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Stabilization of dynamic microtubules by mDia1 drives Tau-dependent Aβ1–42 synaptotoxicity

The Journal of cell biology, 2017-10, Vol.216 (10), p.3161-3178 [Peer Reviewed Journal]

2017 Qu et al. 2017 ;ISSN: 0021-9525 ;EISSN: 1540-8140 ;DOI: 10.1083/jcb.201701045 ;PMID: 28877993

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  • Title:
    Stabilization of dynamic microtubules by mDia1 drives Tau-dependent Aβ1–42 synaptotoxicity
  • Author: Qu, Xiaoyi ; Yuan, Feng Ning ; Corona, Carlo ; Pasini, Silvia ; Pero, Maria Elena ; Gundersen, Gregg G. ; Shelanski, Michael L. ; Bartolini, Francesca
  • Is Part Of: The Journal of cell biology, 2017-10, Vol.216 (10), p.3161-3178
  • Description: Oligomeric Amyloid β1–42 (Aβ) plays a crucial synaptotoxic role in Alzheimer’s disease, and hyperphosphorylated tau facilitates Aβ toxicity. The link between Aβ and tau, however, remains controversial. In this study, we find that in hippocampal neurons, Aβ acutely induces tubulin posttranslational modifications (PTMs) and stabilizes dynamic microtubules (MTs) by reducing their catastrophe frequency. Silencing or acute inhibition of the formin mDia1 suppresses these activities and corrects the synaptotoxicity and deficits of axonal transport induced by Aβ. We explored the mechanism of rescue and found that stabilization of dynamic MTs promotes tau-dependent loss of dendritic spines and tau hyperphosphorylation. Collectively, these results uncover a novel role for mDia1 in Aβ-mediated synaptotoxicity and demonstrate that inhibition of MT dynamics and accumulation of PTMs are driving factors for the induction of tau-mediated neuronal damage.
  • Publisher: The Rockefeller University Press
  • Language: English
  • Identifier: ISSN: 0021-9525
    EISSN: 1540-8140
    DOI: 10.1083/jcb.201701045
    PMID: 28877993
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    PubMed Central
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