title: Characterisation of the delta-opioid receptor on the hamster vas deferens.
abstract: It has recently been reported that the hamster vas deferens contains only delta-opioid receptors. We have demonstrated that three delta-receptor agonists [D-Ala2, D-Leu5]enkephalin (DADLE), [D-Pen2, D-Pen5]enkephalin (DPDPE) and [D-Thr2, Leu5, Thr6] enkephalin (DTLET) appear to mediate their effects via the delta-receptor since they are readily reversed by the selective delta-receptor antagonist ICI 174864. In addition, a number of classical mu and k receptor compounds were devoid of activity in this preparation. However it was observed that some compounds such as etorphine and MR 2034 reported to possess delta-receptor affinity in other assay systems were weak or inactive on the hamster vas deferens.
mesh_terms: D000818:Animals; D006224:Cricetinae; D004743:Enkephalin, Leucine / Q000031:analogs & derivatives / Q000494:pharmacology; D016308:Enkephalin, Leucine-2-Alanine; D066298:In Vitro Techniques; D008297:Male; D008647:Mesocricetus; D009130:Muscle, Smooth / Q000032:analysis*; D009270:Naloxone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology; D009842:Oligopeptides / Q000494:pharmacology; D011957:Receptors, Opioid / Q000032:analysis*; D017465:Receptors, Opioid, delta; D014649:Vas Deferens / Q000032:analysis
chemical_list: D009292:Narcotic Antagonists; D009294:Narcotics; D009842:Oligopeptides; D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D009270:Naloxone; D004743:Enkephalin, Leucine; D016308:Enkephalin, Leucine-2-Alanine; C037653:deltakephalin; C040643:N,N-diallyl-tyrosyl-alpha-aminoisobutyric acid-phenylalanyl-leucine