Cited by 402Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Region-specific Dissociation of Neuronal Loss and Neurofibrillary Pathology in a Mouse Model of Tauopathy

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Spires, Tara L., Orne, Jennifer D., SantaCruz, Karen, Pitstick, Rose, Carlson, George A., Ashe, Karen H., Hyman, Bradley T.·2006·The American Journal of Pathology

Abstract

Neurofibrillary tangles form in a specific spatial and temporal pattern in Alzheimer's disease. Although tangle formation correlates with dementia and neuronal loss, it remains unknown whether neurofibrillary pathology causes cell death. Recently, a mouse model of tauopathy was developed that reversibly expresses human tau with the dementia-associated P301L mutation. This model (rTg4510) exhibits progressive behavioral deficits that are ameliorated with transgene suppression. Using quantitative analysis of PHF1 immunostaining and neuronal counts, we estimated neuron number and accumulation of neurofibrillary pathology in five brain regions. Accumulation of PHF1-positive tau in neurons appeared between 2.5 and 7 months of age in a region-specific manner and increased with age. Neuron loss was dramatic and region-specific in these mice, reaching over 80% loss in hippocampal area CA1 and dentate gyrus by 8.5 months. We observed regional dissociation of neuronal loss and accumulation of neurofibrillary pathology, because there was loss of neurons before neurofibrillary lesions appeared in the dentate gyrus and, conversely, neurofibrillary pathology appeared without major cell loss in the striatum. Finally, suppressing the transgene prevented further neuronal loss without removing or preventing additional accumulation of neurofibrillary pathology. Together, these results imply that neurofibrillary tangles do not necessarily lead to neuronal death.

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  1. Kordower JH, Chu Y, Stebbins GT, DeKosky ST, Cochran EJ, Bennett D, Mufson EJ: Loss and atrophy of layer II entorhinal cortex neurons in elderly people with mild cognitive impairment. Ann Neurol 2001, 49:202-213
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Authors
Spires, T. L., Orne, J. D., SantaCruz, K., Pitstick, R., Carlson, G. A., Ashe, K. H., & Hyman, B. T.
Affiliations
  • Massachusetts General Hospital (US)
  • University of Minnesota (US)
  • McLaughlin Research Institute (US)
Corresponding author
Hyman, Bradley T.
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2006-05
Volume
168
Issue
5
Pages
1598-1607
ISSN
0002-9440 (ISSN-L)
OpenAlex
W1965709917
Cited by
401
References
48
Citations by year
2026: 8 · 2025: 12 · 2024: 16 · 2023: 25 · 2022: 13 · 2021: 12 · 2020: 33 · 2019: 18 · 2018: 25 · 2017: 24 · 2016: 20 · 2015: 20 · 2014: 26 · 2013: 30 · 2012: 25
FWCI
11.74
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (AG08487)
  • National Institute on Aging (AG-08487, R01AG026249, AG00277, R01AG008487, AG26249, T32AG000277, P50AG005134)
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
tauopathy, neurofibrillary tangles, neuronal loss, P301L tau mutation, PHF1, hippocampus, dentate gyrus, striatum, Alzheimer's disease, neurodegeneration
MeSH terms
Aging, Animals, Brain, Disease Models, Animal, DNA-Binding Proteins, Membrane Proteins, Mice, Transgenic, Microtubule-Associated Proteins, Neurofibrils, Neurons, Nuclear Proteins, Time Factors, Transcription Factors, Biomarkers, Neurofibrillary Tangles, tau Proteins, Gene Silencing, Tauopathies, Mice, t-Complex Genome Region, Polycomb-Group Proteins

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