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Objective To investigate the effect of over-expression of E2 protein GFP-E2,GFP-TAD(N-extremity domain of HPV18 E2)and GFP-DBD(C-extremity domain of HPV18 E2)fusion proteins on the apoptosis of macmphages in uterine cervix cancer was studied.Methods TAD or DBD gene was amplified by PCR from pEGFP-C1/HPV18 E2,and cloned into pEGFP-C1 vector.Then the subclone of pEGFP-C1/TAD or pEGFP-C1/DBD was screened respectively.Forty-elght hours after transfection of pEGFP-C1/HPV18 E2,pEGFP-C1/TAD,pEGFP-C1/DBD or pEGFP-C1 into macrophages,the localization or expression of them was analyzed by fluorescent micmscope or western blot,respectively.The apoptotic rate of macrophages was detected by flow cytometry.Results The plasmid of pEGFP-C1/TAD or pEGFP-C1/DBD was constructed respectively.Macmphages transfected with different plasmid,over-expression of GFP-E2 or GFP-TAD fusion protein up-regulated apoptotic rate of macrophages.Furthermore,the effect of GFP-TAD was more powerful than GFP-E2.But the GFP-DBD over-expressed had not the same effects.Conclusion Over-expression of GFP-E2 or GFPTAD fusion protein could induce apoptosis of macrophages.