Measurement of intact parathormone in hyperthyroidism.
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Adult↗
Biomedical subjects
S Galliazzo
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[Serum osteocalcin in hyperthyroidism].
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.
Adult↗