Biochem/physiol Actions VU0238429 is a selective muscarinic acetylcholine receptor 5 (M5) positive allosteric modulator; causes leftward shift in acetylcholine potency. M5 is thought to regulate cerebral blood flow, and activation of M5 may be therapeutic for Alzheimer′s disease. VU0238429 is the first reported M5-selective small molecule of any kind. It is >30-fold more selective for M5 over M1, M2, M3, and M4. |