title: Nociceptin inhibits acquisition of amphetamine-induced place preference and sensitization to stereotypy in rats.
abstract: Nociceptin (also called orphanin FQ), a 17-amino-acid peptide, is the natural ligand of the nociceptin opioid peptide (NOP) receptor. This peptide shows similarities, in its structure, to opioid peptides, mainly to dynorphin A. However, unlike opioid peptides, it does not produce a conditioned place preference or aversion but inhibits rewarding effect of drugs of abuse. The present study was designed to examine the ability of nociceptin to block the acquisition of amphetamine-induced place preference, and the development of amphetamine-induced sensitization to stereotypy in rats. Our experiments indicated that repeated administration of nociceptin at increasing doses during conditioning significantly attenuated the reinforcing effect of amphetamine in conditioned place preference paradigm. Nociceptin did not change the acute effect of amphetamine-induced stereotypy but prevented the development of sensitization to stereotypy measured on the challenge day. Our results suggest the involvement of nociceptin in long-lasting neuronal adaptation after repeated amphetamine treatment.
authors.affiliation: Department of Pharmacodynamics, Medical Academy, PL-20-081 Lublin, Poland. Jolka@panaceum.am.lublin.pl
authors.forename: Jolanta
authors.initials: J
authors.lastname: Kotlinska
authors.forename: Piotr
authors.initials: P
authors.lastname: Rafalski
authors.forename: Grazyna
authors.initials: G
authors.lastname: Biala
authors.forename: Tomasz
authors.initials: T
authors.lastname: Dylag
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Rolka
authors.forename: Jerzy
authors.initials: J
authors.lastname: Silberring
mesh_terms: D000661:Amphetamine / Q000037:antagonists & inhibitors* / Q000494:pharmacology*; D000818:Animals; D003213:Conditioning, Psychological / Q000187:drug effects* / Q000502:physiology; D008297:Male; D018847:Opioid Peptides / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D013239:Stereotyped Behavior / Q000187:drug effects* / Q000502:physiology; D000097629:Nociceptin
chemical_list: D000661:Amphetamine; D018847:Opioid Peptides; D000097629:Nociceptin