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- W2012954908 abstract "Chronic alcohol abuse has deleterious effects on several organs in the body including the brain. Neuroradiological studies have demonstrated that the brains of chronic alcoholics undergo loss of both gray and white matter volumes. Neuropathological studies using unbiased stereological methods have provided evidence for loss of neurons in specific parts of the brain in chronic alcoholics. The purpose of this paper is to propose a mechanism for this alcohol related neuronal loss. The hypothesis is based on the neurodegeneration observed in patients with the genetic disorder xeroderma pigmentosum (XP), who lack the capacity to carry out a specific type of DNA repair called nucleotide excision repair (NER). Some XP patients develop a progressive atrophic neurodegeneration, termed XP neurological disease, indicating that endogenous DNA damage that is normally repaired by NER has the capacity to cause neuronal death. Accumulating evidence indicates that the neurodegenerative DNA damage that is responsible for neuronal loss in XP patients results from reactive oxygen species (ROS) and lipid peroxidation products, and has the capacity to inhibit gene expression by RNA polymerase II. Therefore, the following model is proposed: chronic alcohol abuse results in increased levels of ROS and lipid peroxidation products in neurons, which results in an overwhelming burden on the NER pathway, and increased steady state levels of DNA lesions that inhibit gene expression. This results in neuronal death either by reduction in the levels of essential gene products or by apoptosis. The implications of this model for future studies are discussed." @default.
- W2012954908 created "2016-06-24" @default.
- W2012954908 creator A5056581324 @default.
- W2012954908 date "2000-11-01" @default.
- W2012954908 modified "2023-09-26" @default.
- W2012954908 title "Brain atrophy and neuronal loss in alcoholism: a role for DNA damage?" @default.
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- W2012954908 doi "https://doi.org/10.1016/s0197-0186(00)00051-6" @default.
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- W2012954908 hasPublicationYear "2000" @default.
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