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4-Hydroxynonenal immunoreactivity is increased in human hippocampus after global ischemia

Record type: Article

Oxidative stress and lipid peroxidation may contribute to the pathology of neurodegenerative disorders such as Alzheimer’s disease (AD) and cerebral ischemia. 4-Hydroxynonenal (4-HNE) is a toxic by-product of lipid peroxidation, and immunoreactivity to 4-HNE has been used to examine lipid peroxidation in the pathogenesis of AD and ischemia. This study sought to determine 1) if there are cellular alterations in 4-HNE immunoreactivity in the human hippocampus after global ischemia, and 2) whether possession of an apolipoprotein E (APOE) e4 allele influenced the extent of 4-HNE immunoreactivity. 4-HNE immunoreactivity was assessed semi-quantitatively in the temporal lobe of a group of controls (n = 44) and in a group of patients who had an episode of global ischemia as a result of a cardiorespiratory arrest and subsequently died (n = 56, survival ranged from 1hr to 42days). There was minimal cellular 4-HNE immunoreactivity in the control group. However, compared to controls, 4-HNE immunoreactivity was significantly increased in neurons (p , 0.0002) and glia (p , 0.0001) in the hippocampal formation after global ischemia. Possession of an APOE e4 allele did not influence the extent of neuronal or glial 4-HNE immunostaining in the control or global ischemia group. There was a significant negative correlation between the extent of neuronal 4-HNE immunoreactivity with survival period after global ischemia (r2 = 0.0801; p , 0.036) and a significant positive correlation between the extent of glial 4-HNE immunoreactivity and survival after global ischemia (r2 = 0.2958; p , 0.0001). The data indicate a marked increase in neuronal and glial 4-HNE. This substantiates a role for lipid peroxidation in the pathogenesis of cerebral ischemia. There was no indication that APOE genotype influenced the extent of 4-HNE immunoreactivity.

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Citation

McKracken, Eileen, Graham, David I., Nilsen, Margaret, Stewart, Janice, Nicoll, James A.R. and Horsburgh, Karen (2001) 4-Hydroxynonenal immunoreactivity is increased in human hippocampus after global ischemia Brain Pathology, 11, (4), pp. 414-421.

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Published date: 2001

Identifiers

Local EPrints ID: 27657
URI: http://eprints.soton.ac.uk/id/eprint/27657
PURE UUID: 7fcd5551-9003-4c73-af70-eba352e01958
ORCID for James A.R. Nicoll: ORCID iD orcid.org/0000-0002-9444-7246

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Date deposited: 27 Apr 2006
Last modified: 17 Jul 2017 16:04

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Contributors

Author: Eileen McKracken
Author: David I. Graham
Author: Margaret Nilsen
Author: Janice Stewart
Author: Karen Horsburgh

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