Cited by 2,208Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Synapse Loss and Microglial Activation Precede Tangles in a P301S Tauopathy Mouse Model

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Yoshiyama, Yasumasa, Higuchi, Makoto, Zhang, Bin, Huang, Shu-Ming, Iwata, Nobuhisa, Saido, Takaomi C., Maeda, Jun, Suhara, Tetsuya +2 more·2007·Neuron

Abstract

Filamentous tau inclusions are hallmarks of Alzheimer's disease (AD) and related tauopathies, but earlier pathologies may herald disease onset. To investigate this, we studied wild-type and P301S mutant human tau transgenic (Tg) mice. Filamentous tau lesions developed in P301S Tg mice at 6 months of age, and progressively accumulated in association with striking neuron loss as well as hippocampal and entorhinal cortical atrophy by 9-12 months of age. Remarkably, hippocampal synapse loss and impaired synaptic function were detected in 3 month old P301S Tg mice before fibrillary tau tangles emerged. Prominent microglial activation also preceded tangle formation. Importantly, immunosuppression of young P301S Tg mice with FK506 attenuated tau pathology and increased lifespan, thereby linking neuroinflammation to early progression of tauopathies. Thus, hippocampal synaptic pathology and microgliosis may be the earliest manifestations of neurodegenerative tauopathies, and abrogation of tau-induced microglial activation could retard progression of these disorders.

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Crossref · 10.1016/j.neuron.2007.01.010

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  • Microglia activation precedes tau aggregation and promotes tau hyperphosphorylation, subsequently leading to formation of NFTs.

    “since activation of microglia precedes tau aggregation41 and promotes tau hyperphosphorylation which subsequently leads to the formation of NFTs.42”

    From Role of neuroinflammation in neurodegeneration development (2023) · cites this paper as [41]

  • Neuroinflammation is an early feature of pathophysiology in mouse models of tauopathy, where inflammatory changes precede the accumulation of aggregated tau, and pro-inflammatory molecules increase tau hyperphosphorylation and aggregation.

    “Neuroinflammation is an early feature of pathophysiology in mouse models of tauopathy, where inflammatory changes precede the accumulation of aggregated tau (Yoshiyama et al., 2007) and pro-inflammatory molecules increase tau hyperphosphorylation and aggregation (Bhaskar et al., 2010).”
  • The study used 9-month-old animals, when each model exhibits robust amyloid and/or tau pathology, and included equal numbers of males and females.

    “We used 9‐month‐old animals, when each model exhibits robust amyloid and/or tau pathology, 11 , 12 , 43 and included equal numbers of males and females.”
  • PS19 mice exhibit age-dependent accumulation of pTau, microgliosis, and neurodegeneration from 3 to 9 months of age, resulting in a shortened life span (9-12 months of age).

    “Whereas PS19 mice exhibit age-dependent accumulation of pTau, microgliosis, and neurodegeneration from 3 to 9 months of age, resulting in a shortened life span in this model (9–12 months of age) (Yoshiyama et al. 2007)”
  • Neurodegeneration is a hallmark of AD in both demented patients and aged PS19 mice.

    “Neurodegeneration is a hallmark of AD in both demented patients and aged PS19 mice (Yoshiyama et al. 2007; Terry et al. 1991).”

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Authors
Yoshiyama, Y., Higuchi, M., Zhang, B., Huang, S.-M., Iwata, N., Saido, T. C., Maeda, J., Suhara, T., Trojanowski, J. Q., & Lee, V. M.-Y.
Affiliations
  • Chiba East Hospital (JP)
  • RIKEN Center for Brain Science (JP)
  • University of Pennsylvania (US)
  • National Institute of Radiological Sciences (JP)
Corresponding author
Lee, Virginia M.-Y.
Venue
Neuron
Publisher
Elsevier BV
Published
2007-02
Volume
53
Issue
3
Pages
337-351
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2057249855
Cited by
2,208
References
63
Citations by year
2026: 138 · 2025: 216 · 2024: 180 · 2023: 210 · 2022: 180 · 2021: 161 · 2020: 166 · 2019: 107 · 2018: 126 · 2017: 99 · 2016: 96 · 2015: 85 · 2014: 90 · 2013: 69 · 2012: 59
FWCI
34.85
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, cc-by-nc-nd)
Funders
  • University of Pennsylvania
  • Astellas Foundation for Research on Metabolic Disorders
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
tauopathy, Alzheimer's disease, synaptic loss, microglial activation, tau tangles, hippocampal atrophy, entorhinal cortex, neuroinflammation, transgenic mouse model, early neurodegeneration, lifespan extension
MeSH terms
Aging, Amygdala, Animals, Atrophy, Brain, Gliosis, Humans, Immunohistochemistry, Immunosuppressive Agents, Macrophage Activation, Microscopy, Electron, Microtubules, Nerve Degeneration, Phosphorylation, Solubility, Spinal Cord, Synapses, Blotting, Western, Tacrolimus, Neurofibrillary Tangles, tau Proteins, Microglia, Amyloid Neuropathies, Mossy Fibers, Hippocampal, Mice

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