Aminothiazole-featured pirinixic acid derivatives as dual 5-lipoxygenase and microsomal prostaglandin E2 synthase-1 inhibitors with improved potency and efficiency in vivo.

Journal of medicinal chemistry

PubMedID: 24171493

Hanke T, Dehm F, Liening S, Popella SD, Maczewsky J, Pillong M, Kunze J, Weinigel C, Barz D, Kaiser A, Wurglics M, Lämmerhofer M, Schneider G, Sautebin L, Schubert-Zsilavecz M, Werz O. Aminothiazole-featured pirinixic acid derivatives as dual 5-lipoxygenase and microsomal prostaglandin E2 synthase-1 inhibitors with improved potency and efficiency in vivo. J Med Chem. 2013;.
Dual inhibition of microsomal prostaglandin E2 synthase-1 (mPGES-1) and 5-lipoxygenase (5-LO) is currently pursued as potential pharmacological strategy for treatment of inflammation and cancer. Here we present a series of 26 novel 2-aminothiazole-featured pirinixic acid derivatives as dual 5-LO/mPGES-1 inhibitors with improved potency (exemplified by compound 16 (2-[(4-chloro-6-{[4-(naphthalen-2-yl)-1,3-thiazol-2-yl]amino}pyrimidin-2-yl)sulfanyl]octanoic acid) with IC50 = 0.3 and 0.4 µM, respectively) and bioactivity in vivo. Computational analysis presumes binding sites of 16 at the tip of the 5-LO catalytic domain and within a sub-pocket of the mPGES-1 active site. Compound 16 (10 µM) hardly suppressed cyclooxygenase (COX)-1/2 activities, failed to inhibit 12/15-LOs, and is devoid of radical scavenger properties. Finally, compound 16 reduced vascular permeability and inflammatory cell infiltration in a zymosan-induced mouse peritonitis model accompanied by impaired levels of cysteinyl-leukotrienes and prostaglandin E2. Together, 2-aminothiazole-featured pirinixic acids represent potent dual 5-LO/mPGES-1 inhibitors with an attractive pharmacological profile as anti-inflammatory drugs.