Cited by 92Neurotransmitter Receptor Influence on BehaviorSubstance Abuse Treatment and OutcomesNeural and Behavioral Psychology Studies

The role of dopamine in alcohol self-administration in humans: individual differences

Barrett, Sean P., Pihl, Robert O., Benkelfat, Chawki, Brunelle, Caroline, Young, Simon N., Leyton, Marco·2008·European Neuropsychopharmacology

Abstract

Objective To clarify dopamine's role in alcohol self-administration in a heterogeneous sample of drinkers using acute phenylalanine/tyrosine depletion (APTD).Methods Sixteen men with variable drinking histories were characterized on their ethanol-induced cardiac response, a marker previously proposed to index dopamine system reactivity and vulnerability to alcohol abuse. During separate sessions participants were administered (i) a nutritionally balanced (BAL) amino acid (AA) mixture, (ii) a mixture lacking the dopamine precursors, phenylalanine and tyrosine, and (iii) APTD followed by the dopamine precursor, L-DOPA. Five hours after AA administration, participants could earn units of alcohol using a progressive ratio breakpoint task.Results Alcohol self-administration was reduced in the APTD and APTD+L-DOPA conditions relative to the BAL condition. In both cases the changes were predicted by ethanol-induced cardiac change.Conclusions The motivation to drink is likely regulated by more than one neurobiological mechanism. Individual differences in cardiac responsivity to ethanol might provide a peripheral marker of responsiveness to pharmacological manipulations of dopamine.

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Crossref · 10.1016/j.euroneuro.2008.01.008

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Authors
Barrett, S. P., Pihl, R. O., Benkelfat, C., Brunelle, C., Young, S. N., & Leyton, M.
Affiliations
McGill University (CA)
Corresponding author
Leyton, Marco
Venue
European Neuropsychopharmacology
Publisher
Elsevier BV
Published
2008-06
Volume
18
Issue
6
Pages
439-447
ISSN
0924-977X (ISSN-L)
OpenAlex
W2040500877
Cited by
92
References
97
Citations by year
2026: 1 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 45 · 2018: 3 · 2017: 2 · 2016: 5 · 2015: 6 · 2014: 4 · 2013: 6 · 2012: 5
FWCI
1.15
Type
journal article
Language
en
Open access
closed
Locations
  • European Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
McGill University Health Centre
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
dopamine, alcohol self-administration, L-DOPA, individual differences, dopamine precursor
MeSH terms
Adult, Alcohol Drinking, Ethanol, Amino Acids, Analysis of Variance, Dopamine, Double-Blind Method, Heart Rate, Humans, Individuality, Levodopa, Male, Phenylalanine, Self Administration, Tyrosine, Dopamine Agents

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