Cited by 53Neurotransmitter Receptor Influence on BehaviorParkinson's Disease Mechanisms and TreatmentsSubstance Abuse Treatment and Outcomes

In vivo evidence for low striatal vesicular monoamine transporter 2 (VMAT2) availability in cocaine abusers

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Narendran, Rajesh, Lopresti, Brian J., Martinez, Diana, Mason, Neale Scott, Himes, Michael, May, Maureen A., Daley, Dennis C., Price, Julie C. +2 more·2012·American Journal of Psychiatry

Abstract

OBJECTIVE: Positron emission tomography (PET) imaging studies in cocaine abusers have shown that low dopamine release in the striatum following an amphetamine challenge is associated with higher relapse rates. One possible mechanism that might lead to lower amphetamine-induced dopamine release is low availability of dopamine storage vesicles in the presynaptic terminals for release. Consistent with this hypothesis, postmortem studies have shown low levels of vesicular monoamine transporter, type 2 (VMAT2), the membrane protein that regulates the size of the vesicular dopamine pool, in cocaine abusers relative to healthy subjects. To confirm the postmortem findings, the authors used PET and the VMAT2 radioligand [¹¹C]-(+)-dihydrotetrabenazine (DTBZ) to assess the in vivo VMAT2 availability in a group of 12 recently abstinent cocaine-dependent subjects and matched healthy comparison subjects. METHOD: [¹¹C]DTBZ nondisplaceable binding potential (BP(ND)) was measured by kinetic analysis using the arterial input function or, if arterial input was unavailable, by the simplified reference tissue method. RESULTS: [¹¹C]DTBZ BP(ND) was significantly lower in the cocaine abusers than in the comparison subjects in the limbic striatum (10.0% lower), associative striatum (-13.4%), and sensorimotor striatum (-11.5%). CONCLUSIONS: The results of this in vivo PET study confirm previous in vitro reports of low VMAT2 availability in the striatum of cocaine abusers. It also suggests a compensatory down-regulation of the dopamine storage vesicles in response to chronic cocaine abuse and/or a loss of dopaminergic terminals. Further research is necessary to understand the clinical relevance of this observation to relapse and outcome in abstinent cocaine abusers.

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Authors
Narendran, R., Lopresti, B. J., Martinez, D., Mason, N. S., Himes, M., May, M. A., Daley, D. C., Price, J. C., Mathis, C. A., & Frankle, W. G.
Affiliations
  • University of Pittsburgh (US)
  • From the Departments of Radiology and Psychiatry, University of Pittsburgh; and the Department of Psychiatry, Columbia University Medical Center, New York.
Venue
American Journal of Psychiatry
Published
2012-01
Volume
169
Issue
1
Pages
55-63
ISSN
  • 0002-953X (ISSN-L)
  • 1535-7228
OpenAlex
W2112032964
Cited by
53
References
38
Citations by year
2026: 2 · 2025: 1 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 7 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 4 · 2015: 7 · 2014: 10 · 2013: 6 · 2012: 1
FWCI
2.25
Type
journal article
Language
en
Open access
Locations
  • American Journal of Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Georgia Clinical and Translational Science Alliance (UL‐1 RR024153)
  • National Institutes of Health (RR024153)
  • National Institute on Drug Abuse (R03DA024704)
  • National Center for Research Resources (RR-024153, UL1RR024153)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Epidemiology › Substance Abuse Treatment and Outcomes
Keywords
cocaine dependence, vesicular monoamine transporter 2, striatum, [11C]dihydrotetrabenazine, dopamine release, relapse, dopaminergic terminals, striatal subregions
MeSH terms
Adult, Corpus Striatum, Female, Humans, Male, Tetrabenazine, Case-Control Studies, Cocaine-Related Disorders, Positron-Emission Tomography, Vesicular Monoamine Transport Proteins

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