Cited by 21Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Localization, induction, and cellular effects of tau phosphorylated at threonine 2171

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Rajbanshi, Binita, Guruacharya, Anuj, Mandell, James W., Bloom, George S.·2023·Alzheimer's & Dementia

Abstract

Introduction Tau phosphorylation at T217 is a promising Alzheimer's disease (AD) biomarker, but its functional consequences were unknown. Methods Human brain and cultured mouse neurons were analyzed by immunoblotting and immunofluorescence for total tau, tau pT217 , tau pT181 , tau pT231 , and tau pS396/pS404 . Direct stochastic optical reconstruction microscopy (dSTORM) super resolution microscopy was used to localize tau pT217 in cultured neurons. Enhanced green fluorescent protein (EGFP)-tau was expressed in fibroblasts as wild type and T217E pseudo-phosphorylated tau, and fluorescence recovery after photobleaching (FRAP) reported tau turnover rates on microtubules. Results In the brain, tau pT217 appears in neurons at Braak stages I and II, becomes more prevalent later, and co-localizes partially with other phospho-tau epitopes. In cultured neurons, tau pT217 is increased by extracellular tau oligomers (xcTauOs) and is associated with developing post-synaptic sites. FRAP recovery was fastest for EGFP-tau T217E . Conclusion Tau pT217 increases in the brain as AD progresses and is induced by xcTauOs. Post-synaptic tau pT217 suggests a role for T217 phosphorylation in synapse impairment. T217 phosphorylation reduces tau's affinity for microtubules. Highlights Validation of anti-tau phosphorylated at threonine-217 (tau pT217 ) specificity is essential due to epitope redundancy. tau pT217 increases as Alzheimer's disease progresses and is found throughout diseased neurons. tau…

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Crossref · 10.1002/alz.12892

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Authors
Rajbanshi, B., Guruacharya, A., Mandell, J. W., & Bloom, G. S.
Affiliations
  • University of Virginia (US)
  • Software Carpentry (US)
Corresponding author
Bloom, George S.
Venue
Alzheimer's & Dementia
Publisher
Wiley
Published
2023-01-12
Volume
19
Issue
7
Pages
2874-2887
ISSN
  • 1552-5260 (ISSN-L)
  • 1552-5279
OpenAlex
W4315702465
Cited by
20
References
36
Citations by year
2026: 3 · 2025: 8 · 2024: 7 · 2023: 2
FWCI
3.55
Type
journal article
Language
en
Open access
Locations
  • Alzheimer s & Dementia (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Cure Alzheimer's Fund
  • National Institutes of Health (1s10od025156-01a1)
  • National Institute on Aging (RF1AG051085)
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
tau phosphorylation
MeSH terms
Alzheimer Disease, Animals, Humans, Neurons, Phosphorylation, Threonine, tau Proteins, Mice

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