Discovery and Optimization of Potent and CNS Penetrant M5-Preferring Positive Allosteric Modulators Derived from a Novel, Chiral N-(Indanyl)piperidine Amide Scaffold

Aaron M Bender, Hyekyung P Cho, Kellie D Nance, Kaelyn S Lingenfelter, Vincent B Luscombe, Patrick R Gentry, Karl Voigtritter, Alice E Berizzi, Patrick M Sexton, Christopher J Langmead, Arthur Christopoulos, Charles W Locuson, Thomas M Bridges, Sichen Chang, Jordan C O'Neill, Xiaoyan Zhan, Colleen M Niswender, Carrie K Jones, P Jeffrey Conn, Craig W Lindsley

3 Citationer (Scopus)

Abstract

The pharmacology of the M 5 muscarinic acetylcholine receptor (mAChR) is the least understood of the five mAChR subtypes due to a historic lack of selective small molecule tools. To address this shortcoming, we have continued the optimization effort around the prototypical M 5 positive allosteric modulator (PAM) ML380 and have discovered and optimized a new series of M 5 PAMs based on a chiral N-(indanyl)piperidine amide core with robust SAR, human and rat M 5 PAM EC 50 values <100 nM and rat brain/plasma K p values of ∼0.40. Interestingly, unlike M 1 and M 4 PAMs with unprecedented mAChR subtype selectivity, this series of M 5 PAMs displayed varying degrees of PAM activity at the other two natively G q -coupled mAChRs, M 1 and M 3 , yet were inactive at M 2 and M 4 .

OriginalsprogEngelsk
TidsskriftACS Chemical Neuroscience
Vol/bind9
Udgave nummer7
Sider (fra-til)1572-1581
Antal sider10
ISSN1948-7193
DOI
StatusUdgivet - 18 jul. 2018
Udgivet eksterntJa

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