B7 and DC vaccines induced anti-tumor immunity against murine T-lymphocyte leukemia L615

To study the effect of B7 and DC vaccines in inducing anti-tumor immunity in murine T-lymphocyte leukemia L615. In vivo, murine mortality and survival were observed to compare the difference between B7 and DC vaccine in inducing immunoprotection against the subsequent challenge of live L615 cells;in vitro, specific cytotoxic assay and MLR were performed to test the specific cytotoxicity and proliferative activity of effective T cells. Both vaccines could efficiently improve T cell mediated anti-leukemic immunity in syngenic hosts, and DC vaccine was revealed to be more efficient. In vitro observations showed that both vaccines could induce tumor specific cytotoxicity and proliferative activity of effective T cells. DC vaccine is promising in tumor immunotherapy owing to its safety, efficiency and convenience.