ABSTRACT
Objective:To observe the specific cellular immune response and the protection against P815 mastovytoma cells(H 2 d) stable expressing HBV surface antigen and HCV core antigen after the immunized mice(H 2 d) with plasmids SpcDNA3.1,CpcDNA3.1 and chimeric plasmid CSpcDNA3.1.Methods:After subcutaneous immunization with the three plasmids SpcDNA3.1,CpcDNA3.1 and CSpcDNA3.1 respecitively 3 w,the mice were inoculated with the transfected P815 tumor cells.The tumors size and the survival rate were measured.CTL assay was detected with LDH methods.Results:The chimeric plasmid CSpcDNA3.1 could inhibit the tumor growth,prolong the survival period and improve the survivial rate evidently.The splencytes from immunized mice showed strong CTL activity to CSpcDNA3.1 transfected P815 tumor cells.Conclusion:It was suggestd that specific antitumor cellular immunity could be induced by immunization with the chimeric plasmid CSpcDNA3.1 that contain chimeric HBV and HCV gene.