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Gait Analysis of Age-dependent Motor Impairments in Mice with Neurodegeneration
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Mutation in VPS35 associated with Parkinson's disease impairs WASH complex association and inhibits autophagy

Eszter Zavodszky1, Matthew N J Seaman2, Kevin Moreau3

  • 11] Department of Medical Genetics, Cambridge Institute for Medical Research, Cambridge Biomedical Campus, University of Cambridge, Wellcome Trust/MRC Building, Hills Road, Cambridge CB2 0XY, UK [2].

Nature Communications
|May 14, 2014
PubMed

Insights

The Parkinson's disease-linked VPS35 D620N mutation impairs the WASH complex's endosomal recruitment, disrupting autophagy. This study reveals a new role for the WASH complex in autophagosome formation.

Area of Science:

  • Cell Biology
  • Neuroscience
  • Molecular Biology

Background:

  • Endosomal protein sorting is crucial for cellular function and implicated in neurodegenerative diseases.
  • VPS35, a retromer component, regulates endosome-to-Golgi retrieval and WASH complex recruitment.
  • A specific VPS35 mutation (D620N) is linked to autosomal-dominant Parkinson's disease (PD).

Purpose of the Study:

  • To investigate the functional consequences of the PD-associated VPS35 D620N mutation.
  • To elucidate the role of the WASH complex in VPS35-mediated cellular processes.
  • To explore the link between VPS35, WASH, and autophagy.

Main Methods:

  • Analysis of VPS35 mutant association with the WASH complex.
  • Assessment of WASH complex recruitment to endosomes in cells expressing mutant VPS35.
  • Evaluation of autophagy and ATG9A trafficking in VPS35-mutant or WASH-deficient cells.

Main Results:

  • The PD-associated VPS35 D620N mutant exhibits reduced association with the WASH complex.
  • Mutant VPS35 impairs the recruitment of the WASH complex to endosomes.
  • Impaired autophagy and abnormal ATG9A trafficking were observed in cells with PD-mutant VPS35 or lacking WASH.

Conclusions:

  • The VPS35 D620N mutation disrupts WASH complex recruitment, contributing to Parkinson's disease pathogenesis.
  • The WASH complex plays a novel role in autophagosome formation.
  • Dysfunctional endosomal sorting and autophagy are key features of this PD model.

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