title: Selective cyclo-oxygenase-2 inhibitors impair adipocyte differentiation through inhibition of the clonal expansion phase.
abstract: Selective cyclo-oxygenase-2 (COX-2) inhibitors are nonsteroidal antiinflammatory drugs used in the management of inflammatory diseases. We demonstrate here that inhibition of the COX-2 enzyme impairs adipocyte differentiation. The inhibition of adipogenesis occurs in the early clonal expansion phase. In particular, COX-2 inhibition limits cell cycle reentry required before terminal adipocyte differentiation. This inhibition of adipogenesis is independent of the production of the peroxisome proliferator activated receptor gamma ligand prostaglandin J2, but dependent on the production of proliferative prostaglandins, such as prostaglandin E2. Modulation of the activity of the COX-2 enzyme via COX-2 selective inhibitors might open up new perspectives in the control of obesity and related metabolic diseases.
authors.affiliation: Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, B. P. 163, F-67404 Illkirch cedex, C.U. de Strasbourg, France.
authors.forename: Lluis
authors.initials: L
authors.lastname: Fajas
authors.forename: Stephanie
authors.initials: S
authors.lastname: Miard
authors.forename: Michael R
authors.initials: MR
authors.lastname: Briggs
authors.forename: Johan
authors.initials: J
authors.lastname: Auwerx
mesh_terms: D016475:3T3 Cells; D017667:Adipocytes / Q000166:cytology* / Q000187:drug effects*; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology; D015153:Blotting, Western; D001973:Bromodeoxyuridine / Q000032:analysis; D002454:Cell Differentiation / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D002999:Clone Cells / Q000166:cytology* / Q000187:drug effects*; D019927:Cyclin E / Q000032:analysis / Q000096:biosynthesis; D051546:Cyclooxygenase 2; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology*; D005455:Fluorescent Antibody Technique; D007527:Isoenzymes / Q000037:antagonists & inhibitors*; D051379:Mice; D008934:Mitogens / Q000494:pharmacology; D011451:Prostaglandin-Endoperoxide Synthases; D018160:Receptors, Cytoplasmic and Nuclear / Q000819:agonists; D014157:Transcription Factors / Q000819:agonists
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D019927:Cyclin E; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors; D007527:Isoenzymes; D008934:Mitogens; D018160:Receptors, Cytoplasmic and Nuclear; D014157:Transcription Factors; D051546:Cyclooxygenase 2; D011451:Prostaglandin-Endoperoxide Synthases; D001973:Bromodeoxyuridine