Cited by 79Neurotransmitter Receptor Influence on BehaviorCircadian rhythm and melatoninGenetic Associations and Epidemiology

Repeat variation in the human PER2 gene as a new genetic marker associated with cocaine addiction and brain dopamine D2 receptor availability

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Shumay, E, Fowler, J S, Wang, G-J, Logan, J, Alia-Klein, N, Goldstein, R Z, Maloney, T, Wong, C +1 more·2012·Translational Psychiatry

Abstract

Low dopamine D2 receptor (D2R) levels in the striatum are consistently reported in cocaine abusers; inter-individual variations in the degree of the decrease suggest a modulating effect of genetic makeup on vulnerability to addiction. The PER2 (Period 2) gene belongs to the clock genes family of circadian regulators; circadian oscillations of PER2 expression in the striatum was modulated by dopamine through D2Rs. Aberrant periodicity of PER2 contributes to the incidence and severity of various brain disorders, including drug addiction. Here we report a newly identified variable number tandem repeat (VNTR) polymorphism in the human PER2 gene (VNTR in the third intron). We found significant differences in the VNTR alleles prevalence across ethnic groups so that the major allele (4 repeats (4R)) is over-represented in non-African population (4R homozygosity is 88%), but not in African Americans (homozygosity 51%). We also detected a biased PER2 genotype distribution among healthy controls and cocaine-addicted individuals. In African Americans, the proportion of 4R/three repeat (3R) carriers in healthy controls is much lower than that in cocaine abusers (23% vs 39%, P=0.004), whereas among non-Africans most 3R/4R heterozygotes are healthy controls (10.5% vs 2.5%, P=0.04). Analysis of striatal D2R availability measured with positron emission tomography and [(11)C]raclopride revealed higher levels of D2R in carriers of 4R/4R genotype (P<0.01). Taken together, these results provide preliminary evidence for the role of the PER2 gene in regulating striatal D2R availability in the human brain and in vulnerability for cocaine 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
Shumay, E., Fowler, J. S., Wang, G.-J., Logan, J., Alia-Klein, N., Goldstein, R. Z., Maloney, T., Wong, C., & Volkow, N. D.
Affiliations
  • Brookhaven National Laboratory (US)
  • National Institute on Drug Abuse (US)
Corresponding author
Shumay, E
Venue
Translational Psychiatry
Published
2012-03-06
Volume
2
Issue
3
Pages
e86-e86
ISSN
2158-3188 (ISSN-L)
OpenAlex
W1966341378
Cited by
79
References
61
Citations by year
2026: 2 · 2025: 2 · 2024: 6 · 2023: 6 · 2022: 7 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 6 · 2017: 8 · 2016: 8 · 2015: 8 · 2014: 6 · 2013: 5
FWCI
2.50
Type
journal article
Language
en
Open access
Locations
  • Translational Psychiatry (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion, cc-by-nc-nd)
Funders
National Institute on Drug Abuse (KO1 DA025280, R01DA023579, K01DA025280)
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 › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
cocaine dependence, variable number tandem repeat polymorphism, clock genes, striatum, genetic susceptibility to addiction, African Americans, ethnic differences in allele frequency, [11C]raclopride PET
MeSH terms
Adult, Alleles, Asian, Black or African American, Corpus Striatum, Female, Gene Frequency, Genetic Markers, Genetics, Population, Genotype, Genetic Carrier Screening, Hispanic or Latino, Homozygote, Humans, Male, Polymorphism, Genetic, Genetic Variation, Receptors, Dopamine D2, Minisatellite Repeats, Cocaine-Related Disorders, Genetic Predisposition to Disease, Computers, Molecular, White People, Positron-Emission Tomography, Period Circadian Proteins

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