Pharmacodynamic behaviour of the selective cyclooxygenase-2 inhibitor lumiracoxib in the lipopolysaccharide-stimulated rat air pouch model.
Esser, Ronald, Miserendino-Molteni, Rocca, Sharr, Michele, Zhang, Xiaoli, Porter, Wilma, Ramos, Luis, Cramer, Jeffrey, Zhuang, Shumin, Georgieva, Anna and Maniara, Wieslawa (2005) Pharmacodynamic behaviour of the selective cyclooxygenase-2 inhibitor lumiracoxib in the lipopolysaccharide-stimulated rat air pouch model. European Journal of Pharmaceutical Sciences : official journal of the European Federation for Pharmaceutical Sciences, 25 (1). pp. 25-30. ISSN 0928-0987
Abstract
PURPOSE: To investigate the pharmacodynamic behaviour of the selective cyclooxygenase-2 inhibitor, lumiracoxib, in the rat air pouch. METHODS: Air pouches were injected with lipopolysaccharide to stimulate prostaglandin E2 (PGE2) production 1h after lumiracoxib treatment. Pouch fluid samples were collected 6 or 24 h after lumiracoxib administration to measure PGE2 levels. Lumiracoxib concentrations in pouch fluid and plasma were measured by mass spectrometry. RESULTS: Oral administration of lumiracoxib resulted in dose-dependent inhibition of PGE2 production 6 and 24 h post-dose. The estimated ED50 values for inhibition of PGE2 production were 0.1 and 2.0 mg/kg at 6 and 24 h, respectively. Lumiracoxib concentrations in plasma and pouch fluid increased in proportion to dose. There was a strong positive correlation between lumiracoxib concentrations in plasma and pouch fluid compartments. Lumiracoxib concentrations were higher in plasma than in pouch fluid 6 h post-dose, but at 24 h post-dose, pouch fluid concentrations were > or =4-fold greater than plasma concentrations. CONCLUSIONS: Lumiracoxib readily enters the air pouch and persists in this extravascular compartment for a longer period of time than in plasma. This distribution profile may contribute to the ability of lumiracoxib to inhibit PGE2 production up to 24 h after dosing.
Item Type: | Article |
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Additional Information: | author can archive post-print (ie final draft post-refereeing); Publisher's version/PDF cannot be used |
Keywords: | Lumiracoxib; Pharmacodynamics; Cyclooxygenase-2; Prostaglandin E2 |
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Date Deposited: | 14 Dec 2009 13:56 |
Last Modified: | 31 Jan 2013 01:11 |
URI: | https://oak.novartis.com/id/eprint/643 |