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E-4-hydroxy-2-nonenal is Cytotoxic and Cross-links Cytoskeletal Proteins in P19 Neuroglial Cultures

Overview
Journal Am J Pathol
Publisher Elsevier
Specialty Pathology
Date 1996 Jan 1
PMID 8546230
Citations 27
Authors
Affiliations
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Abstract

Lipid peroxidation increases with age in brain and is elevated further in Alzheimer's disease. E-4-hydroxy-2-nonenal and malondialdehyde are products of lipid peroxidation that can adduct and cross-link protein. Neurofibrillary tangles, a feature of Alzheimer's disease composed mostly of tau protein, contain cross-linked and ubiquitin-conjugated protein. In P19 neuroglial cultures, E-4-hydroxy-2-nonenal was a potent cytotoxin that cross-linked cytoskeletal proteins, including tau into high molecular weight species that were conjugated with ubiquitin. Malondialdehyde formed monoadducts with cell protein but did not cross-link and was not cytotoxic. A non-crosslinking analogue of E-4-hydroxy-2-nonenal was not cytotoxic. E-4-Hydroxy-2-nonenal may contribute to neurodegeneration and neurofibrillary tangle formation in Alzheimer's disease.

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