title: Auranofin inhibits interleukin-1beta-induced transcript of cyclooxygenase-2 on cultured human synoviocytes.
abstract: The aim of this study was to characterize the effects of auranofin (2,3,4,6-tetra-O-acetyl-l-thio-beta-D-gluco-pyranosato-S) on cyclooxygenase expression and prostaglandin E(2) synthesis on cultured human synovial fibroblast-like cells (synoviocytes). Synoviocytes were treated with auranofin in the presence or absence of interleukin-1beta. Cultured supernatants were harvested for prostaglandin E(2) synthesis. Cyclooxygenase-1 and -2 expression was analyzed with Western and Northern blotting. Translocation of nuclear factor-kappa B p65 was determined by immunostaining. Cytotoxicity was measured with 51Cr release assay. Auranofin attenuated interleukin-1beta-induced prostaglandin E(2) production of the cells in a dose-dependent fashion. Auranofin selectively suppressed interleukin-1beta-induced cyclooxygenase-2 mRNA and protein expression of the cells without alteration of cyclooxygenase-1 expression. Also, auranofin interfered with interleukin-1beta-induced translocation of nuclear factor-kappa B. These inhibitory effects did not originate in the cytotoxicity of the agent. Our data indicate that auranofin inhibits interleukin-1beta-induced prostaglandin E(2) synthesis and cyclooxygenase-2 expression via suppression of nuclear factor-kappa B activation on synoviocytes.
authors.affiliation: First Department of Internal Medicine, Kyoto Prefectural University of Medicine, 465 Kajiicho, Kamigyo-ku, Kyoto, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Yamada
authors.forename: H
authors.initials: H
authors.lastname: Sano
authors.forename: T
authors.initials: T
authors.lastname: Hla
authors.forename: A
authors.initials: A
authors.lastname: Hashiramoto
authors.forename: W
authors.initials: W
authors.lastname: Fukui
authors.forename: S
authors.initials: S
authors.lastname: Miyazaki
authors.forename: M
authors.initials: M
authors.lastname: Kohno
authors.forename: Y
authors.initials: Y
authors.lastname: Tsubouchi
authors.forename: Y
authors.initials: Y
authors.lastname: Kusaka
authors.forename: M
authors.initials: M
authors.lastname: Kondo
mesh_terms: D001310:Auranofin / Q000494:pharmacology*; D015152:Blotting, Northern; D015153:Blotting, Western; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D002860:Chromium Radioisotopes / Q000378:metabolism; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D003907:Dexamethasone / Q000494:pharmacology; D015232:Dinoprostone / Q000096:biosynthesis; D004305:Dose-Response Relationship, Drug; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D006801:Humans; D007375:Interleukin-1 / Q000494:pharmacology*; D007527:Isoenzymes / Q000235:genetics* / Q000378:metabolism; D008565:Membrane Proteins; D016328:NF-kappa B / Q000187:drug effects / Q000378:metabolism; D011451:Prostaglandin-Endoperoxide Synthases / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D013583:Synovial Membrane / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology; D014158:Transcription, Genetic / Q000187:drug effects
chemical_list: D002860:Chromium Radioisotopes; D007375:Interleukin-1; D007527:Isoenzymes; D008565:Membrane Proteins; D016328:NF-kappa B; D012333:RNA, Messenger; D001310:Auranofin; D003907:Dexamethasone; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; C496511:PTGS1 protein, human; C496540:PTGS2 protein, human; D011451:Prostaglandin-Endoperoxide Synthases; D015232:Dinoprostone