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.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Aged
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Aged, 80 and over
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Alleles
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Alzheimer Disease / blood*
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Alzheimer Disease / cerebrospinal fluid*
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Amyloid beta-Peptides / blood
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Amyloid beta-Peptides / cerebrospinal fluid
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Amyloid beta-Peptides / metabolism*
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Analysis of Variance
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Apolipoproteins E / blood
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Apolipoproteins E / cerebrospinal fluid
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Apolipoproteins E / metabolism*
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Female
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Humans
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Male
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Middle Aged
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Neuropsychological Tests
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Peptide Fragments / blood
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Peptide Fragments / cerebrospinal fluid
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Peptide Fragments / metabolism*
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alpha 1-Antichymotrypsin / blood
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alpha 1-Antichymotrypsin / cerebrospinal fluid
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alpha 1-Antichymotrypsin / metabolism*
Substances
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Amyloid beta-Peptides
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Apolipoproteins E
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Peptide Fragments
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alpha 1-Antichymotrypsin
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amyloid beta-protein (1-40)
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amyloid beta-protein (1-42)