Concentration gradients for monoamine metabolites in lumbar cerebrospinal fluid |
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Authors: | K. Blennow, A. Wallin, C. G. Gottfries, J. -E. Må nsson L. Svennerholm |
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Affiliation: | (1) Present address: Department of Psychiatry and Neurochemistry, University of Göteborg, Mölndal Hospital, S-43180 Mölndal, Sweden |
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Abstract: | Summary Concentration gradients in lumbar cerebrospinal fluid (CSF) for the monoamine metabolites homovanillic acid (HVA), 5-hydroxy-indoleacetic acid (5-HIAA) and 4-hydroxy-3-methoxyphenylglycol (HMPG) were studied in 9 healthy controls and 47 neuropsychiatric patients without diseases causing disturbed CSF circulation. In a serial sampling of the first 24 ml of CSF, steep concentration gradients between the first (0–4 th ml) and last (21th–24th ml) portions of CSF were found for HVA (99±59% increase; p<0.001) and 5-HIAA (88±54% increase; p<0.001), while the concentration gradient was slight for HMPG (11±7% increase; p<0.001). The existence of marked concentration gradients for the monoamine metabolites HVA and 5-HIAA gives further evidence for an active transport system for these metabolites and indicates that the lumbar CSF-HVA and 5-HIAA levels reflect the dopamine and serotonin metabolism in the brain. Moreover, the existence of pronounced concentration gradients for HVA and 5-HIAA levels reflect the dopamine and serotonin metabolism in the brain. Moreover, the existence of pronounced concentration gradients for HVA and 5-HIAA stresses the importance of making analyses on a standardized volume of CSF. |
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Keywords: | Homovanillic acid (HVA) 5-hydroxy-indoleacetic acid (5-HIAA) 4-hydroxy-3-methoxyphenylglycol (HMGP) cerebrospinal fluid (CSF) concentration gradients |
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