The molecular pharmacology and in vivo activity of 2-(4-chloro-6-(2,3-dimethylphenylamino)pyrimidin-2-ylthio)octanoic acid (YS121), a dual inhibitor of microsomal prostaglandin E2 synthase-1 and 5-lipoxygenase

The Journal of Pharmacology and Experimental Therapeutics
A KoeberleOliver Werz

Abstract

The microsomal prostaglandin E(2) synthase (mPGES)-1 is one of the terminal isoenzymes of prostaglandin (PG) E(2) biosynthesis. Pharmacological inhibitors of mPGES-1 are proposed as an alternative to nonsteroidal anti-inflammatory drugs. We recently presented the design and synthesis of a series of pirinixic acid derivatives that dually inhibit mPGES-1 and 5-lipoxygenase. Here, we investigated the mechanism of mPGES-1 inhibition, the selectivity profile, and the in vivo activity of alpha-(n-hexyl)-substituted pirinixic acid [YS121; 2-(4-chloro-6-(2,3-dimethylphenylamino)pyrimidin-2-ylthio)octanoic acid)] as a lead compound. In cell-free assays, YS121 inhibited human mPGES-1 in a reversible and noncompetitive manner (IC(50) = 3.4 muM), and surface plasmon resonance spectroscopy studies using purified in vitro-translated human mPGES-1 indicate direct, reversible, and specific binding to mPGES-1 (K(D) = 10-14 muM). In lipopolysaccharide-stimulated human whole blood, PGE(2) formation was concentration dependently inhibited (IC(50) = 2 muM), whereas concomitant generation of the cyclooxygenase (COX)-2-derived thromboxane B(2) and 6-keto PGF(1alpha) and the COX-1-derived 12(S)-hydroxy-5-cis-8,10-trans-heptadecatrienoic acid was not s...Continue Reading

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Citations

Sep 21, 2013·Prostaglandins & Other Lipid Mediators·Patrick LeclercPer-Johan Jakobsson
Feb 7, 2012·Inflammation and Regeneration·Fumiaki KojimaLeslie J Crofford
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Jan 23, 2016·Journal of Medicinal Chemistry·Andreas KoeberleOliver Werz
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