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Title: The measurement of the vitamin D-binding protein in human serum
Authors: Bouillon, Roger ×
Van Baelen, Hugo
De Moor, Pieter #
Issue Date: Aug-1977
Publisher: Issued for the Endocrine Society by the Williams & Wilkins Co.
Series Title: Journal of Clinical Endocrinology and Metabolism vol:45 issue:2 pages:225-31
Abstract: The concentration of the vitamin D-binding protein was measured in human serum by single radial immunodiffusion. Normal serum concentrations were slightly higher in normal women than in normal men. No race-related difference was found between white people from Belgium and black people from Zaire. Lower concentrations were found in cord serum and in patients with cirrhosis of the liver. Increased serum levels were observed during pregnancy or during the intake of estro-progestogens. The serum level of the vitamin D-binding protein was not altered in various diseases of calcium metabolism (primary osteoporosis, primary and secondary hyperparathyroidism, rickets, osteomalacia or vitamin D intoxication). No correlation was found between serum levels of 25-hydroxy vitamin D and those of its binding protein. From these data the following conclusions can be drawn: 1) The serum concentration of the vitamin D-binding protein (about 6.10(-6)M) largely exceeds the normal serum concentration of 25-hydroxy vitamin D (about 4.10(-8)M), so that this protein is normally for less than 1% saturated, 2) Normal serum levels of the vitamin D-binding protein were observed in several diseases of calcium metabolism, and 3) The free concentration of 25-hydroxyvitamin D is not regulated at a constant level.
ISSN: 0021-972X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Clinical and Experimental Endocrinology
× corresponding author
# (joint) last author

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