Cited by 959Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesSubstance Abuse Treatment and Outcomes

Addiction: Beyond dopamine reward circuitry

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Volkow, Nora D., Wang, Gene-Jack, Fowler, Joanna S., Tomasi, Dardo, Telang, Frank·2011·Proceedings of the National Academy of Sciences

Abstract

Dopamine (DA) is considered crucial for the rewarding effects of drugs of abuse, but its role in addiction is much less clear. This review focuses on studies that used PET to characterize the brain DA system in addicted subjects. These studies have corroborated in humans the relevance of drug-induced fast DA increases in striatum [including nucleus accumbens (NAc)] in their rewarding effects but have unexpectedly shown that in addicted subjects, drug-induced DA increases (as well as their subjective reinforcing effects) are markedly blunted compared with controls. In contrast, addicted subjects show significant DA increases in striatum in response to drug-conditioned cues that are associated with self-reports of drug craving and appear to be of a greater magnitude than the DA responses to the drug. We postulate that the discrepancy between the expectation for the drug effects (conditioned responses) and the blunted pharmacological effects maintains drug taking in an attempt to achieve the expected reward. Also, whether tested during early or protracted withdrawal, addicted subjects show lower levels of D2 receptors in striatum (including NAc), which are associated with decreases in baseline activity in frontal brain regions implicated in salience attribution (orbitofrontal cortex) and inhibitory control (anterior cingulate gyrus), whose disruption results in compulsivity and impulsivity. These results point to an imbalance between dopaminergic circuits that underlie reward and conditioning and those that underlie executive function (emotional control and decision making), which we postulate contributes to the compulsive drug use and loss of control in addiction.

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  • Variants of PER2 are associated with D2 receptor availability and cocaine addiction vulnerability, risky alcohol drinking under high psychosocial stress, and disrupted sleep.

    “Variants of PER2 are associated with D2 receptor availability and cocaine addiction vulnerability (133,134); risky alcohol drinking under high psychosocial stress (135); and disrupted sleep (136).”

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Authors
Volkow, N. D., Wang, G.-J., Fowler, J. S., Tomasi, D., & Telang, F.
Affiliations
  • National Institutes of Health (US)
  • Brookhaven National Laboratory (US)
Venue
Proceedings of the National Academy of Sciences
Published
2011-03-14
Volume
108
Issue
37
Pages
15037-15042
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2020065445
Cited by
959
References
43
Citations by year
2026: 63 · 2025: 78 · 2024: 51 · 2023: 53 · 2022: 56 · 2021: 87 · 2020: 58 · 2019: 45 · 2018: 60 · 2017: 69 · 2016: 75 · 2015: 78 · 2014: 75 · 2013: 50 · 2012: 47
FWCI
5.64
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (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
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
Keywords
addiction, dopamine, drug reward, nucleus accumbens, striatum, drug craving, dopamine D2 receptor, dopamine receptor binding, withdrawal, orbitofrontal cortex, anterior cingulate cortex, executive function, impulsivity, compulsive drug use
MeSH terms
Animals, Conditioning, Psychological, Dopamine, Humans, Models, Biological, Nerve Net, Reward, Behavior, Addictive

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