title: Evaluation of classical NSAIDs and COX-2 selective inhibitors on purified ovine enzymes and human whole blood.
abstract: Cyclooxygenase is the key enzyme in the biosynthesis of prostanoids, biologically active substances involved in several physiological processes and also in pathological conditions such as inflammation. It has been well known for 10 years that this enzyme exists under two forms: a constitutive (COX-1) and an inducible form (COX-2). Both enzymes are sensitive to inhibition by conventional non-steroidal anti-inflammatory drugs (NSAIDs). Observations were made that COX-1 was mainly involved in homeostatic processes, while the COX-2 expression was associated with pathological conditions leading to the development of COX-2 selective inhibitors. Several methods have been reported for the evaluation of the COX-1 and COX-2 inhibitory potency and selectivity of conventional or COX-2 selective NSAIDs. In this study, we evaluated the COXs inhibitory profile of both conventional NSAIDs and COX-2 selective inhibitors using two different in vitro methods: the first test was performed using purified enzymes while the second method consisted of a whole blood assay. The results obtained with reference drugs in these two assays will be discussed and compared in this article.
authors: Department of Medicinal Chemistry, University of Liège, Liège, B-4000, Belgium. xdeleval@student.ulg.ac.be
authors: X
authors: X
authors: de Leval
authors: J
authors: J
authors: Delarge
authors: P
authors: P
authors: Devel
authors: P
authors: P
authors: Neven
authors: C
authors: C
authors: Michaux
authors: B
authors: B
authors: Masereel
authors: B
authors: B
authors: Pirotte
authors: J L
authors: JL
authors: David
authors: Y
authors: Y
authors: Henrotin
authors: J M
authors: JM
authors: Dogne
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D006801:Humans; D007249:Inflammation / Q000378:metabolism; D020128:Inhibitory Concentration 50; D007527:Isoenzymes / Q000037:antagonists & inhibitors* / Q000097:blood; D008565:Membrane Proteins; D008956:Models, Chemical; D011451:Prostaglandin-Endoperoxide Synthases / Q000097:blood; D012756:Sheep
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D004791:Enzyme Inhibitors; D007527:Isoenzymes; D008565:Membrane Proteins; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; C496511:PTGS1 protein, human; C496540:PTGS2 protein, human; D011451:Prostaglandin-Endoperoxide Synthases