Cited by 236Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Amyloid accelerates tau propagation and toxicity in a model of early Alzheimer’s disease

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Pooler, Amy M, Polydoro, Manuela, Maury, Eduardo A, Nicholls, Samantha B, Reddy, Snigdha M, Wegmann, Susanne, William, Christopher, Saqran, Lubna +6 more·2015·Acta Neuropathologica Communications

Abstract

INTRODUCTION: In early stages of Alzheimer's disease (AD), neurofibrillary tangles (NFT) are largely restricted to the entorhinal cortex and medial temporal lobe. At later stages, when clinical symptoms generally occur, NFT involve widespread limbic and association cortices. At this point in the disease, amyloid plaques are also abundantly distributed in the cortex. This observation from human neuropathological studies led us to pose two alternative hypotheses: that amyloid in the cortex is permissive for the spread of tangles from the medial temporal lobe, or that these are co-occurring but not causally related events simply reflecting progression of AD pathology. RESULTS: We now directly test the hypothesis that cortical amyloid acts as an accelerant for spreading of tangles beyond the medial temporal lobe. We crossed rTgTauEC transgenic mice that demonstrate spread of tau from entorhinal cortex to other brain structures at advanced age with APP/PS1 mice, and examined mice with either NFTs, amyloid pathology, or both. We show that concurrent amyloid deposition in the cortex 1) leads to a dramatic increase in the speed of tau propagation and an extraordinary increase in the spread of tau to distal brain regions, and 2) significantly increases tau-induced neuronal loss. CONCLUSIONS: These data strongly support the hypothesis that cortical amyloid accelerates the spread of tangles throughout the cortex and amplifies tangle-associated neural system failure in AD.

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Authors
Pooler, A. M., Polydoro, M., Maury, E. A., Nicholls, S. B., Reddy, S. M., Wegmann, S., William, C., Saqran, L., Cagsal-Getkin, O., Pitstick, R., Beier, D. R., Carlson, G. A., Spires-Jones, T. L., & Hyman, B. T.
Affiliations
  • Harvard University (US)
  • McLaughlin Research Institute (US)
  • Seattle Children's Research Institute (US)
Corresponding author
Hyman, Bradley T
Venue
Acta Neuropathologica Communications
Published
2015-03-24
Volume
3
Issue
1
Pages
14-14
ISSN
2051-5960 (ISSN-L)
OpenAlex
W2107141858
Cited by
236
References
30
Citations by year
2026: 9 · 2025: 20 · 2024: 20 · 2023: 26 · 2022: 20 · 2021: 24 · 2020: 30 · 2019: 17 · 2018: 25 · 2017: 23 · 2016: 16 · 2015: 5
FWCI
16.94
Type
journal article
Language
en
Open access
Locations
  • Acta Neuropathologica Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
Funders
  • Alzheimer's Association (ZEN-09-132524)
  • American Health Assistance Foundation
  • Glenn Foundation for Medical Research
  • Alzheimer's Society
  • National Institutes of Health
  • National Institute on Aging (R01AG026249, 5T32AG00022222, R00AG033670, P50AG005134, R21AG03885, T32AG000222, P30AG062421)
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, tau propagation, neurofibrillary tangles, tauopathy, cortical amyloid, entorhinal cortex, APP/PS1 mice, transgenic mouse model, neuronal loss, tau toxicity, disease progression
MeSH terms
Aging, Alzheimer Disease, Amyloid, Animals, Brain, Cerebral Cortex, Disease Models, Animal, Hippocampus, Humans, Mice, Transgenic, Neurons, Temporal Lobe, Neurofibrillary Tangles, tau Proteins, Disease Progression, Mice

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