title: Engineering of highly immunogenic long-lived DC vaccines by antiapoptotic protein gene transfer to enhance cancer vaccine potency.
abstract: Dendritic cells (DCs) have a critical role in the induction of antigen-specific immune responses, transporting antigens from peripheral tissue to regional lymph nodes where they interact with antigen-specific T lymphocytes. Recent studies revealed that the efficacy of the T cell-dependent immune response depends on the lifespan of the antigen-presenting DCs in the lymph nodes. Here, we succeeded in engineering long-lived antigen-presenting DCs via Bcl-XL-derived hyperactive mutant antiapoptotic protein (Bcl-X FNK) gene transfer. In a B16BL6 melanoma model, these long-lived DCs exerted potent antitumor immunity that depended mainly on antigen-specific cytotoxic T lymphocytes. Furthermore, in vivo longevity of the long-lived DC vaccine led to antigen-specific activation of interferon-gamma-producing CD4+ and CD8+ T cells. Thus, the long-lived DC vaccine strategy is highly useful for constructing DC vaccines, as well as other cell-based medicines, such as stem cell therapy.
authors.affiliation: Department of Biotechnology and Therapeutics, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yoshikawa
authors.forename: T
authors.initials: T
authors.lastname: Niwa
authors.forename: H
authors.initials: H
authors.lastname: Mizuguchi
authors.forename: N
authors.initials: N
authors.lastname: Okada
authors.forename: S
authors.initials: S
authors.lastname: Nakagawa
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D002465:Cell Movement; D002470:Cell Survival; D003713:Dendritic Cells / Q000276:immunology*; D005260:Female; D005818:Genetic Engineering; D015316:Genetic Therapy / Q000379:methods*; D016219:Immunotherapy, Adoptive / Q000379:methods*; D007371:Interferon-gamma / Q000276:immunology; D008546:Melanoma, Experimental / Q000276:immunology / Q000628:therapy*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D009368:Neoplasm Transplantation; D012878:Skin Neoplasms / Q000276:immunology / Q000628:therapy*; D014161:Transduction, Genetic / Q000379:methods
chemical_list: D007371:Interferon-gamma