Cited by 35Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Neuronal degeneration, synaptic defects, and behavioral abnormalities in tau45-230 transgenic mice

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Lang, A.E., Riherd Methner, D.N., Ferreira, A.·2014·Neuroscience

Abstract

The complement of mechanisms underlying tau pathology in neurodegenerative disorders has yet to be elucidated. Among these mechanisms, abnormal tau phosphorylation has received the most attention because neurofibrillary tangles present in Alzheimer's disease (AD) and related disorders known as tauopathies are composed of hyperphosphorylated forms of this microtubule-associated protein. More recently, we showed that calpain-mediated cleavage leading to the generation of the 17kDa tau₄₅₋₂₃₀ fragment is a conserved mechanism in these diseases. To obtain insights into the role of this fragment in neurodegeneration, we generated transgenic mice that express tau₄₅₋₂₃₀ and characterized their phenotype. Our results showed a significant increase in cell death in the hippocampal pyramidal cell layer of transgenic tau₄₅₋₂₃₀ mice when compared to wild-type controls. In addition, significant synapse loss was detected as early as six months after birth in transgenic hippocampal neurons. These synaptic changes were accompanied by alterations in the expression of the N-methyl-d-aspartate glutamate (NMDA) receptor subunits. Furthermore, functional abnormalities were detected in the transgenic mice using Morris Water Maze and fear conditioning tests. These results suggest that the accumulation of tau₄₅₋₂₃₀ is responsible, at least in part, for neuronal degeneration and some behavioral changes in AD and other tauopathies. Collectively, these data provide the first direct evidence of the toxic effects of a tau fragment biologically produced in the context of these diseases in vertebrate neurons that develop in situ.

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Crossref · 10.1016/j.neuroscience.2014.06.017

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Authors
Lang, A. E., Riherd Methner, D. N., & Ferreira, A.
Affiliations
Northwestern University (US)
Venue
Neuroscience
Publisher
Elsevier BV
Published
2014-09
Volume
275
Pages
322-339
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2078770779
Cited by
35
References
79
Citations by year
2026: 2 · 2024: 1 · 2023: 2 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 4 · 2018: 3 · 2017: 5 · 2016: 4 · 2015: 1 · 2014: 1
FWCI
2.44
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIH (NS39080)
  • Northwestern University
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, Alzheimer's disease, calpain cleavage, neurodegeneration, synaptic loss, hippocampal pyramidal neurons, NMDA receptor subunits, behavioral abnormalities, transgenic mice
MeSH terms
Animals, Behavior, Animal, Disease Models, Animal, Hippocampus, Humans, Immunohistochemistry, Mice, Inbred C57BL, Mice, Transgenic, Nerve Degeneration, Neurons, Synapses, Blotting, Western, tau Proteins, Maze Learning, Reverse Transcriptase Polymerase Chain Reaction, Tauopathies, Mice

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