title: Vaccination of dendritic cells loaded with interleukin-12-secreting cancer cells augments in vivo antitumor immunity: characteristics of syngeneic and allogeneic antigen-presenting cell cancer hybrid cells.
abstract: Cancer immunotherapy by fusion of antigen-presenting cells and tumor cells has been shown to induce potent antitumor immunity. In this study, we characterized syngeneic and allogeneic, murine macrophage/dendritic cell (DC)-cancer fusion cells for the antitumor effects. The results showed the superiority of allogeneic cells as fusion partners in both types of antigen-presenting cells in an in vivo immunotherapy model. A potent induction of tumor-specific CTLs was observed in these immunized conditions. In addition, the immunization with DC-cancer fusion cells was better than that with macrophage-cancer fusion cells. Both syngeneic and allogeneic DC-cancer fusion cells induced higher levels of IFN-gamma production than macrophage-cancer fusion cells. Interestingly, allogeneic DC-cancer fusion cells were superior in that they efficiently induced Th1-type cytokines but not the Th2-type cytokines interleukin (IL)-10 and IL-4, whereas syngeneic DC-cancer fusion cells were powerful inducers of both Th1 and Th2 cytokines. These results suggest that allogeneic DCs are suitable as fusion cells in cancer immunotherapy. To further enhance the antitumor immunity in the clinical setting, we prepared DCs fused with IL-12 gene-transferred cancer cells and thus generated IL-12-secreting DC-cancer fusion cells. Immunization with these gene-modified DC-cancer fusion cells was able to elicit a markedly enhanced antitumor effect in the in vivo therapeutic model. This novel IL-12-producing fusion cell vaccine might be one promising intervention for future cancer immunotherapy.
authors.affiliation: Department of Respiratory Oncology and Molecular Medicine, Institute of Development, Aging, and Cancer, Tohoku University, Sendai, Japan.
authors.forename: Takuji
authors.initials: T
authors.lastname: Suzuki
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Fukuhara
authors.forename: Masashi
authors.initials: M
authors.lastname: Tanaka
authors.forename: Akira
authors.initials: A
authors.lastname: Nakamura
authors.forename: Kenichi
authors.initials: K
authors.lastname: Akiyama
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Sakakibara
authors.forename: Daizo
authors.initials: D
authors.lastname: Koinuma
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Kikuchi
authors.forename: Ryushi
authors.initials: R
authors.lastname: Tazawa
authors.forename: Makoto
authors.initials: M
authors.lastname: Maemondo
authors.forename: Koichi
authors.initials: K
authors.lastname: Hagiwara
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Saijo
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nukiwa
mesh_terms: D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology; D000970:Antineoplastic Agents / Q000494:pharmacology; D019496:Cancer Vaccines; D045744:Cell Line, Tumor; D003713:Dendritic Cells / Q000166:cytology*; D005260:Female; D006822:Hybrid Cells; D007167:Immunotherapy / Q000379:methods*; D007371:Interferon-gamma / Q000378:metabolism; D016753:Interleukin-10 / Q000378:metabolism; D018664:Interleukin-12 / Q000235:genetics* / Q000378:metabolism; D015847:Interleukin-4 / Q000378:metabolism; D008264:Macrophages / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D009368:Neoplasm Transplantation; D009369:Neoplasms / Q000188:drug therapy / Q000276:immunology* / Q000378:metabolism; D013154:Spleen / Q000166:cytology; D013601:T-Lymphocytes / Q000378:metabolism; D013997:Time Factors
chemical_list: D000970:Antineoplastic Agents; D019496:Cancer Vaccines; D016753:Interleukin-10; D018664:Interleukin-12; D015847:Interleukin-4; D007371:Interferon-gamma