Single photon emission computerized tomography imaging of amphetamine-induced dopamine release in drug-free schizophrenic subjects
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The dopamine hypothesis of schizophrenia proposes that hyperactivity of dopaminergic transmission is associated with this illness, but direct observation of abnormalities of dopamine function in schizophrenia has remained elusive. We used a newly developed single photon emission computerized tomography method to measure amphetamine-induced dopamine release in the striatum of fifteen patients with schizophrenia and fifteen healthy controls. Amphetamine-induced dopamine release was estimated by the amphetamine-induced reduction in dopamine D2 receptor availability, measured as the binding potential of the specific D2 receptor radiotracer [123I] (S)-(-)-3-iodo-2-hydroxy-6-methoxy-N-[(1-ethyl-2-pyrrolidinyl) methyl]benzamide ([123I]IBZM). The amphetamine-induced decrease in [123I]IBZM binding potential was significantly greater in the schizophrenic group (-19.5 +/- 4.1%) compared with the control group (-7.6 +/- 2.1%). In the schizophrenic group, elevated amphetamine effect on [123I]IBZM binding potential was associated with emergence or worsening of positive psychotic symptoms. This result suggests that psychotic symptoms elicited in this experimental setting in schizophrenic patients are associated with exaggerated stimulation of dopaminergic transmission. Such an observation would be compatible with an abnormal responsiveness of dopaminergic neurons in schizophrenia.
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The most widely replicated dopaminergic abnormality in schizophrenia is elevated striatal dopamine availability in acute psychoses of both schizophrenia and epilepsy.
“The most widely replicated abnormality is that of elevated striatal dopamine availability – in acute psychoses of both schizophrenia (Laruelle et al., 1996; Breier et al., 1997) and epilepsy (Reith et al., 1994).”
From The Computational Anatomy of Psychosis (2013) · cites this paper as Laruelle et al., 1996
The Abstract reports greater amphetamine-induced dopamine release in the striatum of patients with schizophrenia than in controls, associated with emergence or worsening of positive psychotic symptoms. It does not establish elevated baseline dopamine availability during acute psychosis or describe this as the most widely replicated abnormality. The epilepsy finding is attached to a different citation in the citing sentence. (LLM, conf=0.86)
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Do patients with schizophrenia exhibit aberrant salience?
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The role of the brain reward system in depression
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Dopamine hypothesis of schizophrenia: Making sense of it all
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Self-citationBrain SPECT Imaging of Amphetamine-Induced Dopamine Release in Euthymic Bipolar Disorder Patients
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Sex: A Significant Risk Factor for Neurodevelopmental and Neurodegenerative Disorders
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What causes the onset of psychosis?
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Rethinking schizophrenia in the context of normal neurodevelopment
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Cannabidiol inhibits the hyperlocomotion induced by psychotomimetic drugs in mice
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Imaging glutamate in schizophrenia: review of findings and implications for drug discovery
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Glucocorticoid hormones and early brain development in schizophrenia
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Determinants of treatment response in first-episode psychosis: an 18F-DOPA PET study
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Self-citationRegulation of conditioned responses of basolateral amygdala neurons
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Neural basis of psychosis-related behaviour in the infection model of schizophrenia
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Sleep and circadian rhythm dysregulation in schizophrenia
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Cortical Cholinergic Transmission and Cortical Information Processing in Schizophrenia
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Dopamine’s Actions in Primate Prefrontal Cortex: Challenges for Treating Cognitive Disorders
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Amphetamine-induced displacement of [18F] fallypride in striatum and extrastriatal regions in humans
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Self-citationDopamine D2 receptor availability and amphetamine-induced dopamine release in unipolar depression
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Self-citationAcute prefrontal rTMS increases striatal dopamine to a similar degree as D-amphetamine
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Self-citationSpine pruning drives antipsychotic-sensitive locomotion via circuit control of striatal dopamine
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PET measures of amphetamine-induced dopamine release in ventral versus dorsal striatum
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Striatal and extrastriatal dopamine release measured with PET and [<sup>18</sup>F] fallypride
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Self-citationAn integrative framework for perceptual disturbances in psychosis
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Tracing the development of psychosis and its prevention: what can be learned from animal models
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The Neurobiology of Thought: The Groundbreaking Discoveries of Patricia Goldman-Rakic 1937-2003
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Functional Connectivity of the Striatum in Schizophrenia and Psychotic Bipolar Disorder
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Striatal dopamine, reward, and decision making in schizophrenia
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Association between schizophrenia and genetic variation in DCC: a case–control study
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- Authors
- Laruelle, M., Abi-Dargham, A., van Dyck, C. H., Gil, R., D'Souza, C. D., Erdos, J., McCance, E., Rosenblatt, W., Fingado, C., Zoghbi, S. S., Baldwin, R. M., Seibyl, J. P., Krystal, J. H., Charney, D. S., & Innis, R. B.
- Affiliations
- Yale University (US)
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06520, USA.
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 1996-08-20
- Volume
- 93
- Issue
- 17
- Pages
- 9235-9240
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC38625
- OpenAlex
- W1996327177
- Cited by
- 1,291
- References
- 2
- Citations by year
- 2026: 12 · 2025: 16 · 2024: 25 · 2023: 26 · 2022: 17 · 2021: 19 · 2020: 31 · 2019: 33 · 2018: 26 · 2017: 38 · 2016: 36 · 2015: 44 · 2014: 57 · 2013: 58 · 2012: 65
- FWCI
- 23.33
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- U.S. Department of Veterans Affairs
- Yale University
- National Alliance for Research on Schizophrenia and Depression
- U.S. Public Health Service
- National Institute of Mental Health (MH-54192, R01MH054192)
- National Center for Research Resources (M01RR000125, M01 RR-00125)
- 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, dopamine release, amphetamine challenge, dopamine D2 receptor, [123I]IBZM, striatum, dopamine hypothesis of schizophrenia, positive psychotic symptoms, dopamine signaling, SPECT imaging
- MeSH terms
- Adult, Amphetamine, Animals, Benzamides, Corpus Striatum, Dopamine, Female, Humans, Male, Papio, Psychoses, Substance-Induced, Pyrrolidines, Schizophrenia, Tomography, Emission-Computed, Single-Photon, Receptors, Dopamine D2, Dopamine Antagonists
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