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ABNORMAL VITAMIN D METABOLISM IN PAGET'S DISEASE OF BONE
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SUMMARYWe have studied several biochemical indices of bone turnover and vitamin D metabolism in 32 untreated patients with Paget's disease and in 32 age‐matched control subjects. Patients with Paget's disease, as expected, were characterized by high bone turnover, as judged by alkaline phosphatase and urinary excretion of hydroxyproline. Serum values of 24,25‐dihydroxyvitamin D3 (24,25(OH)2D3) and the ratio of 24,25(OH)2D3 to 25‐OHD were significantly lower in patients than in control subjects. Serum concentrations of 1,25(OH)2D3 were normal in Paget's disease. The distribution of values for 24,25(OH)2D3 was log normal. On the basis of the normal range computed from control subjects, patients were divided into those with low or normal values for 24,25(OH)2D3. Disease activity, as judged by biochemical indices was significantly higher in the patients with the lower values of 24,25(OH)2D3. We conclude that Paget's disease is characterized by low circulating concentrations of 24,25(OH)2D3, particularly in patients with more extensive or severe disease.
Title: ABNORMAL VITAMIN D METABOLISM IN PAGET'S DISEASE OF BONE
Description:
SUMMARYWe have studied several biochemical indices of bone turnover and vitamin D metabolism in 32 untreated patients with Paget's disease and in 32 age‐matched control subjects.
Patients with Paget's disease, as expected, were characterized by high bone turnover, as judged by alkaline phosphatase and urinary excretion of hydroxyproline.
Serum values of 24,25‐dihydroxyvitamin D3 (24,25(OH)2D3) and the ratio of 24,25(OH)2D3 to 25‐OHD were significantly lower in patients than in control subjects.
Serum concentrations of 1,25(OH)2D3 were normal in Paget's disease.
The distribution of values for 24,25(OH)2D3 was log normal.
On the basis of the normal range computed from control subjects, patients were divided into those with low or normal values for 24,25(OH)2D3.
Disease activity, as judged by biochemical indices was significantly higher in the patients with the lower values of 24,25(OH)2D3.
We conclude that Paget's disease is characterized by low circulating concentrations of 24,25(OH)2D3, particularly in patients with more extensive or severe disease.
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