Rabbit Anti-Human VPS35 Polyclonal antibody

Parkinson's disease (PD) characterized with slow continuous degeneration of dopaminergic neurons in the substantia nigra is one of the most common neurodegenerative diseases, but its etiology and pathogenesis are not fully understood. The pathogenesis of PD involves the impairment of lysosomal autophagy, which also contributes to lysosomal storage disorders (LSDs). In this work, the expression of genes related to lysosomal autophagy: Hspa8, Lamp2, Tfam, Slc18a2, and Vps35, was analyzed in the brain tissues of mice with the earliest stage of MPTP-induced PD. The detected decrease in Hspa8 and Lamp2 mRNA levels suggests that dysfunction of lysosomal autophagy may be involved in the earliest stages of PD pathogenesis. A decrease in the rate of lysosomal autophagy may affect the accumulation of damaged proteins and the formation of protein inclusions in PD. Genes related to the lysosome function may be involved in development of both LSD and PD at the earliest stages of these pathophysiological processes.

Numerous genes and molecular pathways are implicated in neurodegenerative proteinopathies, but their inter-relationships are poorly understood. We systematically mapped molecular pathways underlying the toxicity of alpha-synuclein (alpha-syn), a protein central to Parkinson's disease. Genome-wide screens in yeast identified 332 genes that impact alpha-syn toxicity. To "humanize'' this molecular network, we developed a computational method, Transpose Net. This integrates a Steiner prize-collecting approach with homology assignment through sequence, structure, and interaction topology. TransposeNet linked a-syn to multiple parkinsonism genes and druggable targets through perturbed protein trafficking and ER quality control as well as mRNA metabolism and translation. A calcium signaling hub linked these processes to perturbed mitochondrial quality control and function, metal ion transport, transcriptional regulation, and signal transduction. Parkinsonism gene interaction profiles spatially opposed in the network (ATP13A2/PARK9 and VPS35/PARK17) were highly distinct, and network relationships for specific genes (LRRK2/PARK8, ATXN2, and EIF4G1/PARK18) were confirmed in patient induced pluripotent stem cell (iPSC)-derived neurons. This cross-species platform connected diverse neurodegenerative genes to proteinopathy through specific mechanisms and may facilitate patient stratification for targeted therapy.