【Abstract】 Objective To investigate whether adenovirus mediated IL 2 gene modification can improve antitumor immunity of the tumor antigen pulsed dendritic cells(DC) in vivo. Methods DC were generated from bone marrow, then, pulsed with FBL 3 erythroleukemia cell lysates and transfected with IL 2 gene simultaneously. IL 2 secretion and T cell stimulating activity of the DC were detected. The number and cell subsets of draining lymph nodes, cytotoxic lymphocyte(CTL) activity ,and the increase of protective effect for the mice s.c vaccinated with DC were observed. Results IL 2 gene modified, antigen pulsed DC could secrete high level of IL 2 in vitro, stimulate proliferation of syngeneic T cells markedly. DC vaccine could increase the number of draining lymph node and induce CTL activity, which directed to FBL 3, more significantly. After the DC vaccination, the survival time of the mice challenged with wild type FBL 3 cells were prolonged. Conclusion Antitumor immune response could be induced more potently by vaccination with IL 2 gene modified, antigen pulsed DC.更多还原