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Influence of the Vitamin D-binding Protein on the Serum Concentration of 1,25-Dihydroxyvitamin D3: SIGNIFICANCE OF THE FREE 1,25-DIHYDROXYVITAMIN D3 CONCENTRATION
Roger Bouillon, … , Walter Heyns, Pieter De Moor
Roger Bouillon, … , Walter Heyns, Pieter De Moor
Published March 1, 1981
Citation Information: J Clin Invest. 1981;67(3):589-596. https://doi.org/10.1172/JCI110072.
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Influence of the Vitamin D-binding Protein on the Serum Concentration of 1,25-Dihydroxyvitamin D3: SIGNIFICANCE OF THE FREE 1,25-DIHYDROXYVITAMIN D3 CONCENTRATION

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Abstract

The influence of the serum binding protein (DBP) for vitamin D and its metabolites on the concentration of its main ligands, 25-hydroxyvitamin D3 (25-OHD3) and 1,25-dihydroxyvitamin D3 (1,25-[OH]2D3) was studied. The concentration of both 1,25-(OH)2D3 and DBP in normal female subjects (45±14 ng/liter and 333±58 mg/liter, mean±SD, respectively; n = 58) increased during the intake of estro-progestogens (69±27 ng/liter and 488±90 mg/liter, respectively; n = 29), whereas the 25-OHD3 concentration remained unchanged. A positive correlation was found between the concentrations of 1,25-(OH)2D3 and DBP in these women.

Authors

Roger Bouillon, Frans A. Van Assche, Hugo Van Baelen, Walter Heyns, Pieter De Moor

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