Cited by 33Alzheimer's disease research and treatmentsNeurobiology and Insect Physiology ResearchAmyotrophic Lateral Sclerosis Research

Temporally distinct phosphorylations differentiate Tau-dependent learning deficits and premature mortality in Drosophila

Papanikolopoulou, Katerina, Skoulakis, Efthimios M.C.·2015·Human Molecular Genetics

Abstract

Abnormally phosphorylated Tau protein, the major component of neurofibrillary tangles, is critical in the pathogenesis of Alzheimer's disease and related Tauopathies. We used Drosophila to examine the role of key disease-associated phosphorylation sites on Tau-mediated neurotoxicity. We present evidence that the late-appearing phosphorylation on Ser(238) rather than hyperphosphorylation per se is essential for Tau toxicity underlying premature mortality in adult flies. This site is also occupied at the time of neurodegeneration onset in a mouse Tauopathy model and in damaged brain areas of confirmed Tauopathy patients, suggesting a similar critical role on Tau toxicity in humans. In contrast, occupation of Ser(262) is necessary for Tau-dependent learning deficits in adult Drosophila. Significantly, occupation of Ser(262) precedes and is required for Ser(238) phosphorylation, and these temporally distinct phosphorylations likely reflect conformational changes. Because sequential occupation of Ser(262) and Ser(238) is required for the progression from Tau-mediated learning deficits to premature mortality in Drosophila, they may also play similar roles in the escalating symptom severity in Tauopathy patients, congruent with their presence in damaged regions of their brains.

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Crossref · 10.1093/hmg/ddu726

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Authors
Papanikolopoulou, K., & Skoulakis, E. M. C.
Affiliations
Alexander Fleming Biomedical Sciences Research Center (GR)
Corresponding author
  • Papanikolopoulou, Katerina
  • Skoulakis, Efthimios M.C.
Venue
Human Molecular Genetics
Published
2014-12-18
Volume
24
Issue
7
Pages
2065-2077
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2147811302
Cited by
33
References
12
Citations by year
2025: 3 · 2023: 3 · 2022: 5 · 2020: 5 · 2019: 7 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 1
FWCI
1.66
Type
journal article
Language
en
Open access
closed
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
Keywords
tau protein, tau phosphorylation, tauopathy, Alzheimer's disease, neurofibrillary tangles, Drosophila, learning deficits, premature mortality, neurotoxicity, conformational change
MeSH terms
Adult, Aged, Aged, 80 and over, Alzheimer Disease, Animals, Brain, Disease Models, Animal, Female, Humans, Learning, Male, Middle Aged, Phosphorylation, Neurofibrillary Tangles, tau Proteins, Amino Acid Motifs, Mice, Mortality, Premature

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