduced.The MTT assay (inhibition ratio: 24 h,16.2%,48 h,24.4%,and 72 h,43.7% respectively) and plate colony formation (56.3%,55.2% and 36.7% in control group,Ad-LacZ group and Ad-NDGR2 group respectively) revealed that NDRG2 could significantly inhibit the growth and proliferation of PC-3M cells.The number of PC-3M cells that invaded the lower chamber in the Ad-NDRG2 group was significantly decreased as compared with the control group and the Ad-LacZ group (93.0,94.8 and 50.4 respectively).Conclusion NDRG2 gene can significantly inhibit invasion of the PC-3M cells,which may paly an important role in metastasis of prostate cancer. Key words: Prostate carcinoma; NDRG2 gene; Invasion