Cited by 81Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Tangle-Bearing Neurons Survive Despite Disruption of Membrane Integrity in a Mouse Model of Tauopathy

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de Calignon, Alix, Spires-Jones, Tara L., Pitstick, Rose, Carlson, George A., Hyman, Bradley T.·2009·Journal of Neuropathology & Experimental Neurology

Abstract

Neurofibrillary tangles (NFTs) are associated with neuronal loss and correlate with cognitive impairment in Alzheimer disease, but how NFTs relate to neuronal death is not clear. We studied cell death in Tg4510 mice that reversibly express P301L mutant human tau and accumulate NFTs using in vivo multiphoton imaging of neurofibrillary pathology, propidium iodide (PI) incorporation into cells, caspase activation, and DNA labeling. We first observed that in live mice, a minority of neurons were labeled with the caspase probe or with PI fluorescence. These markers of cell stress were localized in the same cells and appeared specifically within NFT-bearing neurons. Contrary to expectations, the PI-stained neurons did not die during a day of observation; the presence of Hoechst-positive nuclei in them on the subsequent day indicated that the NFT-associated membrane disruption, as suggested by PI staining, and caspase activation do not lead to immediate death of neurons in this tauopathy model. This unique combination of in vivo multiphoton imaging with markers of cell death and pathological alteration is a powerful tool for investigating neuronal damage associated with neurofibrillary pathology.

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  • NFT-containing neurons can survive for decades, indicating that NFTs are neither obligatory nor sufficient to induce neuronal dysfunction and toxicity.

    “NFT‐containing neurons can survive for decades, 7 , 8 indicating that NFTs are neither obligatory nor sufficient to induce neuronal dysfunction and toxicity.”
  • Mitochondrial abnormalities, synaptic loss and dysfunction, altered axonal transport, and activation of cell death pathways have been implicated as consequences of tau mislocalization or oligomerization.

    “Mitochondrial abnormalities, synaptic loss and dysfunction, altered axonal transport, and activation of cell death pathways (including caspase activation and inflammatory responses) have all been directly or indirectly implicated as consequences of tau mislocalization or oligomerization (20, 40, 43–52).”

    From All the Tau We Cannot See (2023) · cites this paper as [44]

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Authors
de Calignon, A., Spires-Jones, T. L., Pitstick, R., Carlson, G. A., & Hyman, B. T.
Affiliations
Harvard University (US)
Corresponding author
Hyman, Bradley T.
Venue
Journal of Neuropathology & Experimental Neurology
Published
2009-07
Volume
68
Issue
7
Pages
757-761
ISSN
  • 0022-3069 (ISSN-L)
  • 1554-6578
OpenAlex
W2095860147
Cited by
81
References
15
Citations by year
2026: 1 · 2025: 6 · 2024: 3 · 2023: 5 · 2022: 7 · 2021: 5 · 2020: 1 · 2019: 2 · 2018: 4 · 2017: 3 · 2016: 5 · 2015: 4 · 2014: 4 · 2013: 8 · 2012: 6
FWCI
5.08
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuropathology & Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
Funders
  • National Institutes of Health (AG08487)
  • National Institute on Aging (AG-08487, R01AG026249, R01AG008487, AG026249, P50AG005134, K99AG033670, P30AG062421)
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
neurofibrillary tangles, tauopathy, neuronal survival, neuronal cell death, P301L tau, membrane integrity disruption, caspase activation, propidium iodide staining, Alzheimer's disease
MeSH terms
Animals, Brain, Cell Membrane, Cell Survival, Disease Models, Animal, Fluorescence, Mice, Transgenic, Nerve Degeneration, Neurons, Propidium, Stress, Physiological, Time Factors, Neurofibrillary Tangles, tau Proteins, Cell Death, Caspases, Tauopathies, Microscopy, Fluorescence, Multiphoton, Mice

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