nAChR agonist 1 is a potent, brain-permeable, and orally efficacious positive allosteric modulator of α7 nicotinic acetylcholine receptor (α7 nAChR). nAChR agonist 1 has the EC50 of 0.32 µM in a Ca2+ mobilization assay (PNU-282987-induced, FLIPR based) in human IMR-32 neuroblastoma cells that endogenously express α7 nAChR. nAChR agonist 1 can be develpoped for the treatment of Alzheimer’s disease[1].

Acute (single-dose) oral administration of nAChR agonist 1 (compound 28) prior to memory acquisition, significantly increased the discrimination index in both time-delay and scopolamine-induced 8 amnesia at 1 and 3 mg/kg dose levels in male Wistar rats.nAChR agonist 1 also significantly improved the discrimination index in the memory consolidation paradigm, when administered immediately after the memory acquisition trial[1].nAChR agonist 1 treatment (10 mg/kg; p.o.) shows that the AUC, Cmax, and F values are 63 h μM, 2.3 μM, 63%, respectively[1].nAChR agonist 1 (1 mg/kg; i.v.) treatment shows that the AUC, Cmax,T1/2, CL, and Vss are 1.3 h μM, 0.9 μM, 1.4 hours, 31 mL/min/kg, 3 L/kg, respectively[1].

[1]. Sinha N, et al.Discovery of Novel, Potent, Brain-Permeable, and Orally Efficacious Positive Allosteric Modulator of α7 Nicotinic Acetylcholine Receptor [4-(5-(4-Chlorophenyl)-4-methyl-2-propionylthiophen-3-yl)benzenesulfonamide]: Structure-Activity Relationship and Preclinical Characterization. J Med Chem. 2020 Feb 13;63(3):944-960.