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 .
Originalsprog | Engelsk |
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Tidsskrift | ACS Chemical Neuroscience |
Vol/bind | 9 |
Udgave nummer | 7 |
Sider (fra-til) | 1572-1581 |
Antal sider | 10 |
ISSN | 1948-7193 |
DOI | |
Status | Udgivet - 18 jul. 2018 |
Udgivet eksternt | Ja |