Cited by 99Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Plaque-derived oxidative stress mediates distorted neurite trajectories in the Alzheimer mouse model

Garcia-Alloza, Monica, Dodwell, Sarah A., Meyer-Luehmann, Melanie, Hyman, Bradley T., Bacskai, Brian J.·2006·Journal of Neuropathology & Experimental Neurology

Abstract

Alzheimer disease (AD) is characterized both by senile plaques and neurodegeneration, although the details of the relationship between the 2 are not well understood. We postulated that oxidative stress resulting from senile plaques may mediate plaques' effects on local neuronal processes. Using multiphoton microscopy, we directly demonstrate the generation of reactive oxygen species by senile plaques. After screening of several natural antioxidants ex vivo, we assessed in vivo the effect of 2 orally administered antioxidants in APPswe/PS1d9 transgenic mice. Both Ginkgo biloba extract and vitamin E reduced the oxidative stress resulting from senile plaques in vivo as monitored with intracranial imaging. Both treatments also lead to a progressive reversal of the structural changes in dystrophic neurites associated with senile plaques. These results suggest a causal relationship between plaque-associated oxidative stress and neuritic alterations and demonstrate for the first time that the focal neurotoxicity associated with the senile plaques of AD is partially reversible with antioxidant therapies. The quantitative ex vivo screen combined with in vivo monitoring of efficacy should lead to more effective clinical therapies for the prevention of oxidative stress and neurotoxicity in AD.

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Crossref · 10.1097/01.jnen.0000240468.12543.af

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  • Previous research using antioxidant therapies reduced oxidative stress and demonstrated reversible neuritic dystrophy in APP/PS1 transgenic mice.

    “This is supported by previous research, which utilized antioxidant therapies to reduce oxidative stress and demonstrated the reversible nature of the neuritic dystrophy observed due to AD pathology in APP/PS1 transgenic mice [105].”

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Authors
Garcia-Alloza, M., Dodwell, S. A., Meyer-Luehmann, M., Hyman, B. T., & Bacskai, B. J.
Affiliations
Massachusetts General Hospital (US)
Venue
Journal of Neuropathology & Experimental Neurology
Published
2006-11
Volume
65
Issue
11
Pages
1082-1089
ISSN
  • 0022-3069 (ISSN-L)
  • 1554-6578
OpenAlex
W2075000549
Cited by
99
References
47
Citations by year
2026: 1 · 2025: 3 · 2024: 7 · 2023: 1 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 5 · 2018: 4 · 2017: 3 · 2016: 7 · 2015: 6 · 2014: 2 · 2013: 2 · 2012: 8
FWCI
6.41
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuropathology & Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (AG024688, R01AG024688, R01AG020570, AG 020570)
  • National Institute of Biomedical Imaging and Bioengineering (EB 000768, R01EB000768)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, amyloid plaques, oxidative stress, reactive oxygen species, antioxidants, Ginkgo biloba extract, vitamin E, neurotoxicity, neurodegeneration
MeSH terms
Alzheimer Disease, Animals, Antioxidants, Disease Models, Animal, Mice, Transgenic, Plant Extracts, Vitamin E, Neurites, Reactive Oxygen Species, Oxidative Stress, Ginkgo biloba, Microscopy, Fluorescence, Multiphoton, Mice, Plaque, Amyloid

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