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  • Title: [Serum osteocalcin in hyperthyroidism].
    Author: Roiter I, Legovini P, Da Rin G, Galliazzo S, Di Virgilio R, Foscolo G, Breda F, Conte N.
    Journal: Ann Ital Med Int; 1990; 5(2):95-9. PubMed ID: 2248865.
    Abstract:
    Several bone metabolism biochemical parameters were measured to evaluate the increased serum osteocalcin (sBGP) in hyperthyroidism. Twenty patients (19 women and 1 man, aged 22-69) and 20 age and sex-matched healthy subjects were examined. The following serum measurements were performed: calcium, phosphate, mid-molecule PTH, calcitonin, 25OH vitD, alkaline phosphatase, total and free thyroid hormones; urinary excretion of calcium, hydroxyproline and creatinine was also measured. The results (mean +/- standard error) show significant increases of sBGP (16.4 +/- 1.02 ng/mL; p less than 0.001), serum calcium (10.1 +/- 0.1 mg/dL; p less than 0.001), alkaline phosphatase (144.0 +/- 11.7 UI/L; p less than 0.001), urinary calcium (315.6 +/- 48.5 mg/g urinary creatinine; p less than 0.001) and hydroxyproline (43.0 +/- 6.1 mg/g urinary creatinine; p less than 0.001). A significant correlation between total and free thyroid hormones and sBGP was found. Accelerated bone turnover in hyperthyroid patients is therefore confirmed: both osteoclastic bone resorption, as suggested by increased serum and urinary calcium and urinary hydroxyproline, and osteoblastic bone formation, as suggested by increased serum osteocalcin and alkaline phosphatase, are stimulated.
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