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Brain Res Bull. 2013 Jan;90:127-31. doi: 10.1016/j.brainresbull.2012.10.007. Epub 2012 Nov 2.

Deletion in exon 5 of the SNCA gene and exposure to rotenone leads to oligomerization of α-synuclein and toxicity to PC12 cells.

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State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China.


α-Synuclein (α-syn) is a presynaptic protein that is widely implicated in the pathophysiology of Parkinson's disease (PD). Recently, four α-syn isoforms that are produced by alternative splicing have been described, they are α-syn140, α-syn126, α-syn112, and α-syn98. The stable cell lines which expressed the four α-syn isoforms respectively were obtained, and the aggregation formation of these α-syn isoforms and their associated toxicity to PC12 cell were investigated. The results of this study indicate that over-expression of α-syn isoforms alone in dopaminergic cells have no effect on the formation of α-syn oligomeric species and cell viabilities. When exposed to rotenone, these cell lines which over expressed exon 5-lacking form of α-syn isoforms showed the formation of oligomeric species and toxicity to PC12 cells.

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