Glucose availability and the electrophysiology of the human visual system |
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Authors: | L Lopez WG Sannita |
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Affiliation: | Section Pharmacotherapy, University of Ulm, Germany. |
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Abstract: | Immunoreactive parathyroid hormone-related protein (PTH-rP) was measured in simultaneously obtained cerebrospinal fluid (CSF) and plasma from 51 patients suspected of suffering from a prolapsed intervertebral disc. Endocrine or psychiatric diseases were excluded. In addition, immunoreactive parathyroid hormone (PTH) in the CSF samples was measured. Both, PTH-rP and PTH were assayed by immunoradiometric assay. The results indicate the presence of both, PTH-rP and PTH in CSF. The following concentrations (mean values +/- SD) were found: PTH-rP (pmol/l) in CSF without pleocytosis (n = 17) 0.432 +/- 0.157, with pleocytosis (n = 34) 0.654 +/- 0.675; in plasma (pmol/l) 54.1 +/- 14.632; PTH (nmol/l) in CSF without pleocytosis (n = 17) 0.454 +/- 0.099, with pleocytosis (n = 34) 0.437 +/- 0.140, and in plasma 4.272 +/- 0.794. The concentrations of both, PTH-rP and PTH, in CSF with and without pleocytosis were not significantly different. No correlation was found between PTH-rP and PTH values. The present study demonstrated PTH-rP as a normal constituent in human CSF. |
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