title: A novel approach to induce human DCs from monocytes by triggering 4-1BBL reverse signaling.
abstract: Dendritic cells (DCs) are responsible for the initiation of immune responses. Our study demonstrates a new pathway for generating a large quantity of stimulatory monocyte-derived DCs (Mo-DCs) from human monocytes using anti-4-1BB ligand (4-1BBL) mAb to trigger reverse signaling. The anti-4-1BBL-driven Mo-DCs (DCs(alpha-4-1BBL)) not only express higher levels of CD86, CD83 and HLA-DR, when compared with the Mo-DCs matured by tumor necrosis factor alpha, but also exhibit a unique phenotype that expresses lower levels of PD-L1. High levels of GM-CSF, M-CSF and Flt3 ligand (FL) were found in the anti-4-1BBL-differentiation culture. Neutralizing M-CSF, GM-CSF and FL inhibited Mo-DC proliferation stimulated by anti-4-1BBL mAb, suggesting that M-CSF, GM-CSF and FL are involved in cell proliferation stimulated by anti-4-1BBL. Further analysis of the DCs(alpha-4-1BBL) showed increased secretion of T(h)1-type cytokines IL-12 and IFN-gamma and decreased secretion of IL-10. DCs(alpha-4-1BBL) induced much stronger proliferative responses in the mixed lymphocyte reaction assay when compared with DCs derived by GM-CSF. Moreover, DCs(alpha-4-1BBL) preferentially induced T(h)1 responses. We have further demonstrated that anti-4-1BBL antibody stimulated nuclear translocation of NF-kappaB from the cytoplasm in monocytes, suggesting that reverse signaling by 4-1BBL is likely responsible for mediating DC differentiation. Collectively, we have found that reverse signaling of 4-1BBL promotes the differentiation of potent T(h)1-inducing DCs from human monocytes.
authors.affiliation: Biotechnology Institute, Soochow University, Suzhou, Jiangsu Province, People's Republic of China.
authors.forename: Songwen
authors.initials: S
authors.lastname: Ju
authors.forename: Songguang
authors.initials: S
authors.lastname: Ju
authors.forename: Yan
authors.initials: Y
authors.lastname: Ge
authors.forename: Hongxia
authors.initials: H
authors.lastname: Qiu
authors.forename: Binfeng
authors.initials: B
authors.lastname: Lu
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Qiu
authors.forename: Jingxiang
authors.initials: J
authors.lastname: Fu
authors.forename: Gaoqin
authors.initials: G
authors.lastname: Liu
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.forename: Yumin
authors.initials: Y
authors.lastname: Hu
authors.forename: Yongqian
authors.initials: Y
authors.lastname: Shu
authors.forename: Xueguang
authors.initials: X
authors.lastname: Zhang
mesh_terms: D053330:4-1BB Ligand / Q000819:agonists / Q000276:immunology* / Q000378:metabolism; D000911:Antibodies, Monoclonal / Q000494:pharmacology*; D015703:Antigens, CD / Q000276:immunology / Q000378:metabolism; D051940:B7-2 Antigen / Q000276:immunology / Q000378:metabolism; D060890:B7-H1 Antigen; D002454:Cell Differentiation / Q000187:drug effects / Q000276:immunology; D049109:Cell Proliferation / Q000187:drug effects; D003713:Dendritic Cells / Q000187:drug effects / Q000276:immunology* / Q000378:metabolism; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000276:immunology / Q000378:metabolism; D006684:HLA-DR Antigens / Q000276:immunology / Q000378:metabolism; D006801:Humans; D007136:Immunoglobulins / Q000276:immunology / Q000378:metabolism; D007155:Immunologic Factors / Q000494:pharmacology*; D007371:Interferon-gamma / Q000276:immunology / Q000378:metabolism; D016753:Interleukin-10 / Q000276:immunology / Q000378:metabolism; D018664:Interleukin-12 / Q000276:immunology / Q000378:metabolism; D016173:Macrophage Colony-Stimulating Factor / Q000276:immunology / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000276:immunology / Q000378:metabolism; D009000:Monocytes / Q000187:drug effects / Q000276:immunology* / Q000378:metabolism; D016328:NF-kappa B / Q000276:immunology / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology / Q000378:metabolism; D051941:fms-Like Tyrosine Kinase 3 / Q000276:immunology / Q000378:metabolism; D000097802:CD83 Antigen
chemical_list: D053330:4-1BB Ligand; D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D051940:B7-2 Antigen; D060890:B7-H1 Antigen; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D006684:HLA-DR Antigens; D007136:Immunoglobulins; D007155:Immunologic Factors; D007371:Interferon-gamma; D016753:Interleukin-10; D018664:Interleukin-12; D016173:Macrophage Colony-Stimulating Factor; D008562:Membrane Glycoproteins; D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha; D051941:fms-Like Tyrosine Kinase 3; D000097802:CD83 Antigen; C423236:CD274 protein, human; C508609:IL10 protein, human; C497970:FLT3 protein, human