Oxidative Damage Is the Earliest Event in Alzheimer Disease
| Autor: | Paul K. Jones, Keisuke Hirai, Gjumrakch Aliev, Shun Shimohama, Akihiko Nunomura, Mark A. Smith, George Perry, Atsushi Takeda, Hossein A. Ghanbari, Shigeru Chiba, Craig S. Atwood, Elizabeth Balraj, Takafumi Wataya, Robert B. Petersen |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Male
Apolipoprotein E Heterozygote Pathology medicine.medical_specialty Genotype 8-Hydroxyguanosine Plaque Amyloid Biology medicine.disease_cause Pathology and Forensic Medicine Cellular and Molecular Neuroscience chemistry.chemical_compound Apolipoproteins E Degenerative disease Alzheimer Disease medicine Humans Aged Neurons Amyloid beta-Peptides Guanosine Nitrotyrosine Neurodegeneration Brain Neurofibrillary Tangles Neurofibrillary tangle General Medicine Middle Aged medicine.disease Oxidative Stress Neurology chemistry Disease Progression Tyrosine Female Neurology (clinical) Alzheimer's disease Oxidative stress |
| Zdroj: | Journal of Neuropathology & Experimental Neurology. 60:759-767 |
| ISSN: | 1554-6578 0022-3069 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|