Cited by 493Neurotransmitter Receptor Influence on BehaviorCircadian rhythm and melatoninNeuroscience and Neuropharmacology Research

Regulation of dopaminergic transmission and cocaine reward by the Clock gene

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McClung, Colleen A., Sidiropoulou, Kyriaki, Vitaterna, Martha, Takahashi, Joseph S., White, Francis J., Cooper, Donald C., Nestler, Eric J.·2005·Proceedings of the National Academy of Sciences

Abstract

Although there are clear interactions between circadian rhythms and drug addiction, mechanisms for such interactions remain unknown. Here we establish a role for the Clock gene in regulating the brain's reward circuit. Mice lacking a functional Clock gene display an increase in cocaine reward and in the excitability of dopamine neurons in the midbrain ventral tegmental area, a key brain reward region. These phenotypes are associated with increased expression and phosphorylation of tyrosine hydroxylase (the rate-limiting enzyme in dopamine synthesis), as well as changes in several genes known to regulate dopamine activity in the ventral tegmental area. These findings demonstrate the involvement of a circadian-associated gene, Clock , in regulating dopamine function and cocaine reward.

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Crossref · 10.1073/pnas.0503584102

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37 of 37 references verified0 citation errors · 0 not checkable

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  • Circadian genes in brain regions outside the SCN contribute locally to the control of neuronal metabolism, neurotransmitter synthesis and activity, and disruption of these functions might contribute to brain disorders.

    “circadian genes in other brain regions outside of this central pace-maker also contribute locally to the control of neuronal metabolism, neurotransmitter synthesis and activity, and the disruption of these functions might contribute to brain disorders264,304–315”
  • Clock mutants display increased dopaminergic cell firing and bursting in the VTA.

    “it was verified that Clock mutants display increased dopaminergic cell firing and bursting in the VTA (McClung et al., 2005).”
  • The manic-like profile of Clock mutant mice includes hyperactivity, lowered depression-like behavior, greater risk taking behavior, an increase in the preference for sucrose and cocaine, and an increase in goal-directed behavior resulting in intracranial self-stimulation.

    “This includes hyperactivity, lowered depression-like behavior, greater risk taking behavior, an increase in the preference for sucrose and cocaine, and an increase in goal-directed behavior resulting in intracranial self-stimulation.”
  • Mice with a mutation in the Clock gene have a behavioral profile that is strikingly similar to human mania.

    “Mice with a mutation in the Clock gene have a behavioral profile that is strikingly similar to human mania (McClung et al., 2005; Roybal et al., 2007).”
  • A microarray analysis identified a number of potential target genes of CLOCK in the VTA which are important regulators of dopaminergic activity.

    “a microarray analysis identified a number of potential target genes of CLOCK in the VTA which are important regulators of dopaminergic activity (McClung et al., 2005).”

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Authors
McClung, C. A., Sidiropoulou, K., Vitaterna, M., Takahashi, J. S., White, F. J., Cooper, D. C., & Nestler, E. J.
Affiliations
Northwestern University (US)
Venue
Proceedings of the National Academy of Sciences
Published
2005-06-20
Volume
102
Issue
26
Pages
9377-9381
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1998352623
Cited by
493
References
37
Citations by year
2026: 15 · 2025: 10 · 2024: 17 · 2023: 17 · 2022: 24 · 2021: 28 · 2020: 19 · 2019: 21 · 2018: 30 · 2017: 25 · 2016: 24 · 2015: 23 · 2014: 32 · 2013: 25 · 2012: 27
FWCI
9.16
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute of Mental Health
  • National Institute on Drug Abuse (K01DA017750)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
clock genes, circadian rhythm, cocaine reward, dopaminergic neurons, ventral tegmental area, tyrosine hydroxylase, dopamine synthesis, drug addiction, knockout mice
MeSH terms
Animals, Brain, Circadian Rhythm, Cocaine, Dopamine, Dose-Response Relationship, Drug, Electrophysiology, Homozygote, Immunohistochemistry, Male, Mice, Transgenic, Models, Neurological, Mutation, Neurons, Phenotype, Phosphorylation, Reward, Time Factors, Tyrosine 3-Monooxygenase, Blotting, Western, Trans-Activators, Point Mutation, Ventral Tegmental Area, Substance-Related Disorders, Oligonucleotide Array Sequence Analysis, Mice, CLOCK Proteins

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