Plaque-derived oxidative stress mediates distorted neurite trajectories in the Alzheimer mouse model
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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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].”
From Centella Asiatica Improves Memory and Promotes Antioxidative Signaling in 5XFAD Mice (2019) · cites this paper as [105]
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“This is supported by previous research, which utilized antioxidant therapies to reduce oxidative stress an demonstrate the reversible nature of the neuritic dystrophy observed due to AD pathology in APP/PS1 transgenic mice [105].”
ResultTraditional used Plants against Cognitive Decline and Alzheimer Disease
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Self-citation
- 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
- Publisher
- Oxford University Press (OUP)
- 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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