Parathyroid hormone is concerned with urolithiasis, and regulated by serum ionized calcium concentration. We thought that parathyroid hormone might also be regulated by a hormone. 1 mg of ACTH injection was given intramuscularly to 6 patients with primary hyperparathyroidism, 6 patients with urolithiasis, and 5 control subjects. Serum calcium significantly increased 2 h after ACTH injection in primary hyperparathyroidism. However in the other two groups, an increase of serum calcium was not observed. Parathyroid hormone increased after ACTH injection in most subjects of all three groups. Calcium concentration in a culture medium of parathyroidectomy increased in 4 cases, and the parathyroid hormone concentration in the culture medium increased in 3 cases after ACTH addition. From these data, we believe that ACTH directly influences the parathyroid glands, and that calcium is released from the parathyroid cells. Therefore, the decrease in calcium concentration in the parathyroid cells activates the excretion of parathyroid hormone. The fact that serum parathyroid hormone increases in most subjects in all groups supports our hypothesis, namely that ACTH acts directly on the parathyroid gland.

Keywords:
Parathyroid hormone, Calcium, Adrenocorticotropic hormone, Cortisol, Urolithiasis, Primary hyperparathyroidism
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© 1984 S. Karger AG, Basel
1984
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