Cited by 103Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchNeuropeptides and Animal Physiology

Morphine-conditioned single-trial place preference: role of nucleus accumbens shell dopamine receptors in acquisition, but not expression

Fenu, Sandro, Spina, Liliana, Rivas, Emilia, Longoni, Rosanna, Di Chiara, Gaetano·2006·Psychopharmacology

Abstract

Rationale A large body of evidence indicates an involvement of the mesolimbic dopamine (DA) pathway innervating the ventral striatum in the motivational effects of drug abuse.Objective The goal of the study is to clarify the role of DA D1 and D2 receptors of the rat nucleus accumbens (NAc) shell and core in the motivational effects of morphine as studied by conditioned place preference (CPP).Methods The effect of the intracerebral infusion of DA antagonists specific for DA D1 (SCH 39166) and D2 receptors (L-sulpiride) was studied in a single-trial place conditioning paradigm with fixed assignment of the drug to the unpreferred compartment.Results Morphine induced significant CPP at all the doses tested (0.5, 1.0, and 2.0 mg/kg, subcutaneously). A dose of 1.0 mg/kg was selected for further studies. Intra-NAc shell infusion of SCH 39166 and L-sulpiride at doses of 25 and 50 ng/1 microl per side impaired the acquisition of CPP by morphine. No effect was observed at 12.5 ng/1 microl per side. Intra-NAc core infusion of SCH 39166 (12.5, 25, and 50 ng/1 microl per side) did not affect the acquisition of morphine-induced CPP, while L-sulpiride (12.5, 25, and 50 ng/1 microl per side) impaired CPP acquisition only at the dose of 50 ng/1 microl per side. No effect on morphine-induced CPP was observed when the DA antagonists were infused into the NAc shell or core 10 min before the test session.Conclusion These results indicate that DA D1 and D2 receptors in the NAc shell are involved in the acquisition of morphine-induced CPP.

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Crossref · 10.1007/s00213-006-0415-2

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Authors
Fenu, S., Spina, L., Rivas, E., Longoni, R., & Di Chiara, G.
Affiliations
University of Cagliari (IT)
Venue
Psychopharmacology
Published
2006-05-25
Volume
187
Issue
2
Pages
143-153
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2011492524
Cited by
103
References
64
Citations by year
2026: 3 · 2025: 5 · 2024: 2 · 2022: 5 · 2021: 2 · 2020: 6 · 2019: 1 · 2018: 7 · 2017: 6 · 2016: 5 · 2015: 1 · 2014: 5 · 2013: 7 · 2012: 5
FWCI
3.80
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • UNICA IRIS Institutional Research Information System (University of Cagliari) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
morphine, conditioned place preference, nucleus accumbens shell, nucleus accumbens core, dopamine D1 receptor, dopamine D2 receptor, dopamine antagonists, SCH 39166, mesolimbic dopamine system
MeSH terms
Animals, Association Learning, Benzazepines, Brain Mapping, Choice Behavior, Conditioning, Classical, Dose-Response Relationship, Drug, Male, Morphine, Narcotics, Nucleus Accumbens, Social Environment, Sulpiride, Rats, Sprague-Dawley, Receptors, Dopamine D1, Receptors, Dopamine D2, Rats, Dopamine D2 Receptor Antagonists

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