Zanapezil (TAK-147) is a powerful and selective inhibitor of acetylcholine esterase (AChE). It demonstrates significant and reversible inhibition of AChE activity in rat cerebral cortex homogenates (IC50 = 51.2 nM). Furthermore, Zanapezil exhibits moderate inhibition of muscarinic M1 and M2 receptor binding with Ki values of 234 and 340 nM, respectively. This compound holds promise for the investigation of the initial stages of Alzheimer's disease (AD).
AZD1446 HCl, also known as TC-6683, is a novel highly selective α4β2 nicotinic acetylcholine receptor agonist for the treatment of cognitive disorders. AZD1446 HCl showed favorable pharmaceutical properties and in vivo efficacy in animal models has been identified as a potential treatment for cognitive deficits associated with psychiatric or neurological conditions and had been evaluated in phase 2 clinical trials as a treatment for Alzheimer's disease.
JTP-4819 is a potent and selective prolyl endopeptidase (PEP) inhibitor with potential for treating Alzheimer's disease. At nanomolar concentration, JTP-4819 inhibited the degradation of substance P, arginine-vasopressin, and thyrotropin-releasing hormone by PEP in supernatants of the rat cerebral cortex and hippocampus. Repeated administration of JTP-4819 reversed the aging-induced decrease in brain substance P-like and thyrotropin-releasing hormone-like immunoreactivity, suggesting that this drug may be able to improve the imbalance of peptidergic neuronal systems that develops with senescense by inhibiting PEP activity. JTP-4819 increased acetylcholine release from the frontal cortex and hippocampus, regions closely associated with memory, in both young and aged rats.
AZD1446 tosylate, also known as TC-6683, is a novel highly selective α4β2 nicotinic acetylcholine receptor agonist for the treatment of cognitive disorders. AZD1446 tosylate showed favorable pharmaceutical properties and in vivo efficacy in animal models has been identified as a potential treatment for cognitive deficits associated with psychiatric or neurological conditions and had been evaluated in phase 2 clinical trials as a treatment for Alzheimer's disease.