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Multiplexed quantification of dementia biomarkers in the CSF of patients with early dementias and MCI: a multicenter study

Item Type:Article
Title:Multiplexed quantification of dementia biomarkers in the CSF of patients with early dementias and MCI: a multicenter study
Creators Name:Lewczuk, P. and Kornhuber, J. and Vanderstichele, H. and Vanmechelen, E. and Esselmann, H. and Bibl, M. and Wolf, S. and Otto, M. and Reulbach, U. and Koelsch, H. and Jessen, F. and Schroeder, J. and Schoenknecht, P. and Hampel, H. and Peters, O. and Weimer, E. and Perneczky, R. and Jahn, H. and Luckhaus, C. and Lamla, U. and Supprian, T. and Maler, J.M. and Wiltfang, J.
Abstract:In this report we evaluated the clinical performance of APOE genotyping and three protein biomarkers (total tau, beta-amyloid(1-42), and tau phosphorylated at threonine 181) in a prospective multicenter study using the INNO-BIA AlzBio3 assay applied on Luminex platform. Concentration of biomarkers of Alzheimer's disease in cerebrospinal fluid (CSF) was measured with multiplexing technology (n=223), and compared to the results of ELISA assays in patients with early dementias or mild cognitive impairment (MCI) collected at 12 gerontopsychiatric university departments, and APOE genotyping was performed. Concentrations of Abeta(1-42) were statistically significantly lower in MCI-AD subjects compared to MCI-O, and significantly lower in D-AD patients compared to MCI-O. P-tau(181P) concentrations were significantly higher in MCI-AD patients compared to MCI-O, and significantly higher in D-AD patients compared to MCI-O. The total tau concentrations in MCI-AD patients were significantly higher compared to MCI-O, and higher in D-AD compared to MCI-O, moreover, the concentration of total tau was significantly higher in D-AD compared to MCI-AD patients. For the differential diagnosis between D-AD and D-O, the optimal cutoff concentration of Abeta(1-42) was 197.7 pg/mL, and that for P-tau(181P) was 47.9 pg/mL. These cutoff values were also applied to discriminate between MCI-AD and MCI-O subjects. Simultaneous measurement of the biomarkers significantly improves management of the samples and quality control of the assays' performance.
Keywords:Alzheimer's Disease, Biomarkers, Amyloid, Tau, Cerebrospinal Fluid, Multiplexing
Source:Neurobiology of Aging
ISSN:0197-4580
Publisher:Elsevier (The Netherlands)
Volume:29
Number:6
Page Range:812-818
Date:June 2008
Official Publication:https://doi.org/10.1016/j.neurobiolaging.2006.12.010
PubMed:View item in PubMed

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