Objective To study the effect and mechanism of human hepatoma-derived growth factor( hHDGF) on the proliferation of prostate cancer cells. Methods Lentivirus vector was constructed according to the target sequence of hHDGF gene,which was then packaged into lentivirus particles and purified to transfect prostate cancer cells DU145 and LNCaP. The cells were divided into two groups separately:(1) Control group,which was treated by lentivirus with the insignificant sequence;(2) Experimental group,which was trea...