Cited by 686Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

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Aβ Oligomers Cause Localized Ca 2+ Elevation, Missorting of Endogenous Tau into Dendrites, Tau Phosphorylation, and Destruction of Microtubules and Spines

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Zempel, Hans, Thies, Edda, Mandelkow, Eckhard, Mandelkow, Eva-Maria·2010·The Journal of Neuroscience

Abstract

Aggregation of amyloid-β (Aβ) and Tau protein are hallmarks of Alzheimer's disease (AD), and according to the Aβ-cascade hypothesis, Aβ is considered toxic for neurons and Tau a downstream target of Aβ. We have investigated differentiated primary hippocampal neurons for early localized changes following exposure to Aβ oligomers. Initial events become evident by missorting of endogenous Tau into the somatodendritic compartment, in contrast to axonal sorting in normal neurons. In missorted dendritic regions there is a depletion of spines and local increase in Ca 2+ , and breakdown of microtubules. Tau in these regions shows elevated phosphorylation at certain sites diagnostic of AD-Tau (e.g., epitope of antibody 12E8, whose phosphorylation causes detachment of Tau from microtubules, and AT8 epitope), and local elevation of certain kinase activities (e.g., MARK/par-1, BRSK/SADK, p70S6K, cdk5, but not GSK3β, JNK, MAPK). These local effects occur without global changes in Tau, tubulin, or kinase levels. Somatodendritic missorting occurs not only with Tau, but also with other axonal proteins such as neurofilaments, and correlates with pronounced depletion of microtubules and mitochondria. The Aβ-induced effects on microtubule and mitochondria depletion, Tau missorting, and loss of spines are prevented by taxol, indicating that Aβ-induced microtubule destabilization and corresponding traffic defects are key factors in incipient degeneration. By contrast, the rise in Ca 2+ levels, kinase activities, and Tau phosphorylation cannot be prevented by taxol. Incipient and local changes similar to those of Aβ oligomers can be evoked by cell stressors (e.g., H 2 O 2 , glutamate, serum deprivation), suggesting some common mechanism of signaling.

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Research works printed but not linked: 3

  1. 10.1242/jcs.02745 · DOI · Paper page
  2. 10.1074/jbc.R800036200 · DOI
  3. 10.1186/1750-1326-4-48 · DOI · Paper page

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Metadata

Authors
Zempel, H., Thies, E., Mandelkow, E., & Mandelkow, E.-M.
Affiliations
  • Max Planck Unit for Structural Molecular Biology (DE)
  • German Center for Neurodegenerative Diseases (DE)
Corresponding author
Mandelkow, Eva-Maria
Venue
The Journal of Neuroscience
Published
2010-09-08
Volume
30
Issue
36
Pages
11938-11950
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2041956586
Cited by
686
References
70
Citations by year
2026: 29 · 2025: 33 · 2024: 27 · 2023: 22 · 2022: 30 · 2021: 38 · 2020: 54 · 2019: 46 · 2018: 49 · 2017: 46 · 2016: 50 · 2015: 51 · 2014: 61 · 2013: 54 · 2012: 50
FWCI
32.49
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • DZNE Pub (submittedVersion)
Funders
  • European Commission
  • Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
amyloid-beta oligomers, Alzheimer's disease, tau phosphorylation, dendrites, microtubule destabilization, dendritic spines, neurofilaments, mitochondria, paclitaxel, p70S6K, cyclin-dependent kinase 5, hippocampal neurons, axonal transport, oxidative stress, glutamate, serum deprivation
MeSH terms
Adenosine Triphosphate, Analysis of Variance, Animals, Calcium, Cells, Cultured, Dendrites, Embryo, Mammalian, Hippocampus, L-Lactate Dehydrogenase, Microtubules, Mitochondria, Neurons, Peptide Fragments, Phosphorylation, Protein Kinases, Time Factors, Amyloid beta-Peptides, tau Proteins, Neurofilament Proteins, Rats, Sprague-Dawley, Protein Transport, Microscopy, Electron, Transmission, Dendritic Spines, Rats

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