VPS35 Mutations and Neurodegenerative Mechanisms in Parkinson's Disease

VPS35 encodes the core of the retromer complex, crucial for endosomal sorting and cargo recycling. The D620N missense variant in VPS35 underlies familial Parkinson’s disease (PD) by disrupting retromer assembly, leading to deficits in endosomal–lysosomal trafficking, autophagy and mitochondrial function. Such disturbances promote α-synuclein aggregation, dopaminergic synapse dysfunction and neuroinflammation. Emerging evidence extends VPS35-linked pathology to visual circuits and identifies interacting kinases and chaperones as therapeutic targets.

Research from Nature Portfolio

In a rod-specific VPS35 deletion model, loss of retromer in photoreceptors led to early synaptic loss, visual deficits and accumulation of Lewy body–like inclusions in late endosomes. VPS35 deficiency sequestered HSC70 and phospho-α-synuclein in endosomal compartments, provoking microglial activation and autofluorescent deposits visible in live imaging, thus revealing non‐motor retinal manifestations of retromer dysfunction.

Seminal work on the D620N mutation showed impaired binding of VPS35 to the WASH complex, reducing actin nucleation on endosomes and mislocalising the autophagy protein ATG9A. These alterations diminished autophagosome formation, directly linking retromer impairment to autophagic failure and suggesting that restoring WASH recruitment can re-establish proteostatic balance in PD models.

VPS35 Mutations and Neurodegenerative Mechanisms in Parkinson's Disease publication trend

The graph below shows the total number of articles in vps35 mutations and neurodegenerative mechanisms in parkinson's disease across all publications each year (not limited to Nature Index journals).

Technical terms

Retromer complex: A multisubunit assembly that recognises specific membrane proteins and mediates their retrieval from endosomes to the trans-Golgi network or plasma membrane.

D620N mutation: A pathogenic missense variant of VPS35 in which aspartate at position 620 is replaced by asparagine, linked to autosomal‐dominant PD.

WASH complex: An actin-nucleating factor recruited by retromer to endosomal membranes, facilitating membrane tubulation and cargo sorting through branched filament formation.

Autophagy: A lysosome-mediated degradation pathway comprising conventional (ATG5-dependent) and alternative (Rab9-dependent) routes for removal of damaged proteins and organelles.

LRRK2 kinase: A serine/threonine kinase mutated in PD that phosphorylates Rab GTPases, thereby modulating endo-lysosomal trafficking and interacting functionally with VPS35.

References

1. Mutant mice with rod-specific VPS35 deletion exhibit retinal α-synuclein pathology-associated degeneration. Nature Communications (2024).
2. Mutation in VPS35 associated with Parkinson’s disease impairs WASH complex association and inhibits autophagy. Nature Communications (2014).
3. Inhibition of LRRK2 kinase activity rescues deficits in striatal dopamine physiology in VPS35 p.D620N knock-in mice. npj Parkinson's Disease (2023).
4. The impact of VPS35 D620N mutation on alternative autophagy and its reversal by estrogen in Parkinson's disease. Cellular and Molecular Life Sciences (2024).
5. Dysregulation of SNX1-retromer axis in pharmacogenetic models of Parkinson’s disease. Cell Death Discovery (2024).
6. VPS35 and retromer dysfunction in Parkinson's disease. Philosophical Transactions of the Royal Society B Biological Sciences (2024).