Cited by 187Alzheimer's disease research and treatmentsAmyotrophic Lateral Sclerosis ResearchNeuroinflammation and Neurodegeneration Mechanisms

Tau Phosphorylation Sites Work in Concert to Promote Neurotoxicity In Vivo

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Steinhilb, Michelle L., Dias-Santagata, Dora, Fulga, Tudor A., Felch, Daniel L., Feany, Mel B.·2007·Molecular Biology of the Cell

Abstract

Tau is a microtubule binding protein implicated in a number of human neurodegenerative disorders, including Alzheimer's disease. Phosphorylation of serine-proline/threonine-proline sites, targeted by proline-directed kinases, coincides temporally with neurodegeneration in the human diseases. Recently, we demonstrated that this unique group of serines and threonines has a critical role in controlling tau toxicity in a Drosophila model of tauopathy. Here, we use a combination of genetic and biochemical approaches to examine these sites individually and to determine which of them is primarily responsible for controlling tau neurotoxicity. Despite the importance placed on individual phosphoepitopes and their contributions to disease pathogenesis, our results indicate that no single phosphorylation residue plays a dominant role in controlling tau toxicity. These findings suggest that serine-proline/threonine-proline sites cooperate to mediate neurodegeneration in vivo.

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  • In vivo fly models of tau toxicity using phosphorylation-resistant tau constructs show equivalent or even increased toxicity when compared with wild-type tau.

    “in vivo fly models of tau toxicity using phosphorylation-resistant tau constructs show equivalent or even increased toxicity when compared with wild-type tau (41,42).”

    From Functional genomic screen and network analysis reveal novel modifiers of tauopathy dissociated from tau phosphorylation (2011) · cites this paper as [41]

    The Results and Discussion report that fly tau constructs resistant to phosphorylation at individual sites, or at a selected group of five sites, caused toxicity similar to wild-type tau. They do not report increased toxicity for those constructs; the Results instead associate greater toxicity with a phosphomimetic construct and markedly reduced toxicity with mutation of all 14 SP/TP sites. Page numbers were not available in our copy. (LLM, conf=0.89)

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  • When either 5 or 11 putative GSK-3β phosphorylation sites were mutated to alanine, tau toxicity either comparable to or more robust than the toxicity induced by wild-type tau was still observed.

    “when either 5 (41) or 11 (42) putative GSK-3β phosphorylation sites were mutated to alanine, tau toxicity either comparable to or more robust than the toxicity induced by wild-type tau was still observed.”
  • Neuronal phenotypes of tau transgenic Drosophila mimic features of human Alzheimer's disease and associated tauopathies.

    “In addition, neuronal phenotypes of tau transgenic Drosophila mimic features of human Alzheimer’s disease and associated tauopathies, including but not limited to aberrant tau phosphorylation13, oxidative stress14, DNA damage15,16, decondensation of constitutive heterochromatin10, synaptic dysfunction17 and activation of the cell cycle in post-mitotic neurons18.”

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Authors
Steinhilb, M. L., Dias-Santagata, D., Fulga, T. A., Felch, D. L., & Feany, M. B.
Affiliations
  • Central Michigan University (US)
  • Brigham and Women's Hospital (US)
  • Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115; and
Venue
Molecular Biology of the Cell
Published
2007-12
Volume
18
Issue
12
Pages
5060-5068
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2165049228
Cited by
187
References
46
Citations by year
2026: 1 · 2025: 3 · 2024: 7 · 2023: 6 · 2022: 5 · 2021: 16 · 2020: 5 · 2019: 13 · 2018: 4 · 2017: 11 · 2016: 7 · 2015: 14 · 2014: 15 · 2013: 14 · 2012: 9
FWCI
8.94
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (AG-19790, P50AG005134, AG 05134, R01AG019790)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
tau phosphorylation, proline-directed kinases, tauopathy, Alzheimer's disease, Drosophila model, neurodegeneration, microtubule-binding protein
MeSH terms
Amino Acids, Animals, Cell Cycle, Drosophila melanogaster, Electrophoresis, Polyacrylamide Gel, Mutation, Neurons, Phosphorylation, Protein Kinases, Signal Transduction, tau Proteins, Phosphatidylinositol 3-Kinases, Drosophila Proteins, Animals, Genetically Modified, TOR Serine-Threonine Kinases

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