title: Cutting edge: Th2 response induction by dendritic cells: a role for CD40.
abstract: We investigated the influence of dendritic cell (DC) CD40 expression on Th2 and Th1 development by in vivo transfer of Ag-pulsed bone marrow-derived DC generated from wild-type (WT) or CD40(-/-) mice. Contrary to expectation, CD40(-/-) DC primed with Ag that inherently induce a Th2 response (soluble egg Ag from Schistosoma mansoni) failed to induce a Th2 response or any compensatory Th1 response, whereas CD40(-/-)DC primed with Ag that inherently induce a Th1 response (Propionibacterium acnes) generated a competent Th1 response. Thus, DC expression of CD40 is a prerequisite for initiation of Th2, but not Th1, responses by these Ag. Consistent with this, CD154(-/-) mice, unlike WT mice, failed to mount a Th2 response when directly injected with schistosome eggs but mounted a normal Th1 response after challenge with P. acnes. CD40-CD154 interaction can therefore play a major role in Th2 response induction.
authors.affiliation: Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
authors.forename: Andrew S
authors.initials: AS
authors.lastname: MacDonald
authors.forename: Amy D
authors.initials: AD
authors.lastname: Straw
authors.forename: Nicole M
authors.initials: NM
authors.lastname: Dalton
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Pearce
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000008:administration & dosage / Q000494:pharmacology; D000947:Antigens, Helminth / Q000008:administration & dosage / Q000494:pharmacology; D001854:Bone Marrow Cells / Q000276:immunology; D019013:CD40 Antigens / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D023201:CD40 Ligand / Q000378:metabolism; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000276:immunology*; D007279:Injections, Subcutaneous; D008213:Lymphocyte Activation / Q000276:immunology*; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D010063:Ovum / Q000276:immunology; D011425:Propionibacterium acnes / Q000276:immunology; D012550:Schistosoma mansoni / Q000276:immunology; D018417:Th1 Cells / Q000276:immunology / Q000378:metabolism; D018418:Th2 Cells / Q000276:immunology* / Q000378:metabolism
chemical_list: D000942:Antigens, Bacterial; D000947:Antigens, Helminth; D019013:CD40 Antigens; D016207:Cytokines; D023201:CD40 Ligand