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ID: ALA4715808
Journal: J Med Chem
Title: Discovery of (1S,2R,3S,4S,5R,6R)-2-Amino-3-[(3,4-difluorophenyl)sulfanylmethyl]-4-hydroxy-bicyclo[3.1.0]hexane-2,6-dicarboxylic Acid Hydrochloride (LY3020371·HCl): A Potent, Metabotropic Glutamate 2/3 Receptor Antagonist with Antidepressant-Like Activity.
Authors: Chappell MD,Li R,Smith SC,Dressman BA,Tromiczak EG,Tripp AE,Blanco MJ,Vetman T,Quimby SJ,Matt J,Britton TC,Fivush AM,Schkeryantz JM,Mayhugh D,Erickson JA,Bures MG,Jaramillo C,Carpintero M,Diego JE,Barberis M,Garcia-Cerrada S,Soriano JF,Antonysamy S,Atwell S,MacEwan I,Condon B,Sougias C,Wang J,Zhang A,Conners K,Groshong C,Wasserman SR,Koss JW,Witkin JM,Li X,Overshiner C,Wafford KA,Seidel W,Wang XS,Heinz BA,Swanson S,Catlow JT,Bedwell DW,Monn JA,Mitch CH,Ornstein PL
Abstract: As part of our ongoing efforts to identify novel ligands for the metabotropic glutamate 2 and 3 (mGlu) receptors, we have incorporated substitution at the C3 and C4 positions of the (1S,2R,5R,6R)-2-amino-bicyclo[3.1.0]hexane-2,6-dicarboxylic acid scaffold to generate mGlu antagonists. Exploration of this structure-activity relationship (SAR) led to the identification of (1S,2R,3S,4S,5R,6R)-2-amino-3-[(3,4-difluorophenyl)sulfanylmethyl]-4-hydroxy-bicyclo[3.1.0]hexane-2,6-dicarboxylic acid hydrochloride (LY3020371·HCl, 19f), a potent, selective, and maximally efficacious mGlu antagonist. Further characterization of compound 19f binding to the human metabotropic 2 glutamate (hmGlu) site was established by cocrystallization of this molecule with the amino terminal domain (ATD) of the hmGlu receptor protein. The resulting cocrystal structure revealed the specific ligand-protein interactions, which likely explain the high affinity of 19f for this site and support its functional mGlu antagonist pharmacology. Further characterization of 19f in vivo demonstrated an antidepressant-like signature in the mouse forced-swim test (mFST) assay when brain levels of this compound exceeded the cellular mGlu IC value.
CiteXplore: 28002967