Discovery of GluN2A-Selective NMDA Receptor Positive Allosteric Modulators (PAMs): Tuning Deactivation Kinetics via Structure-Based Design
作者:Matthew Volgraf、Benjamin D. Sellers、Yu Jiang、Guosheng Wu、Cuong Q. Ly、Elisia Villemure、Richard M. Pastor、Po-wai Yuen、Aijun Lu、Xifeng Luo、Mingcui Liu、Shun Zhang、Liang Sun、Yuhong Fu、Patrick J. Lupardus、Heidi J.A. Wallweber、Bianca M. Liederer、Gauri Deshmukh、Emile Plise、Suzanne Tay、Paul Reynen、James Herrington、Amy Gustafson、Yichin Liu、Akim Dirksen、Matthias G. A. Dietz、Yanzhou Liu、Tzu-Ming Wang、Jesse E. Hanson、David Hackos、Kimberly Scearce-Levie、Jacob B. Schwarz
DOI:10.1021/acs.jmedchem.5b02010
日期:2016.3.24
The N-methyl-D-aspartate receptor (NMDAR) is a Na+ and Ca2+ permeable ionotropic glutamate receptor that is activated by the coagonists glycine and glutamate. NMDARs are critical to synaptic signaling and plasticity, and their dysfunction has been implicated in a number of neurological disorders, including schizophrenia, depression, and Alzheimer's disease. Herein we describe the discovery of potent GluN2A-selective NMDAR positive allosteric modulators (PAMs) starting from a high-throughput screening hit. Using structure-based design, we sought to increase potency at the GluN2A subtype, while improving selectivity against related amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors (AMPARs). The structure activity relationship of channel deactivation kinetics was studied using a combination of electrophysiology and protein crystallography. Effective incorporation of these strategies resulted in the discovery of GNE-0723 (46), a highly potent and brain penetrant GluN2A-selective NMDAR PAM suitable for in vivo characterization.