IMR Press / FBE / Volume 4 / Issue 4 / DOI: 10.2741/e465

Frontiers in Bioscience-Elite (FBE) is published by IMR Press from Volume 13 Issue 2 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Review

Ethanol and adult CNS neurodamage: oxidative stress, but possibly not excitotoxicity

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1 Department of Molecular Pharmacology and Therapeutics, Loyola University Chicago, Stritch School of Medicine, Maywood IL 60153

*Author to whom correspondence should be addressed.

 

Front. Biosci. (Elite Ed) 2012, 4(4), 1358–1367; https://doi.org/10.2741/e465
Published: 1 January 2012
Abstract

Evidence from experiments with adult rodents chronically treated with ethanol via either repetitive binges or continuous intake/exposure supports the occurrence of brain oxidative stress and, at least in binge intoxication/rat models, its essential causative role in neurodamage. However, pharmacological antagonism experiments reveal that N-methyl-D-aspartate (NMDA) receptor-dependent excitotoxicity is not responsible for adult mammalian brain neurodegeneration caused by repetitive binge ethanol intoxication and withdrawals. Since NMDA receptor antagonists apparently are untested with respect to neuronal death/loss in continuous intake/ingestion rodent models, e.g., ethanol/water or ethanol/liquid diets, it is therefore erroneous to assert, as is often done, that excitotoxicity is an important mechanism for ethanol-induced adult mammalian brain (neuronal) damage. Alternatively, results from several laboratories indicate that neurodegeneration due to chronic binge ethanol exposure/withdrawal may be dependent on redox transcription factor signaling and neuroinflammatory/oxidative stress pathways (increased arachidonic acid mobilization and pro-inflammatory cytokines; decreased anti-inflammatory cytokines) downstream of microglial/astroglial activation and moderate yet significant brain edema.

Keywords
Alcohol
NMDA Antagonist
Reactive Oxygen Species
Brain Damage
Neuroinflammation
Edema
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