Neurosci Lett. 2000 Jun 16;287(1):65-7.

Full length alpha-synuclein is present in cerebrospinal fluid from Parkinson's disease and normal subjects.

Borghi R, Marchese R, Negro A, Marinelli L, Forloni G, Zaccheo D, Abbruzzese G, Tabaton M.

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Institute of Human Anatomy, Department of Experimental Medicine, University of Genova, via De Toni 14, 16132, Genova, Italy.

Abstract

Several clues suggest that alpha-synuclein, a presynaptic protein, plays a central role in the pathogenesis of idiopathic Parkinson's disease (PD). To search a peripheral marker of PD, we analyzed presence and amount of alpha-synuclein in CSF from 12 PD patients and 10 neurologically normal subjects. The protein was extracted from CSF samples through immunoprecipitation and immunoblotting with different specific anti-alpha-synuclein antibodies. We identified a 19 kDa band that corresponds to monomeric alpha-synuclein, given its comigration with homologue human recombinant peptide as well as with the protein extracted from cerebral cortex of normal subjects. The amount of CSF 19 kDa alpha-synuclein did not significantly vary in PD and normal cases. These findings have two implications: (a) full length alpha-synuclein is released by neurons in the extracellular space; (b) alpha-synuclein does not appear a peripheral marker of PD pathology.

PMID:: 10841992; [PubMed - indexed for MEDLINE]

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