Cited by 702Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchAmyotrophic Lateral Sclerosis Research

Age-dependent neurofibrillary tangle formation, neuron loss, and memory impairment in a mouse model of human tauopathy (P301L)

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Ramsden, Martin, Kotilinek, Linda, Forster, Colleen, Paulson, Jennifer, McGowan, Eileen, SantaCruz, Karen, Guimaraes, Aaron, Yue, Mei +4 more·2005·The Journal of Neuroscience

Abstract

Here, we describe the generation of a novel transgenic mouse model of human tauopathy. The rTg(tau P301L )4510 mouse expresses the P301L mutation in tau (4R0N) associated with frontotemporal dementia and parkinsonism linked to chromosome 17. Transgene expression was driven by a forebrain-specific Ca 2+ calmodulin kinase II promoter system resulting in high levels of expression in the hippocampus and neocortex. Importantly, transgene expression in this model is induced via the tetracycline-operon responsive element and is suppressed after treatment with doxycycline. Continued transgene expression in rTg(tau P301L )4510 mice results in age-dependent development of many salient characteristics of hereditary human dementia. From an early age, immunohistochemical studies demonstrated abnormal biochemical processing of tau and the presence of pathological conformation- and phosphorylation-dependent epitopes. Neurofibrillary tangle (NFT) pathology was first observed in the neocortex and progressed into the hippocampus and limbic structures with increasing age. Consistent with the formation of NFTs, immunoblots indicated an age-dependent transition of accumulating tau species from Sarkosyl soluble 55 kDa to insoluble hyperphosphorylated 64 kDa. Ultrastructural analysis revealed the presence of straight tau filaments. Furthermore, the effects of tau P301L expression on spatial reference memory were longitudinally tested using the Morris water maze. Compared with nontransgenic age-matched control littermates, rTg(tau P301L )4510 mice developed significant cognitive impairments from 4 months of age. Memory deficits were accompanied by gross forebrain atrophy and a prominent loss of neurons, most strikingly in hippocampal subdivision CA1. Collectively, these data describe a novel transgenic mouse that closely mimics human tauopathy and may represent an important model for the future study of tau-related neurodegenerative disease.

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Crossref · 10.1523/jneurosci.3279-05.2005

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  • In Tg4510 MAPT transgenics evaluated at 4 and 6 months, memory task impairment and neurodegenerative pathology correspond to sequential activation of neuronal and microglial expression patterns.

    “in Tg4510 MAPT transgenics evaluated at 4 and 6 months, respectively, memory task impairment and neurodegenerative pathology correspond to sequential activation of neuronal and microglial expression patterns (Blackmore et al., 2017; Ramsden et al., 2005).”

    From Meta-Analysis of the Alzheimer’s Disease Human Brain Transcriptome and Functional Dissection in Mouse Models (2020) · cites this paper as Ramsden et al., 2005

    The Discussion reports significant spatial-memory deficits from 4.5 months, and the age-dependent neurodegeneration section reports significantly lower brain weights from 5 months in rTg(tau P301L)4510 mice. The paper does not establish that these changes correspond to sequential activation of neuronal and microglial expression patterns; that part of the jointly cited sentence is not supported by this source. (LLM, conf=0.88)

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  • The general pattern of p-tau accumulation in PS19 mice matched recent reports of brain-wide p-tau accumulation in the P301L tauopathy model.

    “The general pattern of p-tau accumulation matched recent reports of brain-wide p-tau accumulation in the P301L tauopathy model (Ramsden et al., 2005; Detrez et al., 2019).”

    From Spontaneous pathology in PS19 tauopathy mice progresses via brain networks (2025) · cites this paper as Ramsden et al., 2005

    The ‘Pathological tau conformation and phosphorylation’ section reports age-dependent accumulation of phosphorylated tau in the cortex and hippocampus of rTg(tauP301L)4510 mice. Figure 1 and the Discussion describe expression as forebrain-restricted, so the paper supports accumulation across those regions but not the claim of brain-wide accumulation. (LLM, conf=0.85)

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  • Mouse models over-expressing WT or mutant tau exhibit progressive neurodegeneration.

