title: Biological activity of 26,26,26,27,27,27-hexafluorinated analogs of vitamin D3 in inhibiting interleukin-2 production by peripheral blood mononuclear cells stimulated by phytohemagglutinin.
abstract: Vitamin D compounds suppress the production of interleukin-2 (IL-2) by peripheral blood mononuclear cells (PBMCs) stimulated with phytohemagglutinin in a dose-dependent manner. We used this suppression to test 26,26,26,27,27,27-hexafluorinated analogs of vitamin D3 for their immunosuppressive activity in PBMCs. 26,26,26,27,27,27-Hexafluoro-1,25-dihydroxyvitamin D3 and 26,26,26,27,27,27-hexafluoro-1,24-dihydroxyvitamin D3 were approximately 10 times more potent than 1,25-dihydroxyvitamin D3 in suppressing IL-2 production. 26,26,26,27,27,27-Hexafluoro-1-hydroxyvitamin D3 was 20 to 30 times less potent than 1,25-dihydroxyvitamin D3 in causing this effect. The relative biopotency of each vitamin D3 analog toward PBMC proliferation was roughly similar to that toward IL-2 production by PBMCs. Suppression of PBMC proliferation by vitamin D3 analogs seemed to be a secondary effect of their inhibition of IL-2 production.
authors.affiliation: Second Department of Internal Medicine, Osaka City University Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yukioka
authors.forename: S
authors.initials: S
authors.lastname: Otani
authors.forename: I
authors.initials: I
authors.lastname: Matsui-Yuasa
authors.forename: H
authors.initials: H
authors.lastname: Goto
authors.forename: S
authors.initials: S
authors.lastname: Morisawa
authors.forename: S
authors.initials: S
authors.lastname: Okuno
authors.forename: M
authors.initials: M
authors.lastname: Inaba
authors.forename: Y
authors.initials: Y
authors.lastname: Nishizawa
authors.forename: H
authors.initials: H
authors.lastname: Morii
mesh_terms: D002117:Calcitriol / Q000031:analogs & derivatives* / Q000494:pharmacology*; D004306:Dose-Response Relationship, Immunologic; D005461:Fluorine; D006801:Humans; D007166:Immunosuppressive Agents / Q000494:pharmacology*; D007376:Interleukin-2 / Q000096:biosynthesis*; D008213:Lymphocyte Activation / Q000187:drug effects*; D008214:Lymphocytes / Q000378:metabolism; D010835:Phytohemagglutinins / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D007166:Immunosuppressive Agents; D007376:Interleukin-2; D010835:Phytohemagglutinins; D005461:Fluorine; D002117:Calcitriol