Cited by 165Alzheimer's disease research and treatmentsTrace Elements in HealthDementia and Cognitive Impairment Research

Chronic copper exposure exacerbates both amyloid and tau pathology and selectively dysregulates cdk5 in a mouse model of AD

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Kitazawa, Masashi, Cheng, David, LaFerla, Frank M.·2009·Journal of Neurochemistry

Abstract

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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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
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
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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