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Published in: Journal of Neurology 11/2016

01-11-2016 | Original Communication

Cerebrospinal α-synuclein in α-synuclein aggregation disorders: tau/α-synuclein ratio as potential biomarker for dementia with Lewy bodies

Authors: Franc Llorens, Matthias Schmitz, Daniela Varges, Niels Kruse, Nadine Gotzmann, Karin Gmitterová, Brit Mollenhauer, Inga Zerr

Published in: Journal of Neurology | Issue 11/2016

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Abstract

Several studies have addressed the utility of cerebrospinal (CSF) α-synuclein levels as a potential biomarker of α-synuclein aggregation disorders. However, its relevance in the differential diagnostic context of neurodegenerative and movement disorders is still a contentious subject. Here, we report total CSF α-synuclein levels in a cohort of clinically diagnosed α-synuclein-related disorders encompassing Parkinson’s disease, Parkinson’s disease dementia, dementia with Lewy bodies and multiple system atrophy in comparison to essential tremor and neurological control cases. α-synuclein levels in α-synuclein-related disorders were significantly lower than in controls (p < 0.001). However, in the differential diagnostic context, only Parkinson’s disease cases presented significant lower α-synuclein levels compared to essential tremor and neurological controls. In cases with clinically diagnosed α-synuclein pathology, CSF α-synuclein levels showed a moderate positive correlation with CSF tau and p-tau, but not with Aβ42 levels. Due to elevated CSF tau levels in dementia with Lewy bodies samples, tau/α-synuclein ratio showed a good clinical accuracy in discriminating controls from dementia with Lewy bodies cases (AUC = 0.8776) compared to single α-synuclein (AUC = 0.7192) and tau (AUC = 0.7739) levels. In conclusion, α-synuclein alone lacks of clinical value as a biomarker of α-synuclein-related disorders, but in combination with total tau, it may improve the diagnosis of dementia with Lewy bodies.
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Metadata
Title
Cerebrospinal α-synuclein in α-synuclein aggregation disorders: tau/α-synuclein ratio as potential biomarker for dementia with Lewy bodies
Authors
Franc Llorens
Matthias Schmitz
Daniela Varges
Niels Kruse
Nadine Gotzmann
Karin Gmitterová
Brit Mollenhauer
Inga Zerr
Publication date
01-11-2016
Publisher
Springer Berlin Heidelberg
Published in
Journal of Neurology / Issue 11/2016
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI
https://doi.org/10.1007/s00415-016-8259-0

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