title: On the opioid nature of phencyclidine and its 3-hydroxy derivative.
abstract: Phencyclidine (PCP) and its 3-hydroxy derivative (PCP-3-OH) caused a dose-dependent, naloxone reversible inhibition of the response of the guinea pig ileum to electrical stimulation. Unlike PCP, PCP-3-OH exerted an opioid antagonistic effect in the mouse vas deferens bioassay. Whereas both compounds displayed a high affinity in displacing [3H]SKF-10047 binding to rat brain membranes, PCP-3-OH displayed a high affinity to [3H]morphine receptors also. The mediation of alpha- and mu-receptors in the opioid effects of these drugs is discussed.
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D008297:Male; D051379:Mice; D010622:Phencyclidine / Q000031:analogs & derivatives* / Q000378:metabolism / Q000494:pharmacology*; D011869:Radioligand Assay; D011957:Receptors, Opioid / Q000187:drug effects* / Q000378:metabolism; D014649:Vas Deferens / Q000187:drug effects
chemical_list: D011957:Receptors, Opioid; C033114:3-hydroxyphencyclidine; D010622:Phencyclidine