Chronic copper exposure exacerbates both amyloid and tau pathology and selectively dysregulates cdk5 in a mouse model of AD
Open accessAbstract
Excess copper exposure is thought to be linked to the development of Alzheimer’s disease (AD) neuropathology. However, the mechanism by which copper affects the CNS remains unclear. To investigate the effect of chronic copper exposure on both beta‐amyloid and tau pathologies, we treated young triple transgenic (3×Tg‐AD) mice with 250 ppm copper‐containing water for a period of 3 or 9 months. Copper exposure resulted in altered amyloid precursor protein processing; increased accumulation of the amyloid precursor protein and its proteolytic product, C99 fragment, along with increased generation of amyloid‐beta peptides and oligomers. These changes were found to be mediated via up‐regulation of BACE1 as significant increases in BACE1 levels and deposits were detected around plaques in mice following copper exposure. Furthermore, tau pathology within hippocampal neurons was exacerbated in copper‐exposed 3×Tg‐AD group. Increased tau phosphorylation was closely correlated with aberrant cdk5/p25 activation, suggesting a role for this kinase in the development of copper‐induced tau pathology. Taken together, our data suggest that chronic copper exposure accelerates not only amyloid pathology but also tau pathology in a mouse model of AD.
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Copper can bind to tau in vitro and enhance tau phosphorylation by activating CDK5/P25 in AD transgenic mice.
“Copper can bind to tau in vitro [542, 543], and enhance tau phosphorylation by activating CDK5/P25 in AD transgenic mice (APPswe, PS1, P301Ltau) [544, 545].”
From Molecular and cellular mechanisms underlying the pathogenesis of Alzheimer’s disease (2020) · cites this paper as [544]
Elevated intracellular calcium levels promote hyperphosphorylation of tau protein, ultimately leading to NFT formation.
“Elevated intracellular calcium levels also promote the hyperphosphorylation of tau protein, ultimately leading to NFT formation [147].”
From Role of Tau Protein in Neurodegenerative Diseases and Development of Its Targeted Drugs: A Literature Review (2024) · cites this paper as [147]
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“Elevated intracellular calcium levels also promote the hyperphosphorylation of tau protein, ultimately leading to NFT formation [147].”
BackgroundThe role of copper and the copper-related protein CUTA in mediating APP processing and Aβ generation
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- Authors
- Kitazawa, M., Cheng, D., & LaFerla, F. M.
- Affiliations
- University of California, Irvine (US)
- Corresponding author
- Kitazawa, Masashi
- Venue
- Journal of Neurochemistry
- Publisher
- Wiley
- Published
- 2009-02-23
- Volume
- 108
- Issue
- 6
- Pages
- 1550-1560
- ISSN
- 0022-3042 (ISSN-L)
- 1471-4159
- PMC
- PMC4096128
- OpenAlex
- W2034386801
- Cited by
- 165
- References
- 38
- Citations by year
- 2026: 9 · 2025: 8 · 2024: 12 · 2023: 11 · 2022: 8 · 2021: 10 · 2020: 15 · 2019: 15 · 2018: 8 · 2017: 10 · 2016: 9 · 2015: 8 · 2014: 9 · 2013: 7 · 2012: 9
- FWCI
- 5.54
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Journal of Neurochemistry (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute on Aging (P01AG000538, P50 AG 16573, AG0212982, AG 00538, AG17968, R01AG017968, P50AG016573, R01AG021982)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (K99AR054695)
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Keywords
- chronic copper exposure, Alzheimer's disease, amyloid-beta, tau pathology, cyclin-dependent kinase 5, p25, BACE1, APP processing, tau phosphorylation, hippocampal neurons
- MeSH terms
- Superoxide Dismutase-1, Alzheimer Disease, Amyloid, Animals, Brain, Calpain, Copper, Disease Models, Animal, Enzyme-Linked Immunosorbent Assay, Humans, Mice, Transgenic, Mutation, Peptide Fragments, Superoxide Dismutase, Time Factors, Trace Elements, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, tau Proteins, Cell Line, Tumor, Immunoprecipitation, Cyclin-Dependent Kinase 5, Mice
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