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Effect of Growth Hormone Administration: Reciprocal Changes in Serum lα,25-Dihydroxyvitamin D and Intestinal Calcium Absorption

Effect of Growth Hormone Administration: Reciprocal Changes in Serum lα,25-Dihydroxyvitamin D and... Abstract The mechanism by which GH stimulates intestinal calcium absorption was explored. In this study, seven children with idiopathic GH deficiency were studied before and during GH therapy while they were maintained on the same metabolic diet. After 5–14 months of GH administration, fractional intestinal calcium absorption increased from 0.364 ± 0.114 to 0.449 ± 0.159 (P < 0.01), and serum 1,25-dihydroxyvitamin D decreased from 63.7 ± 19.3 to 46.7 ± 17.8 pg/ml (P < 0.025). Serum immunoreactive parathyroid hormone, urinary cAMP, serum 24,25-dihydroxyvitamin D, and 25-hydroxyvitamin D did not change significantly.The data suggest that GH does not directly influence parathyroid hormone or vitamin D metabolism. The possibility that relative intestinal resistance to 1,25-dihydroxyvitaminD exists in patients with GH deficiency is considered. (J Clin Endocrinol Metab51: 321, 1980) This content is only available as a PDF. Author notes * This work was supported by USPHS Grants ROl-AM-16061, P50 AM-20543, MOl-RR-00633, and ROl-HD-10909-01 and Training Grant AM-07307-02. Copyright © 1980 by The Endocrine Society http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Clinical Endocrinology and Metabolism Oxford University Press

Effect of Growth Hormone Administration: Reciprocal Changes in Serum lα,25-Dihydroxyvitamin D and Intestinal Calcium Absorption

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References (14)

Publisher
Oxford University Press
Copyright
Copyright © 1980 by The Endocrine Society
ISSN
0021-972X
eISSN
1945-7197
DOI
10.1210/jcem-51-2-321
Publisher site
See Article on Publisher Site

Abstract

Abstract The mechanism by which GH stimulates intestinal calcium absorption was explored. In this study, seven children with idiopathic GH deficiency were studied before and during GH therapy while they were maintained on the same metabolic diet. After 5–14 months of GH administration, fractional intestinal calcium absorption increased from 0.364 ± 0.114 to 0.449 ± 0.159 (P < 0.01), and serum 1,25-dihydroxyvitamin D decreased from 63.7 ± 19.3 to 46.7 ± 17.8 pg/ml (P < 0.025). Serum immunoreactive parathyroid hormone, urinary cAMP, serum 24,25-dihydroxyvitamin D, and 25-hydroxyvitamin D did not change significantly.The data suggest that GH does not directly influence parathyroid hormone or vitamin D metabolism. The possibility that relative intestinal resistance to 1,25-dihydroxyvitaminD exists in patients with GH deficiency is considered. (J Clin Endocrinol Metab51: 321, 1980) This content is only available as a PDF. Author notes * This work was supported by USPHS Grants ROl-AM-16061, P50 AM-20543, MOl-RR-00633, and ROl-HD-10909-01 and Training Grant AM-07307-02. Copyright © 1980 by The Endocrine Society

Journal

Journal of Clinical Endocrinology and MetabolismOxford University Press

Published: Aug 1, 1980

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