title: Immortalized dendritic cell line with efficient cross-priming ability established from transgenic mice harboring the temperature-sensitive SV40 large T-antigen gene.
abstract: The uptake of an antigen and its presentation to specific T cells by dendritic cells (DCs) is a primary event in initiation of humoral and cellular immune responses as well as the induction of cytotoxic T cells (CTLs). DCs are induced by culturing bone marrow cells in the presence of GM-CSF. However, the resulting DCs are short-lived and the culture usually contains CD11c-negative non-DC cells, which adversely affects reproducibility and makes interpretation of the experimental results difficult. Therefore, it would be useful if DCs could be readily immortalized with their functions being retained. In this study we established a novel, immortalized murine DC line with antigen-presenting capacity in vitro as well as an augmenting effect on humoral and cellular immune responses in vivo, utilizing bone marrow cells from transgenic mice harboring the temperature-sensitive SV40 large T-antigen gene. In the presence of GM-CSF, the resulting DC line, termed SVDC, could be continuously subcultured for more than 12 months. When pulsed with OVA alone or OVA-IgG immune complexes via Fcgamma receptors, SVDC augmented OVA-specific T cell proliferation efficiently in vitro, and elicited OVA-specific IgG production in vivo on the adoptive transfer of pulsed SVDC into naive mice. Interestingly, SVDC exhibited significantly high cross-priming ability compared to DCs in a short-term culture, thus leading to their extremely high effectiveness in inducing anti-tumor immunity in vivo. Thus, SVDC is useful for the detailed characterization of antigen presentation, and for research on the various therapeutic benefits of DC vaccination to elicit specific immune responses in immunodeficiencies, infectious diseases and cancer.
authors.affiliation: Department of Experimental Immunology, and the CREST Program of Japan Science and Techonology Agency (JST), Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Ebihara
authors.forename: Shota
authors.initials: S
authors.lastname: Endo
authors.forename: Kozue
authors.initials: K
authors.lastname: Ito
authors.forename: Yumi
authors.initials: Y
authors.lastname: Ito
authors.forename: Kenichi
authors.initials: K
authors.lastname: Akiyama
authors.forename: Masuo
authors.initials: M
authors.lastname: Obinata
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Takai
mesh_terms: D000818:Animals; D017951:Antigen Presentation; D000941:Antigens / Q000737:chemistry; D000952:Antigens, Polyomavirus Transforming / Q000378:metabolism*; D001854:Bone Marrow Cells / Q000166:cytology; D039521:CD11c Antigen / Q000096:biosynthesis; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D019496:Cancer Vaccines / Q000378:metabolism; D018929:Cell Culture Techniques / Q000379:methods; D002460:Cell Line; D003713:Dendritic Cells / Q000166:cytology* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes / Q000737:chemistry; D005434:Flow Cytometry; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000378:metabolism; D007128:Immunoglobulin Fragments / Q000737:chemistry; D007074:Immunoglobulin G / Q000378:metabolism; D008070:Lipopolysaccharides / Q000737:chemistry; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D010047:Ovalbumin / Q000737:chemistry / Q000378:metabolism; D013601:T-Lymphocytes / Q000378:metabolism; D006377:T-Lymphocytes, Helper-Inducer; D013696:Temperature; D013997:Time Factors
chemical_list: D000941:Antigens; D000952:Antigens, Polyomavirus Transforming; D039521:CD11c Antigen; D019496:Cancer Vaccines; D000939:Epitopes; D007128:Immunoglobulin Fragments; D007074:Immunoglobulin G; D008070:Lipopolysaccharides; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D010047:Ovalbumin