A Selective Prostaglandin E<sub>2</sub> Receptor Subtype 2 (EP2) Antagonist Increases the Macrophage-Mediated Clearance of Amyloid-Beta Plaques
作者:Brian M. Fox、Hilary P. Beck、Philip M. Roveto、Frank Kayser、Qingwen Cheng、Hannah Dou、Toni Williamson、James Treanor、Hantao Liu、Lixia Jin、Guifen Xu、Ji Ma、Songli Wang、Steven H. Olson
DOI:10.1021/acs.jmedchem.5b00567
日期:2015.7.9
A high-throughput screen resulted in the discovery of benzoxazepine 1, an EP2 antagonist possessing low microsomal stability and potent CYP3A4 inhibition. Modular optimization of lead compound 1 resulted in the discovery of benzoxazepine 52, a molecule with single-digit nM binding affinity for the EP2 receptor and significantly improved microsomal stability. It was devoid of CYP inhibition and was similar to 4000-fold selective against the other EP receptors. Compound 52 was shown to have good PK properties in CD-1 mice and high CNS permeability in C57Bl/6s mice and Sprague-Dawley rats. In an ex vivo assay, it demonstrated the ability to increase the macrophage-mediated clearance of amyloid-beta plaques from brain slices in a dose-dependent manner.