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Volgraf, Matthew; Sellers, Benjamin D; Jiang, Yu; Wu, Guosheng; Ly, Cuong Q; Villemure, Elisia; Pastor, Richard M; Yuen, Po-wai; Lu, Aijun; Luo, Xifeng; Liu, Mingcui; Zhang, Shun; Sun, Liang; Fu, Yuhong; Lupardus, Patrick J; Wallweber, Heidi J.A; Liederer, Bianca M; Deshmukh, Gauri; Plise, Emile; Tay, Suzanne; Reynen, Paul; Herrington, James; Gustafson, Amy; Liu, Yichin; Dirksen, Akim; Dietz, Matthias G. A; Liu, Yanzhou; Wang, Tzu-Ming; Hanson, Jesse E; Hackos, David; Scearce-Levie, Kimberly; Schwarz, Jacob B
Journal of medicinal chemistry, 03/2016, Volume: 59, Issue: 6Journal Article
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 α-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.
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