title: Human dendritic cell responses to lipopolysaccharide and CD40 ligation are differentially regulated by interleukin-10.
abstract: We evaluated the effects of interleukin (IL)-10 on the maturation of human dendritic cells (DC) induced either by lipopolysaccharide (LPS) or CD40 engagement. For this purpose, DC generated by culturing plastic-adherent peripheral blood mononuclear cells for 7 days with granulocyte/macrophage-colony-stimulating factor and IL-4 were incubated for 3 days with either LPS (10 ng/ml) or 3T6 fibroblasts transfected with the gene encoding CD40 ligand, in absence or presence of IL-10. First we found that the membrane expression of CD83, a marker of mature DC, was inhibited by IL-10 when induced by LPS but not by CD40 engagement. Likewise, IL-10 inhibited LPS-induced but not CD40-dependent CD86 (B7.2) up-regulation on DC. Furthermore, IL-10 inhibited the production of IL-8 and tumor necrosis factor-alpha by DC when activated by LPS but not by CD40. In contrast, IL-10 inhibited IL-12 production in both activation systems. We conclude that IL-10 differentially influences LPS-dependent and CD40-dependent pathways of DC maturation.
authors.affiliation: Department of Immunology, Hôpital Erasme, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Buelens
authors.forename: V
authors.initials: V
authors.lastname: Verhasselt
authors.forename: D
authors.initials: D
authors.lastname: De Groote
authors.forename: K
authors.initials: K
authors.lastname: Thielemans
authors.forename: M
authors.initials: M
authors.lastname: Goldman
authors.forename: F
authors.initials: F
authors.lastname: Willems
mesh_terms: D015703:Antigens, CD / Q000378:metabolism; D051940:B7-2 Antigen; D019013:CD40 Antigens / Q000378:metabolism*; D023201:CD40 Ligand; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects* / Q000276:immunology*; D006801:Humans; D007136:Immunoglobulins / Q000096:biosynthesis; D066298:In Vitro Techniques; D016753:Interleukin-10 / Q000494:pharmacology*; D018664:Interleukin-12 / Q000096:biosynthesis; D016209:Interleukin-8 / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008562:Membrane Glycoproteins / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D014162:Transfection; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis; D000097802:CD83 Antigen
chemical_list: D015703:Antigens, CD; D051940:B7-2 Antigen; D019013:CD40 Antigens; D023201:CD40 Ligand; D007136:Immunoglobulins; D016753:Interleukin-10; D018664:Interleukin-12; D016209:Interleukin-8; D008070:Lipopolysaccharides; D008562:Membrane Glycoproteins; D014409:Tumor Necrosis Factor-alpha; D000097802:CD83 Antigen; C497964:CD86 protein, human