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Updated: Jul 3, 2025

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag
Published on: December 14, 2017
VPS13C regulates phospho-Rab10-mediated lysosomal function in human dopaminergic neurons
Leonie F Schrӧder1,2, Wesley Peng1, Ge Gao1
1Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
Loss of VPS13C disrupts lysosomal function in human dopaminergic neurons, impacting cellular health. This dysfunction, involving Rab10, contributes to Parkinson's disease pathogenesis.
Area of Science:
- Neuroscience
- Cell Biology
- Genetics
Background:
- Loss-of-function mutations in VPS13C are associated with early-onset Parkinson's disease (PD).
- Previous studies on VPS13C were limited to non-neuronal cells, leaving its role in human dopaminergic neurons unclear.
Purpose of the Study:
- To investigate the neuronal function of VPS13C in human dopaminergic neurons.
- To elucidate the role of VPS13C in lysosomal dynamics and homeostasis in the context of Parkinson's disease.
Main Methods:
- Utilized live-cell microscopy in human induced pluripotent stem cell (iPSC)-derived dopaminergic neurons.
- Analyzed lysosomal morphology, dynamics, motility, distribution, hydrolytic activity, and acidification.
- Identified and characterized VPS13C interactors, specifically focusing on Rab10 phosphorylation.
Main Results:
- Loss of VPS13C impaired lysosomal morphology and dynamics, increasing inter-lysosomal contacts.
- Defective lysosomal hydrolytic activity and acidification were observed in VPS13C-deficient neurons.
- VPS13C interacts with Rab10 on lysosomes in a phospho-dependent manner, and its loss reduced the phospho-Rab10-mediated lysosomal stress response.
Conclusions:
- VPS13C plays a critical role in maintaining lysosomal homeostasis in human dopaminergic neurons.
- Disruptions in the Rab10-mediated lysosomal stress response due to VPS13C deficiency contribute to the pathogenesis of VPS13C-linked Parkinson's disease.
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