Cited by 651Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesNeuroscience and Neuropharmacology Research

Destruction of dopamine in the nucleus accumbens selectively attenuates cocaine but not heroin self-administration in rats

Pettit, Hugh O., Ettenberg, Aaron, Bloom, Floyd E., Koob, George F.·1984·Psychopharmacology

Abstract

The hypothesis that separate neural systems mediate the reinforcing properties of opioid and psychomotor stimulant drugs was tested by examining the role of mesolimbic dopamine (DA) neurons in maintaining intravenous heroin and cocaine self-administration. After local destruction of the DA terminals in the nucleus accumbens (NAcc) with 6-hydroxydopamine (6-OHDA), rats trained to self-administer cocaine and heroin on alternate days were observed for changes in their drug-seeking behaviors. Postlesion responding for cocaine showed a time-dependent decrease or extinction, whereas heroin self-administration showed a time-dependent recovery. By the fifth trial postlesion, heroin self-administration had recovered to 76% of prelesion baseline levels, but cocaine self-administration had dropped to 30% of prelesion baseline rates. Thus, selective lesions of the DA terminals in the nucleus accumbens significantly attenuate cocaine but not heroin self-administration. These data support the hypothesis that independent neural substrates are responsible for the reinforcing actions of these two drugs.

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Crossref · 10.1007/bf00427441

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Authors
Pettit, H. O., Ettenberg, A., Bloom, F. E., & Koob, G. F.
Affiliations
  • Texas Christian University (US)
  • University of California, Santa Barbara (US)
  • Scripps Clinic (US)
Venue
Psychopharmacology
Published
1984-10
Volume
84
Issue
2
Pages
167-173
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W1964909230
Cited by
651
References
37
Citations by year
2026: 5 · 2025: 7 · 2024: 7 · 2023: 9 · 2022: 15 · 2021: 6 · 2020: 13 · 2019: 16 · 2018: 10 · 2017: 9 · 2016: 11 · 2015: 13 · 2014: 15 · 2013: 15 · 2012: 17
FWCI
5.74
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
nucleus accumbens, dopamine, cocaine self-administration, heroin self-administration, 6-hydroxydopamine lesion, drug reinforcement, opioid reinforcement, drug-seeking behavior
MeSH terms
Animals, Cocaine, Heroin, Dopamine, Hydroxydopamines, Male, Norepinephrine, Nucleus Accumbens, Rats, Inbred Strains, Self Administration, Septal Nuclei, 3,4-Dihydroxyphenylacetic Acid, Oxidopamine, Rats

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