title: Expression and function of 4-1BB and 4-1BB ligand on murine dendritic cells.
abstract: 4-1BB (CDw137) and its ligand (4-1BBL) have been implicated in cellular immune responses. To further characterize the expression and function of 4-1BBL, we newly generated an anti-mouse 4-1BBL mAb (TKS-1), which can inhibit the interaction of 4-1BBL with 4-1BB. Flow cytometric analyses using TKS-1 and an anti-mouse 4-1BB mAb indicated that 4-1BB was inducible on both CD4(+) and CD8(+) splenic T cells by stimulation with immobilized anti-CD3 mAb, but 4-1BBL was not expressed on resting or activated T cells. 4-1BBL expression was inducible on splenic B cells by stimulation with anti-IgM antibody plus anti-CD40 mAb, on peritoneal macrophages by stimulation with lipopolysaccharide (LPS) and on splenic dendritic cells (DC) by stimulation with anti-CD40 mAb or LPS. Interestingly, splenic DC expressed 4-1BB constitutively, which was down-regulated by anti-CD40 stimulation. Co-culture of splenic DC with 4-1BBL-transfected cells or 4-1BBL-expressing tumor cell lines led to cytokine (IL-6 and IL-12) production and co-stimulatory molecule up-regulation by splenic DC, indicating that 4-1BBL can directly activate DC. Moreover, IL-12 production by anti-CD40-stimulated DC was partially inhibited by TKS-1. These results suggest that 4-1BB expressed on DC may be involved in DC activation through DC--tumor interaction and DC--DC interaction.
authors.affiliation: Department of Immunology, Juntendo University School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
authors.forename: Toshiro
authors.initials: T
authors.lastname: Futagawa
authors.forename: Hisaya
authors.initials: H
authors.lastname: Akiba
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Kodama
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Takeda
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Hosoda
authors.forename: Hideo
authors.initials: H
authors.lastname: Yagita
authors.forename: Ko
authors.initials: K
authors.lastname: Okumura
mesh_terms: D053330:4-1BB Ligand; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D015703:Antigens, CD; D001402:B-Lymphocytes / Q000276:immunology; D019013:CD40 Antigens / Q000378:metabolism; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000276:immunology*; D005260:Female; D018664:Interleukin-12 / Q000096:biosynthesis; D008264:Macrophages / Q000276:immunology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D008815:Mice, Inbred Strains; D008822:Mice, Transgenic; D017475:Receptors, Nerve Growth Factor / Q000235:genetics / Q000378:metabolism* / Q000502:physiology*; D018124:Receptors, Tumor Necrosis Factor / Q000235:genetics / Q000378:metabolism* / Q000502:physiology*; D013601:T-Lymphocytes / Q000276:immunology; D053261:Tumor Necrosis Factor Receptor Superfamily, Member 9; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000378:metabolism* / Q000502:physiology*
chemical_list: D053330:4-1BB Ligand; D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D019013:CD40 Antigens; D017475:Receptors, Nerve Growth Factor; D018124:Receptors, Tumor Necrosis Factor; C505715:Tnfrsf9 protein, mouse; C505975:Tnfsf9 protein, mouse; D053261:Tumor Necrosis Factor Receptor Superfamily, Member 9; D014409:Tumor Necrosis Factor-alpha; D018664:Interleukin-12