confounding factors influencing amyloid beta concentration in cerebrospinal fluid
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ID: 250528
2010
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Abstract
Background. Patients afflicted with Alzheimer's disease (AD) exhibit a decrease in the cerebrospinal fluid (CSF) concentration of the 42 amino acid form of β-amyloid (Aβ42). However, a high discrepancy between different centers in measured Aβ42 levels reduces the utility of this biomarker as a diagnostic tool and in monitoring the effect of disease modifying drugs. Preanalytical and analytical confounding factors were examined with respect to their effect on the measured Aβ42 level. Methods. Aliquots of CSF samples were either treated differently prior to Aβ42 measurement or analyzed using different commercially available xMAP or ELISA assays.
Results. Confounding factors affecting CSF Aβ42 levels were storage in different types of test tubes, dilution with detergent-containing buffer, plasma contamination, heat treatment, and the origin of the immunoassays used for quantification.
Conclusion. In order to conduct multicenter studies, a standardized protocol to minimize preanalytical and analytical confounding factors is warranted.
| Reference Key |
bjerke2010internationalconfounding
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|---|---|
| Authors | ;Maria Bjerke;Erik Portelius;Lennart Minthon;Anders Wallin;Henrik Anckarsäter;Rolf Anckarsäter;Niels Andreasen;Henrik Zetterberg;Ulf Andreasson;Kaj Blennow |
| Journal | advanced biomedical research |
| Year | 2010 |
| DOI |
10.4061/2010/986310
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| URL | |
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