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Published in: Journal of Neural Transmission 2/2009

01-02-2009 | Alzheimer's Disease and Related Disorders - Original Article

Combined CSF tau, p-tau181 and amyloid-β 38/40/42 for diagnosing Alzheimer’s disease

Authors: Volker Welge, Oliver Fiege, Piotr Lewczuk, Brit Mollenhauer, Hermann Esselmann, Hans-Wolfgang Klafki, Stefanie Wolf, Claudia Trenkwalder, Markus Otto, Johannes Kornhuber, Jens Wiltfang, Mirko Bibl

Published in: Journal of Neural Transmission | Issue 2/2009

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Abstract

Cerebrospinal fluid (CSF) concentrations of amyloid-β (Aβ) 1-38, 1-40, 1-42, total-tau and phospho-tau in samples from 156 patients with Alzheimer’s disease (AD) (n = 44), depressive cognitive complainers (DCC, n = 25) and various other forms of non-Alzheimer dementias (NAD, n = 87) were analyzed by electrochemiluminescence and enzyme linked immunosorbent assay, respectively. A significant decrease of CSF Aβ1-42 was the most powerful single marker for differentiation of AD from DCC, yielding accuracies of beyond 85%. Increased p-tau and the ratio Aβ1-42/Aβ1-38 yielded accuracies of beyond 80 and 85%, respectively, to discriminate AD versus NAD. Combining p-tau with Aβ1-42/Aβ1-38 resulted in a sensitivity of 94% for detection of AD and 85% specificity for excluding NAD. Decreased CSF Aβ1-42 represents a core biomarker for AD. The lack of specificity for exclusion of NAD can be most effectively compensated by the ratio Aβ1-42/Aβ1-38. The ratio Aβ1-42/Aβ1-38/p-tau powerfully discriminates AD versus NAD and fulfils the accuracy requirements for an applicable screening and differential diagnostic AD biomarker.
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Metadata
Title
Combined CSF tau, p-tau181 and amyloid-β 38/40/42 for diagnosing Alzheimer’s disease
Authors
Volker Welge
Oliver Fiege
Piotr Lewczuk
Brit Mollenhauer
Hermann Esselmann
Hans-Wolfgang Klafki
Stefanie Wolf
Claudia Trenkwalder
Markus Otto
Johannes Kornhuber
Jens Wiltfang
Mirko Bibl
Publication date
01-02-2009
Publisher
Springer Vienna
Published in
Journal of Neural Transmission / Issue 2/2009
Print ISSN: 0300-9564
Electronic ISSN: 1435-1463
DOI
https://doi.org/10.1007/s00702-008-0177-6

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