title: 1 alpha,25-Dihydroxyvitamin D3 and a novel vitamin D analogue MC 903 are potent inhibitors of human interleukin 1 in vitro.
abstract: 1 alpha,25-dihydroxycholecalciferol (1,25(OH)2D3) inhibits the lymphocyte growth hormone, interleukin 2. Since its production is dependent upon interleukin 1 (IL-1) produced by antigen-presenting cells, we tested five vitamin D3 analogues for effects on the production and function of human natural and recombinant IL-1. The production was not affected, but 1,25(OH)2D3 (greater than 10(-11) M) and a synthetic derivative MC 903 (greater than = 10(-10) M) inhibited the proliferation of mouse thymocytes to IL-1. The vitamins failed to affect the cytotoxic activity of tumor necrosis factor. 1,25(OH)2D3 may play a physiological immunomodulatory role as a selective inhibitor of the function of IL-1, and MC 903 may prove clinically useful in this regard because of its limited calcium metabolic activity.
authors.affiliation: Laboratory of Medical Immunology, Rigshospitalet, Copenhagen, Denmark.
authors.forename: K
authors.initials: K
authors.lastname: Muller
authors.forename: M
authors.initials: M
authors.lastname: Svenson
authors.forename: K
authors.initials: K
authors.lastname: Bendtzen
mesh_terms: D000818:Animals; D002117:Calcitriol / Q000031:analogs & derivatives* / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007375:Interleukin-1 / Q000276:immunology* / Q000494:pharmacology; D008213:Lymphocyte Activation / Q000187:drug effects; D051379:Mice; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology
chemical_list: D007375:Interleukin-1; C055085:calcipotriene; D002117:Calcitriol