Cited by 351Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

The CAMKK2-AMPK Kinase Pathway Mediates the Synaptotoxic Effects of Aβ Oligomers through Tau Phosphorylation

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Mairet-Coello, Georges, Courchet, Julien, Pieraut, Simon, Courchet, Virginie, Maximov, Anton, Polleux, Franck·2013·Neuron

Abstract

Amyloid-β 1-42 (Aβ42) oligomers are synaptotoxic for excitatory cortical and hippocampal neurons and might play a role in early stages of Alzheimer's disease (AD) progression. Recent results suggested that Aβ42 oligomers trigger activation of AMP-activated kinase (AMPK), and its activation is increased in the brain of patients with AD. We show that increased intracellular calcium [Ca²⁺](i) induced by NMDA receptor activation or membrane depolarization activates AMPK in a CAMKK2-dependent manner. CAMKK2 or AMPK overactivation is sufficient to induce dendritic spine loss. Conversely, inhibiting their activity protects hippocampal neurons against synaptotoxic effects of Aβ42 oligomers in vitro and against the loss of dendritic spines observed in the human APP(SWE,IND)-expressing transgenic mouse model in vivo. AMPK phosphorylates Tau on KxGS motif S262, and expression of Tau S262A inhibits the synaptotoxic effects of Aβ42 oligomers. Our results identify a CAMKK2-AMPK-Tau pathway as a critical mediator of the synaptotoxic effects of Aβ42 oligomers.

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Authors
Mairet-Coello, G., Courchet, J., Pieraut, S., Courchet, V., Maximov, A., & Polleux, F.
Affiliations
Scripps Research Institute (US)
Corresponding author
Polleux, Franck
Venue
Neuron
Publisher
Elsevier BV
Published
2013-04
Volume
78
Issue
1
Pages
94-108
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2088148170
Cited by
351
References
91
Citations by year
2026: 19 · 2025: 21 · 2024: 18 · 2023: 20 · 2022: 27 · 2021: 37 · 2020: 24 · 2019: 26 · 2018: 31 · 2017: 36 · 2016: 33 · 2015: 21 · 2014: 26 · 2013: 12
FWCI
21.30
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • HAL (submittedVersion)
  • Columbia Academic Commons (Columbia University)
Funders
  • National Institute on Aging (R01AG031524)
  • National Institute of Mental Health (R01MH085776)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta oligomers, CAMKK2, AMPK, tau phosphorylation, synaptotoxicity, dendritic spine loss, NMDA receptor activation, intracellular calcium, Alzheimer's disease, hippocampal neurons
MeSH terms
AMP-Activated Protein Kinase Kinases, Action Potentials, Animals, Brain, Calcium, Cells, Cultured, Dose-Response Relationship, Drug, Embryo, Mammalian, Enzyme Inhibitors, Humans, Mice, Inbred C57BL, Mice, Transgenic, Mutation, Neurons, Peptide Fragments, Phosphorylation, Platelet-Derived Growth Factor, Protein Kinases, Serine, Transfection, Gene Expression Regulation, Enzymologic, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, tau Proteins, Electroporation, Patch-Clamp Techniques, Glutamic Acid, Dendritic Spines, Green Fluorescent Proteins, Mice, Calcium-Calmodulin-Dependent Protein Kinase Kinase

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