PMID: 28190634

Authors:

Partridge KM, Antonysamy S, Bhattachar SN, Chandrasekhar S, Fisher MJ, Fretland A, Gooding K, Harvey A, Hughes NE, Kuklish SL, Luz JG, Manninen PR, McGee JE, Mudra DR, Navarro A, Norman BH, Quimby SJ, Schiffler MA, Sloan AV, Warshawsky AM, Weller JM, York JS, Yu XP

Title:

Discovery and characterization of [(cyclopentyl)ethyl]benzoic acid inhibitors of microsomal prostaglandin E synthase-1.

Journal:

Bioorg Med Chem Lett. 2017 Mar 15;27(6):1478-1483. doi:, 10.1016/j.bmcl.2016.11.011. Epub 2016 Nov 7.

Abstract:

We describe a novel class of acidic mPGES-1 inhibitors with nanomolar enzymatic and human whole blood (HWB) potency. Rational design in conjunction with structure-based design led initially to the identification of anthranilic acid 5, an mPGES-1 inhibitor with micromolar HWB potency. Structural modifications of 5 improved HWB potency by over 1000x, reduced CYP2C9 single point inhibition, and improved rat clearance, which led to the selection of [(cyclopentyl)ethyl]benzoic acid compound 16 for clinical studies. Compound 16 showed an IC80 of 24nM for inhibition of PGE2 formation in vitro in LPS-stimulated HWB. A single oral dose resulted in plasma concentrations of 16 that exceeded its HWB IC80 in both rat (5mg/kg) and dog (3mg/kg) for over twelve hours.