title: Tris-azaaromatic quaternary ammonium salts: Novel templates as antagonists at nicotinic receptors mediating nicotine-evoked dopamine release.
abstract: A series of tris-azaaromatic quaternary ammonium salts has been synthesized and evaluated for their ability to inhibit neuronal nicotinic acetylcholine receptors (nAChRs) mediating nicotine-evoked [(3)H]dopamine release from superfused rat striatal slices and for inhibition of [(3)H]nicotine and [(3)H]methyllycaconitine binding to whole rat brain membranes. The 3-picolinium compound 1,3,5-tri-{5-[1-(3-picolinium)]-pent-1-ynyl}benzene tribromide (tPy3PiB), 3b, exhibited high potency and selectivity for nAChR subtypes mediating nicotine-evoked [(3)H]dopamine release with an IC(50) of 0.2 nM and I(max) of 67%.
authors.affiliation: Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536-0082, USA.
authors.forename: Guangrong
authors.initials: G
authors.lastname: Zheng
authors.forename: Sangeetha P
authors.initials: SP
authors.lastname: Sumithran
authors.forename: Agripina G
authors.initials: AG
authors.lastname: Deaciuc
authors.forename: Linda P
authors.initials: LP
authors.lastname: Dwoskin
authors.forename: Peter A
authors.initials: PA
authors.lastname: Crooks
mesh_terms: D000818:Animals; D001372:Aza Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D004298:Dopamine / Q000378:metabolism; D015394:Molecular Structure; D009538:Nicotine / Q000378:metabolism*; D018733:Nicotinic Antagonists / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D051381:Rats; D011978:Receptors, Nicotinic / Q000378:metabolism*; D012492:Salts / Q000737:chemistry; D013329:Structure-Activity Relationship; D014325:Tromethamine / Q000737:chemistry
chemical_list: D001372:Aza Compounds; D018733:Nicotinic Antagonists; D000644:Quaternary Ammonium Compounds; D011978:Receptors, Nicotinic; D012492:Salts; D014325:Tromethamine; D009538:Nicotine; D004298:Dopamine