Cited by 1,101Neurotransmitter Receptor Influence on BehaviorSubstance Abuse Treatment and OutcomesNeural and Behavioral Psychology Studies

Dopamine in drug abuse and addiction: results from imaging studies and treatment implications

Volkow, N D, Fowler, J S, Wang, G-J, Swanson, J M·2004·Molecular Psychiatry

Abstract

The involvement of dopamine in drug reinforcement is well recognized but its role in drug addiction is much less clear. Imaging studies have shown that the reinforcing effects of drugs of abuse in humans are contingent upon large and fast increases in dopamine that mimic but exceed in the intensity and duration those induced by dopamine cell firing to environmental events. In addition, imaging studies have also documented a role of dopamine in motivation, which appears to be encoded both by fast as well as smooth DA increases. Since dopamine cells fire in response to salient stimuli, the supraphysiological activation by drugs is likely to be experienced as highly salient (driving attention, arousal conditioned learning and motivation) and may also reset the thresholds required for environmental events to activate dopamine cells. Indeed, imaging studies have shown that in drug-addicted subjects, dopamine function is markedly disrupted (decreases in dopamine release and in dopamine D2 receptors in striatum) and this is associated with reduced activity of the orbitofrontal cortex (neuroanatomical region involved with salience attribution and motivation and implicated in compulsive behaviors) and the cingulate gyrus (neuroanatomical region involved with inhibitory control and attention and implicated in impulsivity). However, when addicted subjects are exposed to drug-related stimuli, these hypoactive regions become hyperactive in proportion to the expressed desire for the drug. We postulate that decreased dopamine function in addicted subjects results in decreased sensitivity to nondrug-related stimuli (including natural reinforcers) and disrupts frontal inhibition, both of which contribute to compulsive drug intake and impaired inhibitory control. These findings suggest new strategies for pharmacological and behavioral treatments, which focus on enhancing DA function and restoring brain circuits disrupted by chronic drug use to help motivate the addicted subject in activities that provide alternative sources of reinforcement, counteract conditioned responses, enhance their ability to control their drive to take drugs and interfere with their compulsive administration.

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Crossref · 10.1038/sj.mp.4001507

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Authors
Volkow, N. D., Fowler, J. S., Wang, G.-J., & Swanson, J. M.
Affiliations
  • National Institute on Drug Abuse (US)
  • Brookhaven National Laboratory (US)
  • University of California, Irvine (US)
Corresponding author
Volkow, N D
Venue
Molecular Psychiatry
Published
2004-04-06
Volume
9
Issue
6
Pages
557-569
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W1980277133
Cited by
1,101
References
131
Citations by year
2026: 22 · 2025: 32 · 2024: 20 · 2023: 37 · 2022: 34 · 2021: 40 · 2020: 87 · 2019: 39 · 2018: 43 · 2017: 39 · 2016: 69 · 2015: 71 · 2014: 78 · 2013: 55 · 2012: 60
FWCI
3.62
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Office of National Drug Control Policy
  • National Institutes of Health (5r01da009490-08)
  • National Institute on Alcohol Abuse and Alcoholism (AA-09481, R01AA009481)
  • National Institute on Drug Abuse (DA-06891, DA-09490, DA-06278, R01DA006278, R01DA006891)
  • Biological and Environmental Research
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, drug addiction, drug reinforcement, motivation, salience, orbitofrontal cortex, cingulate gyrus, dopamine D2 receptor, striatum, impulsivity, inhibitory control, pharmacotherapy, behavior therapy
MeSH terms
Attention Deficit Disorder with Hyperactivity, Brain, Child, Dopamine, Humans, Neurons, Substance-Related Disorders

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