Cited by 565Schizophrenia research and treatmentNeurotransmitter Receptor Influence on BehaviorParkinson's Disease Mechanisms and Treatments

Increased Synaptic Dopamine Function in Associative Regions of the Striatum in Schizophrenia

Kegeles, Lawrence S., Abi-Dargham, Anissa, Frankle, W. Gordon, Gil, Roberto, Cooper, Thomas B., Slifstein, Mark, Hwang, Dah-Ren, Huang, Yiyun +2 more·2010·Archives of General Psychiatry

Abstract

CONTEXT: A long-standing version of the dopamine hypothesis of schizophrenia postulates that hyperactivity of dopaminergic transmission at D(2) receptors in the limbic striatum is associated with the illness and that blockade of mesolimbic D(2) receptors is responsible for the antipsychotic action of D(2) receptor antagonists. OBJECTIVE: To localize dopaminergic hyperactivity within the striatum in schizophrenia. DESIGN: Case-control study. SETTING: Inpatient research unit. PARTICIPANTS: Eighteen untreated patients with schizophrenia and 18 healthy control subjects matched for age, sex, ethnicity, parental socioeconomic status, cigarette smoking, and weight. MAIN OUTCOME MEASURES: Percentage change in dopamine D(2) receptor availability in striatal subregions within each subject measured by positron emission tomography with carbon 11-labeled raclopride before and during pharmacologically induced dopamine depletion. RESULTS: In the associative striatum, acute dopamine depletion resulted in a larger increase in D(2) receptor availability in patients with schizophrenia (mean [SD], 15% [7%]) than in control subjects (10% [7%], P = .045), suggesting higher synaptic dopamine concentration. Within the associative striatum, this effect was most pronounced in the precommissural dorsal caudate (15% [8%] in patients vs 9% [8%] in controls, P = .03). No between-group differences were observed in the limbic and sensorimotor striatum. CONCLUSIONS: These findings suggest that schizophrenia is associated with elevated dopamine function in associative regions of the striatum. Because the precommissural dorsal caudate processes information from the dorsolateral prefrontal cortex, this observation also suggests that elevated subcortical dopamine function might adversely affect performance of the dorsolateral prefrontal cortex in schizophrenia. On the other hand, the absence of a group difference in the limbic striatum brings into question the therapeutic relevance of the mesolimbic selectivity of second-generation antipsychotic drugs.

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Crossref · 10.1001/archgenpsychiatry.2010.10

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Authors
Kegeles, L. S., Abi-Dargham, A., Frankle, W. G., Gil, R., Cooper, T. B., Slifstein, M., Hwang, D.-R., Huang, Y., Haber, S. N., & Laruelle, M.
Affiliations
Columbia University Irving Medical Center (US)
Venue
Archives of General Psychiatry
Published
2010-03-01
Volume
67
Issue
3
Pages
231
ISSN
0003-990X (ISSN-L)
OpenAlex
W1999984108
Cited by
565
References
89
Citations by year
2026: 17 · 2025: 26 · 2024: 33 · 2023: 25 · 2022: 42 · 2021: 23 · 2020: 32 · 2019: 42 · 2018: 32 · 2017: 38 · 2016: 45 · 2015: 41 · 2014: 47 · 2013: 32 · 2012: 47
FWCI
25.78
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of General Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (K02MH01603-01, K02MH001603, R01MH054192)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
schizophrenia, synaptic dopamine, associative striatum, dorsal caudate, dopamine depletion, mesolimbic dopamine system, dopamine hypothesis of schizophrenia, atypical antipsychotics, dorsolateral prefrontal cortex, positron emission tomography, raclopride
MeSH terms
Adult, Brain Mapping, Carbon Radioisotopes, Caudate Nucleus, Corpus Striatum, Dopamine, Female, Humans, Image Processing, Computer-Assisted, Male, Synaptic Transmission, Putamen, Schizophrenia, Synapses, Case-Control Studies, Prefrontal Cortex, Receptors, Dopamine D2, alpha-Methyltyrosine, Raclopride, Positron-Emission Tomography

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