Abstract:
:Recently, we demonstrated a significant increase of an oxidized nucleoside derived from RNA, 8-hydroxyguanosine (8OHG), and an oxidized amino acid, nitrotyrosine in vulnerable neurons of patients with Alzheimer disease (AD). To determine whether oxidative damage is an early- or end-stage event in the process of neurodegeneration in AD, we investigated the relationship between neuronal 8OHG and nitrotyrosine and histological and clinical variables, i.e. amyloid-beta (A beta) plaques and neurofibrillary tangles (NFT), as well as duration of dementia and apolipoprotein E (ApoE) genotype. Our findings show that oxidative damage is quantitatively greatest early in the disease and reduces with disease progression. Surprisingly, we found that increases in A beta deposition are associated with decreased oxidative damage. These relationships are more significant in ApoE epsilon4 carriers. Moreover, neurons with NFT show a 40%-56% decrease in relative 8OHG levels compared with neurons free of NFT. Our observations indicate that increased oxidative damage is an early event in AD that decreases with disease progression and lesion formation. These findings suggest that AD is associated with compensatory changes that reduce damage from reactive oxygen.
journal_name
J Neuropathol Exp Neuroljournal_title
Journal of neuropathology and experimental neurologyauthors
Nunomura A,Perry G,Aliev G,Hirai K,Takeda A,Balraj EK,Jones PK,Ghanbari H,Wataya T,Shimohama S,Chiba S,Atwood CS,Petersen RB,Smith MAdoi
10.1093/jnen/60.8.759subject
Has Abstractpub_date
2001-08-01 00:00:00pages
759-67issue
8eissn
0022-3069issn
1554-6578journal_volume
60pub_type
杂志文章abstract::The aim of this study was to clarify pathological and anatomical relationships between adamantinomatous craniopharyngiomas (ACP) and their surrounding structures. We previously established a QST classification scheme based on the apparent anatomic origin of the tumors. According to this classification, 13 type Q tumor...
journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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doi:
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journal_title:Journal of neuropathology and experimental neurology
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journal_title:Journal of neuropathology and experimental neurology
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