Cited by 26Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchSubstance Abuse Treatment and Outcomes

Dopamine release in the nucleus accumbens (shell) of two lines of rats selectively bred to prefer or avoid ethanol

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Quintanilla, María Elena, Bustamante, Diego, Tampier, Lutske, Israel, Yedy, Herrera-Marschitz, Mario·2007·European Journal of Pharmacology

Abstract

Lower tissue levels of dopamine and 5-hydroxytryptamine (5-HT) have been found in the nucleus accumbens of alcohol-naïve rats selectively bred to prefer ethanol than in rats bred to avoid it. These findings have led to the hypothesis that differences in the dopamine and 5-HT tone may be linked to ethanol preference. In the present study we used the in vivo microdialysis technique to determine the actual extracellular levels of dopamine, its metabolites 3,4-dihydroxyphenyl acetaldehyde (DOPALD), 3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA) and 5-HT and 5-hydroxyindolacetic acid (5-HIAA) in the shell of nucleus accumbens of rat lines selectively bred as either high-ethanol (UChB) or low-ethanol (UChA) drinkers. Basal extracellular levels of dopamine, DOPALD, DOPAC and HVA were lower in the shell of nucleus accumbens of ethanol-naïve UChB than in UChA rats. In agreement, when perfused with 100 microM d-amphetamine or 100 mM KCl lower dopamine increases were observed in nucleus accumbens of UChB rats compared to UChA rats, indicating lower cytosolic (d-amphetamine releasable) and vesicular (KCl releasable) dopamine pools in UChB animals. Since the experiments were performed in ethanol-naïve rats, the present results suggest an innate deficiency in the mesolimbic dopamine system of UChB rats. There were no line differences in basal, d-amphetamine or KCl stimulated 5-HT levels. Thus, the present findings support a role of dopamine, but not of 5-HT, as predictor of ethanol preference in UChB rats. Overall, data obtained are in agreement with previous reports in other rat lines showing that lower dopamine levels and its metabolites are associated with a genetic predisposition to ethanol preference.

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Crossref · 10.1016/j.ejphar.2007.06.038

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  • Alcohol-naïve mice or rats selectively bred to prefer ethanol display decreased basal dopamine levels in the nucleus accumbens, and alcohol preference in these animals is reversed by direct dopamine receptor activation.

    “Indeed, alcohol-naïve mice (George et al., 1995) or rats (Gongwer et al., 1989; Quintanilla et al., 2007) selectively bred to prefer ethanol display decreased basal dopamine levels in the nucleus accumbens, and alcohol preference in these animals is reversed by direct dopamine receptor activation (George et al., 1995).”

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Cited by

Authors
Quintanilla, M. E., Bustamante, D., Tampier, L., Israel, Y., & Herrera-Marschitz, M.
Affiliations
Thomas Jefferson University (US)
Venue
European Journal of Pharmacology
Publisher
Elsevier BV
Published
2007-11
Volume
573
Issue
1-3
Pages
84-92
ISSN
0014-2999 (ISSN-L)
OpenAlex
W2038908006
Cited by
26
References
69
Citations by year
2026: 2 · 2025: 2 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 1 · 2014: 4 · 2013: 3 · 2012: 1
FWCI
0.66
Type
journal article
Language
en
Open access
Locations
  • European Journal of Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • Universidad de Chile (submittedVersion, cc-by-nc-nd)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
Keywords
dopamine release, nucleus accumbens shell, ethanol preference, mesolimbic dopamine system, dopamine metabolites, DOPAC, homovanillic acid, serotonin, d-amphetamine, potassium chloride, genetic predisposition to alcoholism, extracellular dopamine
MeSH terms
Alcohol Drinking, Alcoholism, Anesthesia, Inhalation, Animals, Breeding, Chromatography, High Pressure Liquid, Dextroamphetamine, Dopamine, Female, Homovanillic Acid, Hydroxyindoleacetic Acid, Isoflurane, Male, Nucleus Accumbens, Potassium Chloride, Rats, Inbred Strains, Serotonin, Stereotaxic Techniques, 3,4-Dihydroxyphenylacetic Acid, Microdialysis, Genetic Predisposition to Disease, Rats

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