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Activity-Dependent Tau Protein Translocation to Excitatory Synapse Is Disrupted by Exposure to Amyloid-Beta Oligomers
Open accessAbstract
Tau is a microtubule-associated protein well known for its stabilization of microtubules in axons. Recently, it has emerged that tau participates in synaptic function as part of the molecular pathway leading to amyloid-beta (Aβ)-driven synaptotoxicity in the context of Alzheimer's disease. Here, we report the implication of tau in the profound functional synaptic modification associated with synaptic plasticity. By exposing murine cultured cortical neurons to a pharmacological synaptic activation, we induced translocation of endogenous tau from the dendritic to the postsynaptic compartment. We observed similar tau translocation to the postsynaptic fraction in acute hippocampal slices subjected to long-term potentiation. When we performed live confocal microscopy on cortical neurons transfected with human-tau-GFP, we visualized an activity-dependent accumulation of tau in the postsynaptic density. Coprecipitation using phalloidin revealed that tau interacts with the most predominant cytoskeletal component present, filamentous actin. Finally, when we exposed cortical cultures to 100 n m human synthetic Aβ oligomers (Aβo's) for 15 min, we induced mislocalization of tau into the spines under resting conditions and abrogated subsequent activity-dependent synaptic tau translocation. These changes in synaptic tau dynamics may rely on a difference between physiological and pathological phosphorylation of tau. Together, these results suggest that intense synaptic activity drives tau to the postsynaptic density of excitatory synapses and that Aβo-driven tau translocation to the spine deserves further investigation as a key event toward synaptotoxicity in neurodegenerative diseases.
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“Aβ exposure modifies Tau’s phosphorylation status and prevents it from relocalizing away from the post-synaptic domain following synaptic activation [29].”
From The new genetic landscape of Alzheimer’s disease: from amyloid cascade to genetically driven synaptic failure hypothesis? (2019) · cites this paper as [29]
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“In vivo, tau co-localizes with actin in differentiating PC12 cells22 and in the post-synaptic compartments of mature neurons23.”
From Tau co-organizes dynamic microtubule and actin networks (2015) · cites this paper as [23]
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“Recent studies demonstrate that tau is also present in dendrites and postsynaptic compartments [128–130].”
From Molecular and cellular mechanisms underlying the pathogenesis of Alzheimer’s disease (2020) · cites this paper as [129]
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“Dendritic tau may also play a role in regulating synaptic plasticity, as synaptic activity can recruit tau to the postsynaptic densities, where tau deletion in various mouse models show deficits either in LTP or LTD [129, 131, 132].”
From Molecular and cellular mechanisms underlying the pathogenesis of Alzheimer’s disease (2020) · cites this paper as [129]
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Metadata
- Authors
- Frandemiche, M. L., De Seranno, S., Rush, T., Borel, E., Elie, A., Arnal, I., Lanté, F., & Buisson, A.
- Affiliations
- Inserm (FR)
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 2014-04-23
- Volume
- 34
- Issue
- 17
- Pages
- 6084-6097
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6608293
- OpenAlex
- W2006955217
- Cited by
- 272
- References
- 48
- Citations by year
- 2026: 11 · 2025: 21 · 2024: 27 · 2023: 9 · 2022: 18 · 2021: 30 · 2020: 29 · 2019: 26 · 2018: 32 · 2017: 23 · 2016: 25 · 2015: 18 · 2014: 3
- FWCI
- 15.34
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Fondation Neurodis
- Agence Nationale de la Recherche
- Institut National de la Santé et de la Recherche Médicale
- Centre National de la Recherche Scientifique
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › 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
- tau protein, amyloid-beta oligomers, synaptic plasticity, postsynaptic density, excitatory synapses, synaptotoxicity, Alzheimer's disease, long-term potentiation, actin, tau phosphorylation, dendritic spines, cortical neurons, hippocampus
- MeSH terms
- Animals, Cells, Cultured, Cerebral Cortex, Dendrites, Neurons, Peptide Fragments, Phosphorylation, Synapses, Amyloid beta-Peptides, tau Proteins, Protein Transport, Mice
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