title: Mixed kappa/mu opioid receptor agonists: the 6 beta-naltrexamines.
abstract: Ligands from the naltrexamine series have consistently demonstrated agonist activity at kappa opioid receptors (KOR), with varying activity at the mu opioid receptor (MOR). Various 6 beta-cinnamoylamino derivatives were made with the aim of generating ligands with a KOR agonist/MOR partial agonist profile, as ligands with this activity may be of interest as treatment agents for cocaine abuse. The ligands all displayed the desired high affinity, nonselective binding in vitro and in the functional assays were high efficacy KOR agonists with some partial agonist activity at MOR. Two of the new ligands (12a, 12b) have been evaluated in vivo, with 12a acting as a KOR agonist and therefore somewhat similar to the previously evaluated analogues 3-6, while 12b displayed predominant MOR agonist activity.
authors.affiliation: Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom.
authors.forename: Gerta
authors.initials: G
authors.lastname: Cami-Kobeci
authors.forename: Adrian P
authors.initials: AP
authors.lastname: Neal
authors.forename: Faye A
authors.initials: FA
authors.lastname: Bradbury
authors.forename: Lauren C
authors.initials: LC
authors.lastname: Purington
authors.forename: Mario D
authors.initials: MD
authors.lastname: Aceto
authors.forename: Louis S
authors.initials: LS
authors.lastname: Harris
authors.forename: John W
authors.initials: JW
authors.lastname: Lewis
authors.forename: John R
authors.initials: JR
authors.lastname: Traynor
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Husbands
mesh_terms: D000818:Animals; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D009271:Naltrexone / Q000031:analogs & derivatives* / Q000494:pharmacology; D051381:Rats; D017473:Receptors, Opioid, kappa / Q000819:agonists*; D017450:Receptors, Opioid, mu / Q000819:agonists*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D017473:Receptors, Opioid, kappa; D017450:Receptors, Opioid, mu; D009271:Naltrexone; C035438:beta-naltrexamine