PMID: 11335065May 4, 2001Paper

Amyloid beta protein 1-40 and 1-42 levels in matched cerebrospinal fluid and plasma from patients with Alzheimer disease

Neuroscience Letters
P D MehtaS P Mehta

Abstract

We quantitated amyloid beta proteins 1-40 (Abeta40) and 1-42 (Abeta42), and alpha1- antichymotrypsin (ACT) in matched cerebrospinal fluid (CSF) and plasma of 50 patients with probable Alzheimer disease, and analyzed the relationships with age, sex, Mini-Mental State Examination (MMSE), and apolipoprotein E phenotype. There was no relation between CSF Abeta40 and Abeta42 levels with those of plasma. CSF and plasma Abeta40 and Abeta42 levels showed no association with age, sex, and MMSE score. There was a significant correlation between CSF ACT and plasma ACT levels. The data suggest that plasma ACT crosses the blood-brain barrier. However, a lack of correlation between CSF Abeta40 and Abeta42 levels with those of plasma suggests that Abeta in CSF and plasma originates from different sources.

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Citations

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