Cited by 59Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchAlcohol Consumption and Health Effects

Motor Stimulant Effects of Ethanol Injected into the Substantia Nigra Pars Reticulata: Importance of Catalase-Mediated Metabolism and the Role of Acetaldehyde

Arizzi-LaFrance, Maria N, Correa, Mercè, Aragon, Carlos M G, Salamone, John D·2006·Neuropsychopharmacology

Abstract

A series of experiments was conducted to investigate the locomotor effects of local injections of ethanol and the ethanol metabolite, acetaldehyde, into substantia nigra pars reticulata (SNr). Infusions of ethanol into SNr resulted in a dose-related increase in locomotor activity, with maximal effects at a dose of 1.4 micromol. Ethanol injected into a control site dorsal to substantia nigra failed to stimulate locomotion, and another inactive site was identified in brainstem areas posterior to substantia nigra. The locomotor effects of intranigral ethanol (1.4 micromol) were reduced by coadministration of 10 mg/kg sodium azide, a catalase inhibitor that acts to reduce the metabolism of ethanol into acetaldehyde in the brain. SNr infusions of acetaldehyde, which is the first metabolite of ethanol, also increased locomotion. Taken together, these results indicate that SNr is one of the sites at which ethanol and acetaldehyde may be acting to induce locomotor activity. These results are consistent with the hypothesis that acetaldehyde is a centrally active metabolite of ethanol, and provide further support for the idea that catalase activity is a critical step in the regulation of ethanol-induced motor activity. These studies have implications for understanding the brain mechanisms involved in mediating the ascending limb of the biphasic dose-response curve for the effect of ethanol on locomotor activity.

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Crossref · 10.1038/sj.npp.1300849

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Authors
Arizzi-LaFrance, M. N., Correa, M., Aragon, C. M. G., & Salamone, J. D.
Affiliations
  • Universitat Jaume I (ES)
  • University of Connecticut (US)
Venue
Neuropsychopharmacology
Published
2005-08-17
Volume
31
Issue
5
Pages
997-1008
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2054532827
Cited by
59
References
124
Citations by year
2025: 3 · 2024: 1 · 2023: 1 · 2022: 5 · 2021: 4 · 2020: 1 · 2019: 1 · 2017: 4 · 2016: 2 · 2015: 1 · 2014: 2 · 2013: 9 · 2012: 4
FWCI
1.45
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
Keywords
ethanol, acetaldehyde, substantia nigra pars reticulata, locomotor activity, catalase, alcohol metabolism, sodium azide, biphasic dose-response, brainstem
MeSH terms
Acetaldehyde, Ethanol, Animals, Catalase, Central Nervous System Depressants, Disease Models, Animal, Dose-Response Relationship, Drug, Drug Interactions, Enzyme Inhibitors, Male, Motor Activity, Movement, Substantia Nigra, Rats, Sprague-Dawley, Sodium Azide, Alcohol-Induced Disorders, Nervous System, Rats

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