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Calcium and Phosphorus Homeostasis in ManEffect of Corticosteroids
Barbara P. Lukert, MD;
John S. Adams, MD
Arch Intern Med. 1976;136(11):1249-1253.
Abstract
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Serum calcium and phosphorus levels, urinary excretion rates of calcium, phosphorus, and cyclic adenosine monophosphate (cAMP), and plasma parathyroid hormone (PTH) concentrations were determined in 11 normal subjects and in nine patients maintained on long-term prednisone therapy for chronic obstructive pulmonary disease. These same determinations were repeated in five of the prednisone-treated patients during the course of a seven-day calcium infusion. Prior to the infusion, the prednisonetreated patients demonstrated significantly elevated serum levels of PTH (P <.005) and increased rates of urinary phosphate and cAMP excretion (P <.005) when compared with normal subjects. After initiation of calcium infusion, the previous elevations in all of these determinations decreased to near normal levels. These data suggest that the effects of secondary hyperparathyroidism in patients maintained on long-term prednisone therapy may be overcome when calcium is administered intravenously.
(Arch Intern Med 136:1249-1253, 1976)
Author Affiliations
From the Section of Endocrinology and Metabolism, Department of Medicine, University of Kansas Medical Center, Kansas City, Kan.
Footnotes
Received for publication Oct 2, 1975; accepted March 9, 1976.
Reprint requests to Section of Endocrinology and Metabolism, Department of Medicine, University of Kansas Medical Center, Kansas City, KS 66103 (Dr Lukert).
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