Cited by 167Neuroscience and Neuropharmacology ResearchAlzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration Mechanisms

Tau exacerbates excitotoxic brain damage in an animal model of stroke

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Bi, Mian, Gladbach, Amadeus, van Eersel, Janet, Ittner, Arne, Przybyla, Magdalena, van Hummel, Annika, Chua, Sook Wern, van der Hoven, Julia +11 more·2017·Nature Communications

Abstract

Neuronal excitotoxicity induced by aberrant excitation of glutamatergic receptors contributes to brain damage in stroke. Here we show that tau-deficient (tau −/− ) mice are profoundly protected from excitotoxic brain damage and neurological deficits following experimental stroke, using a middle cerebral artery occlusion with reperfusion model. Mechanistically, we show that this protection is due to site-specific inhibition of glutamate-induced and Ras/ERK-mediated toxicity by accumulation of Ras-inhibiting SynGAP1, which resides in a post-synaptic complex with tau. Accordingly, reducing SynGAP1 levels in tau −/− mice abolished the protection from pharmacologically induced excitotoxicity and middle cerebral artery occlusion-induced brain damage. Conversely, over-expression of SynGAP1 prevented excitotoxic ERK activation in wild-type neurons. Our findings suggest that tau mediates excitotoxic Ras/ERK signaling by controlling post-synaptic compartmentalization of SynGAP1.

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  • These same mechanisms may render neurons vulnerable to excitotoxicity, as tau-dependent Fyn-PSD-95-NMDAR coupling amplifies glutamate receptor activation under pathological conditions.

    “However, these same mechanisms may render neurons vulnerable to excitotoxicity, as tau-dependent Fyn-PSD-95-NMDAR coupling amplifies glutamate receptor activation under pathological conditions [52, 124].”

    From Tau Ablation Rewires Brain Cell Programs in Health and Restores Function in Disease (2026) · cites this paper as [124]

    The Results (‘Tau−/− mice lack excitotoxic Ras/ERK activation’; page unavailable) show that tau promotes excitotoxic signaling downstream of NMDA receptors, and the NMDA-infusion results show greater damage in mice with tau. The Discussion links tau loss to reduced synaptic Fyn, but the paper does not establish that Fyn–PSD-95–NMDAR coupling amplifies glutamate receptor activation; its demonstrated mechanism centers on SynGAP1 and downstream Ras/ERK signaling. (LLM, conf=0.86)

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Authors
Bi, M., Gladbach, A., van Eersel, J., Ittner, A., Przybyla, M., van Hummel, A., Chua, S. W., van der Hoven, J., Lee, W. S., Müller, J., Parmar, J., Jonquieres, G. V., Stefen, H., Guccione, E., Fath, T., Housley, G. D., Klugmann, M., Ke, Y. D., & Ittner, L. M.
Affiliations
  • UNSW Sydney (AU)
  • Agency for Science, Technology and Research (SG)
Corresponding author
Ittner, Lars M.
Venue
Nature Communications
Published
2017-09-07
Volume
8
Issue
1
Pages
473-473
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2751298713
Cited by
167
References
89
Citations by year
2026: 10 · 2025: 14 · 2024: 20 · 2023: 13 · 2022: 22 · 2021: 25 · 2020: 27 · 2019: 22 · 2018: 13 · 2017: 1
FWCI
8.43
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • National University of Singapore (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • University of New South Wales
  • Medical Research Council
  • Australian Research Council
  • National Health and Medical Research Council
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
tau protein, excitotoxicity, stroke, SYNGAP1, Ras/ERK signaling, glutamate receptors, middle cerebral artery occlusion, neuroprotection
MeSH terms
Animals, Brain Injuries, Cells, Cultured, Disease Models, Animal, Humans, Male, Mice, Inbred C57BL, Neurons, Synaptosomes, Signal Transduction, tau Proteins, Mice, Knockout, Infarction, Middle Cerebral Artery, Stroke, ras GTPase-Activating Proteins, Gene Expression Profiling

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