Calcitonin

Calcitonin, (thyrocalcitonin, CT), is a peptide hormone produced by the parafollicular (C-cells) of the thyroid gland. Its concentration increases with hypercalcemia. It lowers the level vápenatých iontů in the blood and thus represents an antagonist to the parathormonu produced by the main cells of the příštítných tělísek. Parathormon and calcitonin stimulate reabsorption in the ascending part of the loop of Henle, where calcium is reabsorbed transcellularly and paracellularly Parathormone reduces the resulting concentration of calcium in the urine, calcitonin increases it. In the distal part of the nephron, in addition to parathyroid hormone and calcitonin, calcitriol also participates in reabsorption of calcium.

kalcitriolu in the kidneys).
 * Bone: retains Ca + P;
 * kidney: reduces reabsorption of Ca + P;
 * intestine - no direct effect (calcitonin most likely reduces the formation of

Benchmarks
men, normal laboratory value: 3-26 ng/l

women, normal laboratory value: 2-17 ng/l

Související články

 * Calcium
 * Calcium phosphate metabolism
 * Procalcitonin

Externí odkazy

 * Kalcitonin (česká wikipedie)
 * Calcitonin (anglická wikipedie)