| Literature DB >> 26684851 |
Susana Conde-Ceide1, Jesús Alcázar1, Sergio A Alonso de Diego1, Silvia López1, María Luz Martín-Martín1, Carlos M Martínez-Viturro1, Miguel-Angel Pena1, Han Min Tong1, Hilde Lavreysen2, Claire Mackie3, Thomas M Bridges4, J Scott Daniels4, Colleen M Niswender4, Carrie K Jones4, Gregor J Macdonald2, Thomas Steckler2, P Jeffrey Conn4, Shaun R Stauffer4, Craig W Lindsley5, José Manuel Bartolomé-Nebreda6.
Abstract
As part of our efforts to identify a suitable back-up compound to our recently disclosed mGlu5 positive allosteric modulator (PAM) clinical candidate VU0490551/JNJ-46778212, this letter details the investigation and challenges of a novel series of 6,7-dihydropyrazolo[1,5-a]pyrazin-4-one derivatives. From these efforts, compound 4k emerged as a potent and selective mGlu5 PAM displaying overall attractive in vitro (pharmacological and ADMET) and PK profiles combined with in vivo efficacy in preclinical models of schizophrenia. However, further advancement of the compound was precluded due to severely limiting CNS-related side-effects confirming the previously reported association between excessive mGlu5 activation and target-related toxicities.Entities:
Keywords: Metabotropic glutamate receptor; N-Methyl-d-aspartate (NMDA); Positive allosteric modulator (PAM); Schizophrenia; mGlu(5)
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Year: 2015 PMID: 26684851 PMCID: PMC4835042 DOI: 10.1016/j.bmcl.2015.11.098
Source DB: PubMed Journal: Bioorg Med Chem Lett ISSN: 0960-894X Impact factor: 2.823