Cited by 93Alcohol Consumption and Health EffectsNeuroscience and Neuropharmacology ResearchRedox biology and oxidative stress

DISTRIBUTION OF CATALASE IN RAT BRAIN: AMINERGIC NEURONS AS POSSIBLE TARGETS FOR ETHANOL EFFECTS

ZIMATKIN, S. M., LINDROS, K. O.·1996·Alcohol and Alcoholism

Abstract

Ethanol is metabolized at a slow but measurable rate in rodent brain. Recent studies indicate that this process is mediated mainly by catalase. The spatial distribution of this enzyme in different brain structures is poorly known. To explore possible local imbalances between the production and elimination of ethanol-derived acetaldehyde, we investigated the regional and cellular distribution of catalase, histo- and immunohistochemically, using serial cryostat sections from male Wistar rats. Compared to the strong peroxisomal staining seen in liver, brain catalase staining was weak and was not immunologically detected with an anti-sheep bovine catalase antibody. Activity was observed only in microperoxisomes, mainly in perikaryons of aminergic neurons, in the known groups of adrenergic, nonadrenergic and serotonergic neurons of the brain stem. Little peroxisomal staining was seen in other types of brain structures. This result contrasted to that of aldehyde dehydrogenase, which we previously observed to be widely distributed in brain structures, but with low activity in perikaryons of aminergic (especially catecholaminergic) neurons, as compared to cholinergic neurons. Our data indicate that catalase-mediated oxidation of ethanol to acetaldehyde takes place mainly in aminergic neurons, which seem to have a limited capacity for the subsequent removal via aldehyde dehydrogenase. This suggests that locally produced acetaldehyde could mediate CNS effects of ethanol in these structures.

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  1. Novikoff. A. B. and Novikoff. P. M. (1973) Micro- peroxisomes. Journal of Htslochemistrv and Cyto- chemistry 21, 963-966.
  2. Zimatkin. S. M. and Ostrovsky. Yu. M. (1988) Aldehyde dehydrogenase activity in barrier brain structures. Bulletin Eksperimentalnoj Biologu t Meditsmv 9, 283- 284.

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Authors
ZIMATKIN, S. M., & LINDROS, K. O.
Affiliations
National Academy of Sciences of Belarus (BY)
Corresponding author
LINDROS, K. O.
Venue
Alcohol and Alcoholism
Published
1996-03-01
Volume
31
Issue
2
Pages
167-174
ISSN
  • 0735-0414 (ISSN-L)
  • 1464-3502
OpenAlex
W2033604860
Cited by
93
References
39
Citations by year
2026: 1 · 2025: 2 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 3 · 2015: 4 · 2014: 5 · 2013: 10 · 2012: 1
FWCI
1.40
Type
journal article
Language
en
Open access
closed
Locations
  • Alcohol and Alcoholism (publishedVersion)
  • PubMed (publishedVersion)
  • STM:n Hallinnonalan avoin julkaisuarkisto (Julkari) (submittedVersion)
Funders
European Science Foundation
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
catalase, alcohol metabolism, acetaldehyde, aminergic neurons, brainstem, adrenergic neurons, serotonergic neurons, catecholaminergic neurons, cholinergic neurons, aldehyde dehydrogenase, microperoxisomes, peroxisomes, ethanol neurotoxicity, regional enzyme distribution
MeSH terms
Acetaldehyde, Aldehyde Dehydrogenase, Animals, Brain, Brain Mapping, Brain Stem, Catalase, Cattle, Epinephrine, Liver, Male, Nerve Fibers, Norepinephrine, Serotonin, Sheep, Rats, Wistar, Rats

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