Cited by 54Neurotransmitter Receptor Influence on BehaviorSchizophrenia research and treatmentParkinson's Disease Mechanisms and Treatments

Behavioral changes and [123I]IBZM equilibrium SPECT measurement of amphetamine-induced dopamine release in rhesus monkeys exposed to subchronic amphetamine

Castner, S·2000·Neuropsychopharmacology

Abstract

Previously we have shown that twelve weeks of repeated low-dose d-amphetamine (AMPH) exposure in rhesus monkeys induces a long-lasting enhancement of behavioral responses to acute low-dose challenge. The present study was designed to investigate the behavioral and neurochemical consequences of a six-week regimen of low-dose AMPH exposure (0.1-1.0 mg/kg, i.m., b.i.d.) in rhesus monkeys. SPECT imaging of AMPH's (0.4 mg/kg) ability to displace [123I]IBZM bound to D2 dopamine receptors in the striatum of saline control and AMPH-treated animals prior to and following chronic treatment was accomplished using a bolus/constant infusion paradigm. Following chronic AMPH treatment, all monkeys showed an enhanced behavioral response to acute AMPH challenge and a significant decrease in the percent of AMPH-induced displacement of [123I]IBZM in striatum compared to their pretreatment scans. These findings suggest that relatively small changes in presynaptic dopamine function may be reflected in significant alterations in the behavioral response to acute AMPH challenge.

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Crossref · 10.1016/s0893-133x(99)00080-9

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Authors
Castner, S.
Affiliations
Yale University (US)
Corresponding author
Castner, S
Venue
Neuropsychopharmacology
Published
2000-01
Volume
22
Issue
1
Pages
4-13
ISSN
0893-133X (ISSN-L)
OpenAlex
W1975995220
Cited by
54
References
33
Citations by year
2023: 1 · 2022: 2 · 2020: 2 · 2018: 2 · 2016: 1 · 2015: 3 · 2014: 7 · 2013: 2 · 2012: 2
FWCI
1.42
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH 44866, P50MH044866)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
amphetamine, dopamine release, dopamine D2 receptor, [123I]IBZM, striatum, SPECT imaging, behavioral sensitization, rhesus monkeys
MeSH terms
Animals, Benzamides, Cerebellum, Corpus Striatum, Dextroamphetamine, Dopamine, Drug Administration Schedule, Female, Injections, Intravenous, Iodine Radioisotopes, Macaca mulatta, Male, Motor Activity, Pyrrolidines, Stereotyped Behavior, Tomography, Emission-Computed, Single-Photon, Receptors, Dopamine D2, Dopamine Antagonists

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