Abstract
Glycosaminoglycans (GAGs), belonging to a family of negatively charged linear polysaccharides, have been found in the cores of amyloid inclusions such as Lewy bodies, which are the central pathological features in Parkinson's disease (PD), a neurodegenerative disease. Lewy bodies/neurites are mostly composed of α-synuclein protein (α-syn) aggregates. Recent studies have shown that α-syn aggregates can propagate via neurons in a prion-like fashion by seeding the endogenous cellular α-syn. Various GAGs, especially heparan sulfate (HS), have been shown to be very critical in the aggregation of α-syn. HS chains of heparan sulfate proteoglycans (HSPGs) mediate the uptake of α-syn aggregates and help seed intracellular accumulation and further neuronal spread. Methods that inhibit the binding of these aggregates to HSPG have been shown to decrease the aggregate uptake and propagation. Here, we describe a cell-based assay to screen inhibitors of HS and α-syn interactions.
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