title: IL-1beta is essential for langerhans cell activation and antigen delivery to the lymph nodes during contact sensitization: evidence for a dermal source of IL-1beta.
abstract: IL-1beta(-/-) mice manifest an impaired contact hypersensitivity response to the hapten trinitrochlorobenzene, with the principle defect expressed during the sensitization phase of this response. Following application of hapten to the skin, epidermal Langerhans cells of IL-1beta(-/-) mice failed to demonstrate the classical phenotype of activation. In addition, the delivery of epicutaneously applied fluorescein isothiocyanate to draining lymph nodes was decreased in IL-1beta(-/-) mice. Hapten delivery to draining lymph nodes could be restored by intradermal injection of recombinant IL-1beta. Reconstitution of lethally irradiated IL-1beta(-/-) mice by transfer of wild-type bone marrow restored hapten-stimulated IL-1beta mRNA expression, demonstrating that IL-1beta production was dependent on bone marrow-derived cells. In wild-type skin, IL-1beta expression was upregulated in a time- and dose-dependent fashion following hapten application. Interestingly, prominent IL-1beta expressing cells were found in the dermis, suggesting that dermal cells may contribute significantly to the contact hypersensitivity response.
authors.affiliation: Department of Internal Medicine and Center for Immunology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
authors.forename: L P
authors.initials: LP
authors.lastname: Shornick
authors.forename: A K
authors.initials: AK
authors.lastname: Bisarya
authors.forename: D D
authors.initials: DD
authors.lastname: Chaplin
mesh_terms: D000818:Animals; D017951:Antigen Presentation / Q000276:immunology*; D001854:Bone Marrow Cells / Q000166:cytology / Q000276:immunology; D017690:Cell Transplantation; D020405:Dermis / Q000166:cytology / Q000276:immunology; D015870:Gene Expression; D006241:Haptens / Q000008:administration & dosage / Q000276:immunology; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D016130:Immunophenotyping; D007375:Interleukin-1 / Q000235:genetics / Q000276:immunology* / Q000494:pharmacology; D007801:Langerhans Cells / Q000276:immunology*; D008198:Lymph Nodes / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D012867:Skin / Q000166:cytology / Q000276:immunology*; D013194:Staining and Labeling
chemical_list: D006241:Haptens; D000949:Histocompatibility Antigens Class II; D007375:Interleukin-1