Reduction of oxidative stress, amyloid deposition, and memory deficit by manganese superoxide dismutase overexpression in a transgenic mouse model of Alzheimer's disease
Open accessAbstract
In Alzheimer's disease (AD), oxidative stress is present early and contributes to disease pathogenesis. We previously reported that in Tg19959 transgenic AD mice, partial deficiency of the mitochondrial antioxidant enzyme manganese superoxide dismutase (MnSOD) exacerbated amyloid pathology. We therefore asked whether MnSOD overexpression would prove beneficial against AD pathogenesis, by studying the offspring of Tg19959 mice crossed with MnSOD‐ overexpressing mice. At 4 mo of age, there was a 2‐ to 3‐fold increase in MnSOD protein levels in Tg19959‐ MnSOD mice compared to Tg19959 littermates. Tg19959‐MnSOD mice also had a 50% increase in catalase protein levels, a 50% decrease in levels of oxidized protein, and a 33% reduction in cortical plaque burden compared to Tg19959 littermates. Spatial memory was impaired and synaptophysin levels were decreased in Tg19959 mice compared to wild‐type littermates, but memory and synaptophysin levels were restored to wild‐type levels in Tg19959‐MnSOD littermates. These benefits occurred without changes in sodium dodecyl sulfate‐soluble or formic acid‐soluble Aβ pools or Aβ oligomers in Tg19959‐MnSOD mice compared to Tg19959 littermates. These data demonstrate that facilitation of the mitochondrial antioxidant response improves resistance to Aβ, slows plaque formation or increases plaque degradation, and markedly attenuates the phenotype in a transgenic AD mouse model.— Dumont, M.,Wille, E., Stack, C., Calingasan, N. Y., Beal, M. F., Lin, M. T. Reduction of oxidative stress, amyloid deposition, and memory deficit by manganese superoxide dismutase overexpression in a transgenic mouse model of Alzheimer's disease. FASEB J. 23, 2459–2466 (2009)
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Evidence supports a causative role for nitro-oxidative modifications in mediating early synaptic degeneration and cognitive decline in AD.
“Evidence supports a causative role for these modifications in mediating the early synaptic degeneration and cognitive decline in AD”
From The mitochondria-targeted antioxidant MitoQ prevents loss of spatial memory retention and early neuropathology in a transgenic mouse model of Alzheimer’s disease (2011) · cites this paper as Dumont et al., 2009
The Discussion reports that MnSOD overexpression in a transgenic AD mouse model decreased brain protein oxidation, restored synaptophysin levels, and improved memory performance. This supports a role for oxidative stress in the mouse model, but the paper does not establish that specific nitro-oxidative modifications cause early synaptic degeneration or cognitive decline in people with AD. (LLM, conf=0.84)
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- Authors
- Dumont, M., Wille, E., Stack, C., Calingasan, N. Y., Beal, M. F., & Lin, M. T.
- Affiliations
- Weill Cornell Medicine (US)
- Corresponding author
- Lin, Michael T.
- Venue
- The FASEB Journal
- Publisher
- Wiley
- Published
- 2009-04-03
- Volume
- 23
- Issue
- 8
- Pages
- 2459-2466
- ISSN
- 0892-6638 (ISSN-L)
- 1530-6860
- PMC
- PMC2717785
- OpenAlex
- W2033710792
- Cited by
- 221
- References
- 4
- Citations by year
- 2026: 5 · 2025: 5 · 2024: 3 · 2023: 8 · 2022: 6 · 2021: 9 · 2020: 16 · 2019: 11 · 2018: 9 · 2017: 12 · 2016: 17 · 2015: 14 · 2014: 16 · 2013: 19 · 2012: 11
- FWCI
- 15.50
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- The FASEB Journal (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (AG20729)
- 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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
- Keywords
- Alzheimer's disease, manganese superoxide dismutase, oxidative stress, amyloid deposition, amyloid plaques, memory impairment, transgenic mouse model, catalase, oxidized proteins, synaptophysin, amyloid-beta
- MeSH terms
- Alzheimer Disease, Animals, Brain, Catalase, Disease Models, Animal, Female, Humans, Male, Memory Disorders, Mice, Inbred C57BL, Mice, Transgenic, Mutation, Recombinant Proteins, Superoxide Dismutase, Gene Expression, Amyloid beta-Protein Precursor, Synaptophysin, Oxidative Stress, Mice, Plaque, Amyloid
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