title: Baculovirus activates murine dendritic cells and induces non-specific NK cell and T cell immune responses.
abstract: We previously reported that the baculovirus induced a strong host immune response against infections and malignancies. Among the immune cells, the dendritic cells were most strongly infected and activated by the baculovirus, although the exact mechanism remained unclear. Here, we evaluated the non-specific immune responses of bone marrow-derived dendritic cells (BMDCs) after infection by a wild-type baculovirus. MHC class I and II molecules and co-stimulation molecules (CD40, CD80, and CD86) on BMDCs were up-regulated by baculovirus infection. At the same time, the BMDCs produced pre-inflammatory cytokines (IL-6, IL12p70, and TNF-alpha) and IFN-alpha. NK cells showed IFN-gamma production, CD69 up-regulation, and enhanced cytotoxicity when they were co-cultured with baculovirus-infected BMDCs. T cells showed IFN-gamma production, CD69 up-regulation, and cell proliferation. Ex vivo analysis performed in vitro produced similar results. These findings suggested that baculovirus-infected dendritic cells induce non-specific immune responses and can be used as an immunotherapeutic agent against viral infections and malignancies, together with present therapeutic drug regimens.
authors.affiliation: Department of Life and Environmental Sciences, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Suzuki
authors.forename: Myint Oo
authors.initials: MO
authors.lastname: Chang
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kitajima
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Takaku
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000276:immunology; D016367:Baculoviridae / Q000235:genetics / Q000276:immunology*; D001853:Bone Marrow / Q000276:immunology; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D018920:Coculture Techniques; D016207:Cytokines / Q000096:biosynthesis / Q000276:immunology; D004279:DNA, Viral / Q000235:genetics; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology*; D005260:Female; D015967:Gene Expression Regulation, Viral; D007694:Killer Cells, Natural / Q000276:immunology*; D008213:Lymphocyte Activation; D051379:Mice; D008810:Mice, Inbred C57BL; D013601:T-Lymphocytes / Q000276:immunology*; D015854:Up-Regulation
chemical_list: D015703:Antigens, CD; D016207:Cytokines; D004279:DNA, Viral