Cited by 49Attention Deficit Hyperactivity DisorderNeurotransmitter Receptor Influence on BehaviorSchizophrenia research and treatment

Amphetamine-induced dopamine release and neurocognitive function in treatment-naive adults with ADHD

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Cherkasova, Mariya V, Faridi, Nazlie, Casey, Kevin F, O'Driscoll, Gillian A, Hechtman, Lily, Joober, Ridha, Baker, Glen B, Palmer, Jennifer +3 more·2014·Neuropsychopharmacology

Abstract

Converging evidence from clinical, preclinical, neuroimaging, and genetic research implicates dopamine neurotransmission in the pathophysiology of attention deficit hyperactivity disorder (ADHD). The in vivo neuroreceptor imaging evidence also suggests alterations in the dopamine system in ADHD; however, the nature and behavioral significance of those have not yet been established. Here, we investigated striatal dopaminergic function in ADHD using [(11)C]raclopride PET with a d-amphetamine challenge. We also examined the relationship of striatal dopamine responses to ADHD symptoms and neurocognitive function. A total of 15 treatment-free, noncomorbid adult males with ADHD (age: 29.87 ± 8.65) and 18 healthy male controls (age: 25.44 ± 6.77) underwent two PET scans: one following a lactose placebo and the other following d-amphetamine (0.3 mg/kg, p.o.), administered double blind and in random order counterbalanced across groups. In a separate session without a drug, participants performed a battery of neurocognitive tests. Relative to the healthy controls, the ADHD patients, as a group, showed greater d-amphetamine-induced decreases in striatal [(11)C]raclopride binding and performed more poorly on measures of response inhibition. Across groups, a greater magnitude of d-amphetamine-induced change in [(11)C]raclopride binding potential was associated with poorer performance on measures of response inhibition and ADHD symptoms. Our findings suggest an augmented striatal dopaminergic response in treatment-naive ADHD. Though in contrast to results of a previous study, this finding appears consistent with a model proposing exaggerated phasic dopamine release in ADHD. A susceptibility to increased phasic dopamine responsivity may contribute to such characteristics of ADHD as poor inhibition and impulsivity.

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Authors
Cherkasova, M. V., Faridi, N., Casey, K. F., O'Driscoll, G. A., Hechtman, L., Joober, R., Baker, G. B., Palmer, J., Dagher, A., Leyton, M., & Benkelfat, C.
Affiliations
  • McGill University (CA)
  • University of Alberta (CA)
Corresponding author
Benkelfat, Chawki
Venue
Neuropsychopharmacology
Published
2013-12-30
Volume
39
Issue
6
Pages
1498-1507
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2080032371
Cited by
49
References
53
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 3 · 2022: 6 · 2021: 6 · 2020: 3 · 2019: 1 · 2018: 4 · 2017: 3 · 2016: 8 · 2015: 4 · 2014: 3
FWCI
3.54
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (77728)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
Keywords
attention deficit hyperactivity disorder, dopamine release, striatum, response inhibition, neurocognitive function, treatment-naive adults, impulsivity, dopamine signaling
MeSH terms
Adult, Attention Deficit Disorder with Hyperactivity, Brain Mapping, Corpus Striatum, Dextroamphetamine, Dopamine, Humans, Inhibition, Psychological, Male, Neuropsychological Tests, Psychiatric Status Rating Scales, Radionuclide Imaging, Task Performance and Analysis, Dopamine Antagonists, Dopamine Uptake Inhibitors, Raclopride, Executive Function

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