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https://www.selleckchem.com/products/gdc6036.html Recently, the arylsulfatase A (ARSA) variant c.899 T > C (p.L300S) was identified to be segregated with Parkinson's disease (PD) in one family of Japanese descent. And the variant c.1055A > G (p.N352S) of ARSA was reported as a risk reduction factor for PD in a Japanese population. To further investigate the relationship between ARSA and PD, we screened these two loci of the ARSA gene in 407 sporadic PD patients and 471 healthy controls from a Chinese Han population. However, we did not detect the ARSA p.L300S variant in either PD patients or healthy controls. Moreover, in case-control association analysis, the p.N325S variant showed no significant association with PD. Therefore, these results suggested that these ARSA variants may not be common genetic factors for sporadic PD in Chinese Han population.Aging is associated with an increased risk for Parkinson's disease and dementia with Lewy bodies, in which α-synuclein (α-syn) oligomerization plays key pathogenic roles. Here, we show that oligomeric α-syn levels increase with age in the human brain and are accompanied by a decrease in the activity of glucocerebrosidase (GCase), a lysosomal enzyme whose dysfunction is linked to the accumulation of oligomeric α-syn. The inverse relationship between oligomeric α-syn levels and GCase activity was more evident in brain regions susceptible to neurodegeneration (i.e., the striatum and hippocampus) than those that are less vulnerable (i.e., the cerebellum and occipital cortex). GCase could potentially regulate α-syn oligomerization, as demonstrated by the decrease in oligomeric α-syn levels caused by a GCase agonist. In vitro experiments showed that GCase activity was more potently inhibited by oligomeric than monomeric α-syn in the lysosome-enriched fractions isolated from brain tissues and cultured neuronal cells. Alterations in oligomeric α-syns and their association with GCase in aging brains may explain the vulnerabilit

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