Cited by 199Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

The Role of Caspase Cleavage of Tau in Alzheimer Disease Neuropathology

Cotman, Carl W., Poon, Wayne W., Rissman, Robert A., Blurton-Jones, Mathew·2005·Journal of Neuropathology & Experimental Neurology

Abstract

Alzheimer disease (AD) is characterized by the accumulation of amyloid plaques and neurofibrillary tangles within selective brain regions. In addition, cell death pathways become active leading to neurodegeneration. Caspase activation, a key step in the programmed cell death pathway known as apoptosis, occurs in AD and leads to the proteolytic cleavage of several neuronal proteins. Previously, it was hypothesized that the development of the classical hallmarks of AD, amyloid plaques and neurofibrillary tangles, occur independently and do not involve the activation of caspases. However, recent studies suggest that plaques, tangles, and caspase activation share a common pathway. Beta-amyloid, the main component of amyloid plaques, activates caspases. Activated caspases can in turn cleave tau, the main component of neurofibrillary tangles. Caspase-cleaved tau (deltatau) may initiate or accelerate the development of tangle pathology. Tau, when cleaved by caspases at Asp421, "seeds" filamentous aggregates in vitro. Caspase-cleaved tau also adopts the MC1 conformation, one of the earliest pathologic events in tangle formation. Importantly, deltatau occurs early in the development of tangle pathology within AD brains and in a transgenic mouse model of AD. This review summarizes recent evidence suggesting that caspase cleavage of tau plays an important role in the development of neurofibrillary tangle pathology. In addition, a model is presented whereby caspase cleavage of tau provides a mechanistic link between the development of amyloid and tangle pathologies.

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Crossref · 10.1093/jnen/64.2.104

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Authors
Cotman, C. W., Poon, W. W., Rissman, R. A., & Blurton-Jones, M.
Affiliations
University of California, Irvine (US)
Corresponding author
Cotman, Carl W.
Venue
Journal of Neuropathology & Experimental Neurology
Published
2005-02
Volume
64
Issue
2
Pages
104-112
ISSN
  • 0022-3069 (ISSN-L)
  • 1554-6578
OpenAlex
W99707707
Cited by
199
References
85
Citations by year
2026: 1 · 2025: 7 · 2024: 10 · 2023: 7 · 2022: 9 · 2021: 8 · 2020: 11 · 2019: 6 · 2018: 4 · 2017: 9 · 2016: 6 · 2015: 3 · 2014: 2 · 2013: 14 · 2012: 12
FWCI
2.42
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuropathology & Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (P01AG000538, P50AG016573, F32-AG0234333)
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, neurofibrillary tangles, amyloid plaques, amyloid-beta, apoptosis, neurodegeneration, tau conformation, tau aggregation, transgenic mouse model
MeSH terms
Alzheimer Disease, Animals, Brain, Enzyme Activation, Humans, Models, Neurological, Amyloid beta-Peptides, Neurofibrillary Tangles, tau Proteins, Caspases

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