title: 15-Deoxy-delta12,14-PGJ2, but not troglitazone, modulates IL-1beta effects in human chondrocytes by inhibiting NF-kappaB and AP-1 activation pathways.
abstract: The activation of peroxisome proliferator-activated receptor gamma (PPARgamma) has been shown to inhibit the production and the effects of proinflammatory cytokines. Since interleukin-1beta (IL-1beta) directly mediates cartilage degradation in osteoarthritis, we investigated the capability of PPARgamma ligands to modulate IL-1beta effects on human chondrocytes. RT-PCR and Western blot analysis revealed that PPARgamma expression was decreased by IL-1beta. 15-deoxy-Delta12,14-prostaglandin J2 (15d-PGJ2), in contrast to troglitazone, was highly potent to counteract IL-1beta-induced cyclooxygenase-2 and inductible nitric oxide synthase expression, NO production and the decrease in proteoglycan synthesis. Western blot and gel-shift analyses demonstrated that 15d-PGJ2 inhibited NF-kappaB activation, while troglitazone was ineffective. Although 15d-PGJ2 attenuated activator protein-1 binding on the DNA, it potentiated c-jun migration in the nucleus. The absence or the low effect of troglitazone suggests that 15d-PGJ2 action in human chondrocytes is mainly PPARgamma-independent.
authors.affiliation: Laboratoire de Pharmacologie, UMR 7561 CNRS-Université Henri Poincaré Nancy I, Faculté de Médecine, Vandoeuvre-lès-Nancy, France.
authors.forename: S
authors.initials: S
authors.lastname: Boyault
authors.forename: M A
authors.initials: MA
authors.lastname: Simonin
authors.forename: A
authors.initials: A
authors.lastname: Bianchi
authors.forename: E
authors.initials: E
authors.lastname: Compe
authors.forename: B
authors.initials: B
authors.lastname: Liagre
authors.forename: D
authors.initials: D
authors.lastname: Mainard
authors.forename: P
authors.initials: P
authors.lastname: Bécuwe
authors.forename: M
authors.initials: M
authors.lastname: Dauça
authors.forename: P
authors.initials: P
authors.lastname: Netter
authors.forename: B
authors.initials: B
authors.lastname: Terlain
authors.forename: K
authors.initials: K
authors.lastname: Bordji
mesh_terms: D021581:Active Transport, Cell Nucleus / Q000187:drug effects; D015153:Blotting, Western; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism; D002478:Cells, Cultured; D019902:Chondrocytes / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D002839:Chromans / Q000494:pharmacology*; D051546:Cyclooxygenase 2; D004247:DNA / Q000235:genetics / Q000378:metabolism; D004790:Enzyme Induction / Q000187:drug effects; D005786:Gene Expression Regulation / Q000187:drug effects*; D006801:Humans; D007375:Interleukin-1 / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D007527:Isoenzymes / Q000235:genetics; D008024:Ligands; D008565:Membrane Proteins; D016328:NF-kappa B / Q000378:metabolism*; D009569:Nitric Oxide / Q000378:metabolism; D019001:Nitric Oxide Synthase / Q000235:genetics; D052247:Nitric Oxide Synthase Type II; D015230:Prostaglandin D2 / Q000031:analogs & derivatives / Q000494:pharmacology*; D011451:Prostaglandin-Endoperoxide Synthases / Q000235:genetics; D011453:Prostaglandins / Q000096:biosynthesis; D011485:Protein Binding / Q000187:drug effects; D011509:Proteoglycans / Q000096:biosynthesis; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects; D013844:Thiazoles / Q000494:pharmacology*; D045162:Thiazolidinediones; D018808:Transcription Factor AP-1 / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D000077288:Troglitazone
chemical_list: C097240:15-deoxy-delta(12,14)-prostaglandin J2; D002839:Chromans; D007375:Interleukin-1; D007527:Isoenzymes; D008024:Ligands; D008565:Membrane Proteins; D016328:NF-kappa B; D011453:Prostaglandins; D011509:Proteoglycans; D016755:Proto-Oncogene Proteins c-jun; D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear; D013844:Thiazoles; D045162:Thiazolidinediones; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D009569:Nitric Oxide; D004247:DNA; C496319:NOS2 protein, human; D019001:Nitric Oxide Synthase; D052247:Nitric Oxide Synthase Type II; D051546:Cyclooxygenase 2; C496540:PTGS2 protein, human; D011451:Prostaglandin-Endoperoxide Synthases; D000077288:Troglitazone; D015230:Prostaglandin D2