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EMBO J. 2019 Feb 1;38(3). pii: e99871. doi: 10.15252/embj.201899871. Epub 2019 Jan 10.

Clustering of Tau fibrils impairs the synaptic composition of α3-Na+/K+-ATPase and AMPA receptors.

Author information

1
CEA, Institut François Jacob (MIRcen) and CNRS Laboratory of Neurodegenerative Diseases (UMR9199), Fontenay-aux-Roses, France.
2
Institut de Biologie de l'ENS (IBENS), École Normale Supérieure, INSERM, CNRS, PSL Research University, Paris, France.
3
INSERM, UMR - S 839 Institut du Fer à Moulin (IFM), Sorbonne Université, Paris, France.
4
CHU Lille, INSERM UMR-S 1172 JPArc "Alzheimer & Tauopathies" Universite Lille, Lille, France.
5
Institut de Biologie de l'ENS (IBENS), École Normale Supérieure, INSERM, CNRS, PSL Research University, Paris, France triller@biologie.ens.fr ronald.melki@cnrs.fr.
6
CEA, Institut François Jacob (MIRcen) and CNRS Laboratory of Neurodegenerative Diseases (UMR9199), Fontenay-aux-Roses, France triller@biologie.ens.fr ronald.melki@cnrs.fr.

Abstract

Tau assemblies have prion-like properties: they propagate from one neuron to another and amplify by seeding the aggregation of endogenous Tau. Although key in prion-like propagation, the binding of exogenous Tau assemblies to the plasma membrane of naïve neurons is not understood. We report that fibrillar Tau forms clusters at the plasma membrane following lateral diffusion. We found that the fibrils interact with the Na+/K+-ATPase (NKA) and AMPA receptors. The consequence of the clustering is a reduction in the amount of α3-NKA and an increase in the amount of GluA2-AMPA receptor at synapses. Furthermore, fibrillar Tau destabilizes functional NKA complexes. Tau and α-synuclein aggregates often co-exist in patients' brains. We now show evidences for cross-talk between these pathogenic aggregates with α-synuclein fibrils dramatically enhancing fibrillar Tau clustering and synaptic localization. Our results suggest that fibrillar α-synuclein and Tau cross-talk at the plasma membrane imbalance neuronal homeostasis.

KEYWORDS:

cross‐talk of pathogenic proteins; misfolding disease; protein aggregation and clustering; single‐particle tracking; tauopathies

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