title: Selective delta-opioid receptor ligands: potential PET ligands based on naltrindole.
abstract: Two series of delta-selective ligands related to the prototypic delta-antagonist naltrindole have been prepared and evaluated in opioid binding assays with the aim of developing new PET ligands for the delta-opioid receptor. One compound (5d) had significantly higher selectivity than naltrindole, but with substantially reduced binding affinity. For those compounds retaining similar affinity to naltrindole, those having ethyl and fluoroethyl substituents afforded the highest levels of selectivity. However, none of the compounds combined the high level of affinity and selectivity ideally suited to the development of an imaging agent.
authors: School of Chemistry, University of Bristol, UK.
authors: J
authors: J
authors: Clayson
authors: A
authors: A
authors: Jales
authors: R J
authors: RJ
authors: Tyacke
authors: A L
authors: AL
authors: Hudson
authors: D J
authors: DJ
authors: Nutt
authors: J W
authors: JW
authors: Lewis
authors: S M
authors: SM
authors: Husbands
mesh_terms: D003952:Diagnostic Imaging / Q000379:methods; D008024:Ligands; D009271:Naltrexone / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000494:pharmacology*; D009292:Narcotic Antagonists / Q000737:chemistry* / Q000494:pharmacology*; D011485:Protein Binding; D017465:Receptors, Opioid, delta / Q000037:antagonists & inhibitors*; D013329:Structure-Activity Relationship; D014055:Tomography, Emission-Computed / Q000379:methods
chemical_list: D008024:Ligands; D009292:Narcotic Antagonists; D017465:Receptors, Opioid, delta; D009271:Naltrexone; C055382:naltrindole