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- W2088585910 abstract "Recent evidence suggests that specific extracellular α-synuclein (α-syn) strains are implicated in the progression of Parkinson's disease (PD) pathology. It is plausible that deregulation in the normal processing of secreted α-syn may be a causative risk factor for PD. To date, the degradation mechanisms involved have received very little attention. Here, we sought to investigate factors that regulate extracellular α-syn levels. We show, for the first time, that cell-secreted α-syn forms are resistant to direct proteolysis by kallikrein-related peptidase 6 (KLK6), an extracellular enzyme known to cleave recombinant α-syn. This differential susceptibility appears to be partially due to the association of secreted α-syn with lipids. We further provide evidence that secreted α-syn can be cleaved by KLK6 indirectly through activation of a secreted metalloprotease, suggestive of the involvement of a proteolytic cascade in the catabolism of secreted α-syn. Our results clearly suggest that physiological modifications affect the biochemical behavior of secreted α-syn and provide novel insights into mechanisms and potential targets for therapeutic interventions.-Ximerakis, M., Pampalakis, G., Roumeliotis, T. I., Sykioti, V.-S., Garbis, S. D., Stefanis, L., Sotiropoulou, G., Vekrellis, K. Resistance of naturally secreted α-synuclein to proteolysis." @default.
- W2088585910 created "2016-06-24" @default.
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- W2088585910 date "2014-04-10" @default.
- W2088585910 modified "2023-09-24" @default.
- W2088585910 title "Resistance of naturally secreted α‐synuclein to proteolysis" @default.
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- W2088585910 doi "https://doi.org/10.1096/fj.13-245852" @default.
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