Cited by 179Circadian rhythm and melatoninNeurological Disorders and TreatmentsAntioxidant Activity and Oxidative Stress

Neurotoxins: Free radical mechanisms and melatonin protection

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J. Reiter, Russel, C. Manchester, Lucien, Tan, Dun-Xian·2010·Current Neuropharmacology

Abstract

Toxins that pass through the blood-brain barrier put neurons and glia in peril. The damage inflicted is usually a consequence of the ability of these toxic agents to induce free radical generation within cells but especially at the level of the mitochondria. The elevated production of oxygen and nitrogen-based radicals and related non-radical products leads to the oxidation of essential macromolecules including lipids, proteins and DNA. The resultant damage is referred to as oxidative and nitrosative stress and, when the molecular destruction is sufficiently severe, it causes apoptosis or necrosis of neurons and glia. Loss of brain cells compromises the functions of the central nervous system expressed as motor, sensory and cognitive deficits and psychological alterations. In this survey we summarize the publications related to the following neurotoxins and the protective actions of melatonin: aminolevulinic acid, cyanide, domoic acid, kainic acid, metals, methamphetamine, polychlorinated biphenyls, rotenone, toluene and 6-hydroxydopamine. Given the potent direct free radical scavenging activities of melatonin and its metabolites, their ability to indirectly stimulate antioxidative enzymes and their efficacy in reducing electron leakage from mitochondria, it would be expected that these molecules would protect the brain from oxidative and nitrosative molecular mutilation. The studies summarized in this review indicate that this is indeed the case, an action that is obviously assisted by the fact that melatonin readily crosses the blood brain barrier.

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Authors
J. Reiter, R., C. Manchester, L., & Tan, D.-X.
Affiliations
The University of Texas at San Antonio Health Science Center (US)
Venue
Current Neuropharmacology
Published
2010-09-01
Volume
8
Issue
3
Pages
194-210
ISSN
1570-159X (ISSN-L)
OpenAlex
W2020386021
Cited by
179
References
281
Citations by year
2026: 2 · 2025: 5 · 2024: 4 · 2023: 13 · 2022: 15 · 2021: 8 · 2020: 12 · 2019: 5 · 2018: 16 · 2017: 18 · 2016: 21 · 2015: 10 · 2014: 11 · 2013: 16 · 2012: 15
FWCI
5.66
Type
journal article
Language
en
Open access
Locations
  • Current Neuropharmacology (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Neurology › Neurological Disorders and Treatments
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
neurotoxins, melatonin, free radicals, oxidative stress, nitrosative stress, blood-brain barrier, antioxidant enzymes, neuroprotection, 5-aminolevulinic acid, cyanide, domoic acid, kainic acid, methamphetamine, polychlorinated biphenyls, rotenone, toluene, 6-hydroxydopamine, lipid peroxidation, apoptosis, neurodegeneration

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