Cited by 87Neurotransmitter Receptor Influence on BehaviorNicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology Research

Disruption of dopaminergic neurotransmission in nucleus accumbens core inhibits the locomotor stimulant effects of nicotine and d-amphetamine in rats

Boye, Sandra M, Grant, Rebecca J, Clarke, Paul B.S·2001·Neuropharmacology

Abstract

The locomotor stimulant effects of nicotine and amphetamine appear to be dependent on dopamine transmission in the nucleus accumbens. The present aim was to elucidate the contributions of the accumbens core and medial shell to these effects. In the first experiment, rats received bilateral intra-accumbens infusion of the dopaminergic antagonist eticlopride (or saline) prior to saline or nicotine (0.2 mg/kg s.c.) challenge. Eticlopride inhibited basal and nicotine-induced locomotor activity more effectively when infused into the core (0.0625--0.5 microg/side) than into the medial shell (0.5--1 microg/side). In a second experiment, rats received 6-hydroxydopamine infused into the core or medial shell, and were subsequently tested with saline, nicotine (0.2 mg/kg s.c.) and D-amphetamine (0.75 mg/kg s.c.). Residual dopaminergic innervation was assessed by autoradiographic [(125)I]RTI-55 labelling of the dopamine transporter. [(125)I]RTI-55 labelling in the accumbens core was positively correlated with the locomotor stimulant effects of both nicotine and D-amphetamine. In contrast, [(125)I]RTI-55 labelling in the medial shell was associated negatively with amphetamine-induced activity. Recent evidence suggests that dopamine release in the medial shell may mediate the reinforcing effect of nicotine and D-amphetamine. In contrast, the present findings suggest that dopamine release in the core subregion contributes preferentially to the locomotor stimulant effects of nicotine and D-amphetamine.

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Crossref · 10.1016/s0028-3908(01)00003-x

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Authors
Boye, S. M., Grant, R. J., & Clarke, P. B. S.
Affiliations
McGill University (CA)
Corresponding author
Boye, Sandra M
Venue
Neuropharmacology
Publisher
Elsevier BV
Published
2001-05
Volume
40
Issue
6
Pages
792-805
ISSN
0028-3908 (ISSN-L)
OpenAlex
W2023509166
Cited by
87
References
67
Citations by year
2024: 1 · 2023: 1 · 2021: 1 · 2020: 5 · 2019: 2 · 2018: 1 · 2017: 4 · 2016: 2 · 2015: 5 · 2014: 1 · 2013: 5 · 2012: 6
FWCI
1.72
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • McGill University
  • Medical Research Council Canada
  • H. Lundbeck A/S
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
nucleus accumbens core, dopamine signaling, nicotine, d-amphetamine, locomotor stimulant effects, eticlopride, 6-hydroxydopamine, dopamine transporter, dopamine release
MeSH terms
Animals, Dextroamphetamine, Dopamine, Male, Motor Activity, Nicotine, Nucleus Accumbens, Oxidopamine, Rats, Sprague-Dawley, Adrenergic Agents, Nicotinic Agonists, Dopamine Uptake Inhibitors, Rats

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