    “These models also exhibit progressive neurodegeneration, which is consistent with observations in humans that cognitive loss is more closely associated with tau pathology than Aβ pathology (Lewis et al., 2000; Ramsden et al., 2005; Polydoro et al., 2009).”

    From β-amyloid accumulation enhances microtubule associated protein tau pathology in an APPNL-G-F/MAPTP301S mouse model of Alzheimer’s disease (2024) · cites this paper as Ramsden et al., 2005

    The Discussion (pp. 10637–10647; passage page unspecified) describes progressive neurodegeneration and substantial neuron loss in the authors’ P301L tau mice. It also mentions cell death in a non-mutant human-tau model, but cautions that most earlier mutant-tau models did not exhibit or report brain neuron loss. The broad claim about mouse models overexpressing either form therefore goes beyond what this paper establishes. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • The rTg4510 mouse model specifically expresses tau in the forebrain without amyloid plaques.

    “A mouse model of tauopathy (rTg4510) has been developed that specifically expresses tau in the forebrain but without amyloid plaques”

    From In vivo imaging of tau pathology using multi-parametric quantitative MRI (2015) · cites this paper as Ramsden et al., 2005

    The Generation of transgenic mice section describes rTg4510 as a mutant human tau model and reports that transgenic tau expression was primarily restricted to the forebrain, especially the hippocampus and cortex (page not available). The passages searched for amyloid plaques do not report whether plaques were absent in these mice, so that part of the claim is not established by our copy. (LLM, conf=0.83)

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  • From 2.5 months onward, phosphorylated tau protein and neuronal loss can be detected in the forebrain of rTg4510 mice.

    “From 2.5 months onward, phosphorylated tau protein and neuronal loss can be detected in the forebrain of these mice (14,34,35).”

    From CREB-activity and nmnat2 transcription are down-regulated prior to neurodegeneration, while NMNAT2 over-expression is neuroprotective, in a mouse model of human tauopathy (2012) · cites this paper as [34]

    The Figure 2 caption reports phosphorylated-tau labeling in hippocampal neurons at 2.5 months. The age-dependent neurodegeneration section reports marked neuronal loss in 10-month-old mice, while the Discussion cites neuron counts at 5.5 months; neither establishes detectable neuronal loss from 2.5 months onward. Page numbers are unavailable in our copy. (LLM, conf=0.89)

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Authors
Ramsden, M., Kotilinek, L., Forster, C., Paulson, J., McGowan, E., SantaCruz, K., Guimaraes, A., Yue, M., Lewis, J., Carlson, G., Hutton, M., & Ashe, K. H.
Affiliations
  • University of Minnesota (US)
  • Mayo Clinic (US)
  • McLaughlin Research Institute (US)
Venue
The Journal of Neuroscience
Published
2005-11-16
Volume
25
Issue
46
Pages
10637-10647
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2107804537
Cited by
702
References
7
Citations by year
2026: 18 · 2025: 34 · 2024: 46 · 2023: 61 · 2022: 49 · 2021: 46 · 2020: 73 · 2019: 26 · 2018: 26 · 2017: 35 · 2016: 28 · 2015: 29 · 2014: 38 · 2013: 30 · 2012: 28
FWCI
8.83
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, public-domain)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ns046355-03)
  • U.S. Public Health Service (R01-026252)
  • National Institute on Aging (P01-AG15343)
  • National Institute of Neurological Disorders and Stroke (R01-NS046355, R01-NS46355)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
Keywords
tauopathy, transgenic mouse model, neurofibrillary tangles, tau hyperphosphorylation, tau filaments, frontotemporal dementia
MeSH terms
Aging, Animals, Cell Count, Disease Models, Animal, Humans, Memory Disorders, Mice, Transgenic, Nerve Degeneration, Neurofibrillary Tangles, Tauopathies, Mice

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