title: Analogs of a potent maxi-K potassium channel opener with an improved inhibitory profile toward cytochrome P450 isozymes.
abstract: Quinolinone 1 is a potent maxi-K potassium channel opener. In an effort to design analogs of 1 with a better inhibitory profile toward the CYP2C9 isozyme, the two acidic sites were chemically modified independently to generate a number of analogs. These analogs were evaluated as maxi-K channel openers in vitro using Xenopus laevis oocytes expressing cloned hSlo maxi-K channels. Compounds 15, 17, and 19 showed potent activity as maxi-K channel openers and were further evaluated for inhibition of the activity of the CYP2C9 isozyme. Compounds 17 and 19 showed diminished inhibitory potency against 2C9 and also against a panel of other more common CYP isozymes.
authors.affiliation: Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492, USA. vivekananda.vrudhula@bms.com
authors.forename: Vivekananda M
authors.initials: VM
authors.lastname: Vrudhula
authors.forename: Bireshwar
authors.initials: B
authors.lastname: Dasgupta
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Boissard
authors.forename: Valentin K
authors.initials: VK
authors.lastname: Gribkoff
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Santone
authors.forename: Richard A
authors.initials: RA
authors.lastname: Dalterio
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Lodge
authors.forename: John E
authors.initials: JE
authors.lastname: Starrett
mesh_terms: D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000037:antagonists & inhibitors*; D001665:Binding Sites; D065729:Cytochrome P-450 CYP2C9; D065607:Cytochrome P-450 Enzyme Inhibitors; D006801:Humans; D020128:Inhibitory Concentration 50; D007527:Isoenzymes / Q000037:antagonists & inhibitors; D009865:Oocytes; D015363:Quinolones / Q000138:chemical synthesis* / Q000494:pharmacology; D013329:Structure-Activity Relationship; D014982:Xenopus laevis
chemical_list: D065607:Cytochrome P-450 Enzyme Inhibitors; D007527:Isoenzymes; D015363:Quinolones; C450260:CYP2C9 protein, human; D065729:Cytochrome P-450 CYP2C9; D001189:Aryl Hydrocarbon Hydroxylases