PT - JOURNAL ARTICLE AU - Kaplan, Johanne M. AU - Yu, Queendy AU - Piraino, Susan T. AU - Pennington, Sarah E. AU - Shankara, Srinivas AU - Woodworth, Lisa A. AU - Roberts, Bruce L. TI - Induction of Antitumor Immunity with Dendritic Cells Transduced with Adenovirus Vector-Encoding Endogenous Tumor-Associated Antigens DP - 1999 Jul 15 TA - The Journal of Immunology PG - 699--707 VI - 163 IP - 2 4099 - http://www.jimmunol.org/content/163/2/699.short 4100 - http://www.jimmunol.org/content/163/2/699.full SO - J. Immunol.1999 Jul 15; 163 AB - Dendritic cells (DCs) are professional Ag-presenting cells that are being considered as potential immunotherapeutic agents to promote host immune responses against tumor Ags. In this study, recombinant adenovirus (Ad) vectors encoding melanoma-associated Ags were used to transduce murine DCs, which were then tested for their ability to activate CTL and induce protective immunity against B16 melanoma tumor cells. Immunization of C57BL/6 mice with DCs transduced with Ad vector encoding the hugp100 melanoma Ag (Ad2/hugp100) elicited the development of gp100-specific CTLs capable of lysing syngeneic fibroblasts transduced with Ad2/hugp100, as well as B16 cells expressing endogenous murine gp100. The induction of gp100-specific CTLs was associated with long term protection against lethal s.c. challenge with B16 cells. It was also possible to induce effective immunity against a murine melanoma self Ag, tyrosinase-related protein-2, using DCs transduced with Ad vector encoding the Ag. The level of antitumor protection achieved was dependent on the dose of DCs and required CD4+ T cell activity. Importantly, immunization with Ad vector-transduced DCs was not impaired in mice that had been preimmunized against Ad to mimic the immune status of the general human population. Finally, DC-based immunization also afforded partial protection against established B16 tumor cells, and the inhibition of tumor growth was improved by simultaneous immunization against two melanoma-associated Ags as opposed to either one alone. Taken together, these results support the concept of cancer immunotherapy using DCs transduced with Ad vectors encoding tumor-associated Ags.