title: Treatment with N-tosyl-l-phenylalanine chloromethyl ketone after the onset of collagen-induced arthritis reduces joint erosion and NF-kappaB activation.
abstract: N-tosyl-l-phenylalanine chloromethyl ketone (TPCK) is known to inhibit NF-kappaB activation and the expression of inflammation mediators in cultured cells. We measured the potential of TPCK to inhibit the pathogenesis of collagen-induced arthritis by blocking NF-kappaB activation. Arthritis was induced in DBA/1J mice by the injection of bovine type II collagen in adjuvant on days 0 and 14. Mice received either TPCK (3 or 10 mg/kg, i.p.) or vehicle three times a week for 3 weeks starting on day 21. TPCK moderately reduced clinical disease activity scores, whereas it markedly suppressed histological indications of joint destruction. In vitro production of tumor necrosis factor-alpha, interleukin-6, and monocyte chemotactic protein-1 from lipopolysaccharide-stimulated spleen cells was also reduced by in vivo treatment with TPCK. Proliferation of cells isolated from spleen or draining lymph nodes and production of interferon-gamma and interleukin-17 in response to stimulation with type II collagen was decreased by TPCK. Moreover, nuclear NF-kappaB activity induced by collagen immunization was significantly reduced in mice treated with TPCK. Finally, osteoclast differentiation of bone marrow cells induced by macrophage colony-stimulating factor and receptor activator of NF-kappaB ligand was completely inhibited by TPCK. These results indicate that TPCK attenuates collagen-induced arthritis and bone erosion by suppressing NF-kappaB activation and thus expression of inflammatory and osteoclastogenic genes.
authors.affiliation: Department of Biochemistry, College of Medicine, The Catholic University of Korea, Republic of Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Choi
authors.forename: Kyung-Ho
authors.initials: KH
authors.lastname: Ha
authors.forename: Mi-Sun
authors.initials: MS
authors.lastname: Byun
authors.forename: So Youn
authors.initials: SY
authors.lastname: Min
authors.forename: Min-Jung
authors.initials: MJ
authors.lastname: Park
authors.forename: Hyun-Sil
authors.initials: HS
authors.lastname: Park
authors.forename: Hye-Joa
authors.initials: HJ
authors.lastname: Oh
authors.forename: Ji Hyeon
authors.initials: JH
authors.lastname: Ju
authors.forename: Ho-Youn
authors.initials: HY
authors.lastname: Kim
authors.forename: Dae-Myung
authors.initials: DM
authors.lastname: Jue
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D001169:Arthritis, Experimental / Q000188:drug therapy* / Q000276:immunology / Q000473:pathology; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D016207:Cytokines / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D007596:Joints / Q000187:drug effects* / Q000276:immunology / Q000473:pathology; D008213:Lymphocyte Activation / Q000187:drug effects; D008297:Male; D051379:Mice; D008811:Mice, Inbred DBA; D016328:NF-kappa B / Q000037:antagonists & inhibitors* / Q000378:metabolism; D010010:Osteoclasts / Q000187:drug effects* / Q000276:immunology / Q000473:pathology; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology; D014108:Tosylphenylalanyl Chloromethyl Ketone / Q000494:pharmacology*
chemical_list: D000893:Anti-Inflammatory Agents; D016207:Cytokines; D016328:NF-kappa B; D014108:Tosylphenylalanyl Chloromethyl Ketone