title: The effect of a T cell-specific NF-kappa B inhibitor on in vitro cytokine production and collagen-induced arthritis.
abstract: NF-kappa B plays a key role in the production of cytokines in inflammatory diseases. The effects of a novel T cell-specific NF-kappa B inhibitor, SP100030, were evaluated in cultured Jurkat cells and in murine collagen-induced arthritis (CIA). Chemical libraries were screened for NF-kappa B-inhibitory activity. SP100030, a compound identified in this process, inhibited NF-kappa B activation in PMA/PHA-activated Jurkat cells by EMSA at a concentration of 1 microM. Jurkat cells and the monocytic cell line THP-1 were transfected with an NF-kappa B promotor/luciferase construct and activated. SP100030 inhibited luciferase production in the Jurkat cells (IC50 = 30 nM). ELISA and RT-PCR confirmed that IL-2, IL-8, and TNF-alpha production by activated Jurkat and other T cell lines were inhibited by SP100030. However, cytokine expression was not blocked by the compound in THP-1 cells, fibroblasts, endothelial cells, or epithelial cells. Subsequently, DBA/1J mice were immunized with type II collagen. Treatment with SP100030 (10 mg/kg/day i.p. beginning on day 21) significantly decreased arthritis severity from onset of clinical signs to the end of the study on day 34 (arthritis score, 5.6 +/- 1.7 for SP100030 and 9.8 +/- 1.5 for control; p < 0.001). Histologic evaluation demonstrated a trend toward improvement in SP100030-treated animals. EMSA of arthritic mouse ankles in CIA showed that synovial NF-kappa B binding was suppressed in the SP100030-treated mice. SP100030 inhibits NF-kappa B activation in T cells, resulting in reduced NF-kappa B-regulated gene expression and decreased CIA. Its selectivity for T cells could provide potent immunosuppression with less toxicity than other NF-kappa B inhibitors.
authors.affiliation: Division of Rheumatology, Allergy and Immunology, University of California, San Diego School of Medicine, La Jolla, CA 92093, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Gerlag
authors.forename: L
authors.initials: L
authors.lastname: Ransone
authors.forename: P P
authors.initials: PP
authors.lastname: Tak
authors.forename: Z
authors.initials: Z
authors.lastname: Han
authors.forename: M
authors.initials: M
authors.lastname: Palanki
authors.forename: M S
authors.initials: MS
authors.lastname: Barbosa
authors.forename: D
authors.initials: D
authors.lastname: Boyle
authors.forename: A M
authors.initials: AM
authors.lastname: Manning
authors.forename: G S
authors.initials: GS
authors.lastname: Firestein
mesh_terms: D000818:Animals; D001169:Arthritis, Experimental / Q000276:immunology* / Q000378:metabolism / Q000517:prevention & control; D003094:Collagen / Q000276:immunology*; D016207:Cytokines / Q000096:biosynthesis* / Q000235:genetics; D004247:DNA / Q000187:drug effects / Q000378:metabolism; D004306:Dose-Response Relationship, Immunologic; D018984:Epitopes, T-Lymphocyte / Q000276:immunology*; D005786:Gene Expression Regulation / Q000187:drug effects / Q000276:immunology; D006801:Humans; D007166:Immunosuppressive Agents / Q000494:pharmacology* / Q000627:therapeutic use; D019169:Jurkat Cells / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D008297:Male; D051379:Mice; D008811:Mice, Inbred DBA; D016328:NF-kappa B / Q000037:antagonists & inhibitors* / Q000378:metabolism / Q000502:physiology; D009930:Organic Chemicals; D011485:Protein Binding / Q000187:drug effects / Q000276:immunology; D013583:Synovial Membrane / Q000187:drug effects / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism; D014407:Tumor Cells, Cultured; D000813:Anilides; D001549:Benzamides; D011743:Pyrimidines
chemical_list: D003094:Collagen; D016207:Cytokines; D004247:DNA; D018984:Epitopes, T-Lymphocyte; D007166:Immunosuppressive Agents; D016328:NF-kappa B; D009930:Organic Chemicals; C102914:N-(3,5-bis(trifluoromethyl)phenyl)-2-chloro-4-(trifluoromethyl)pyrimidine-5-carboxamide; D000813:Anilides; D001549:Benzamides; D011743:Pyrimidines