Title : Comparison of parathyroid hormone and calcitonin on rat renal calcium and magnesium transport.

Pub. Date : 1992 Jun

PMID : 1606745






9 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 Comparison of parathyroid hormone and calcitonin on rat renal calcium and magnesium transport. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
2 Because in vitro adenylate cyclase activity studies suggest that parathyroid hormone (PTH) and calcitonin (CT) increase renal tubular calcium and magnesium reabsorption by stimulating the same transport mechanism, the separate and combined effects of these hormones on calcium and magnesium transport was assessed in the rat. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
3 Because in vitro adenylate cyclase activity studies suggest that parathyroid hormone (PTH) and calcitonin (CT) increase renal tubular calcium and magnesium reabsorption by stimulating the same transport mechanism, the separate and combined effects of these hormones on calcium and magnesium transport was assessed in the rat. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
4 Because in vitro adenylate cyclase activity studies suggest that parathyroid hormone (PTH) and calcitonin (CT) increase renal tubular calcium and magnesium reabsorption by stimulating the same transport mechanism, the separate and combined effects of these hormones on calcium and magnesium transport was assessed in the rat. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
5 Fractional excretion of calcium was 9.5 +/- 0.5% in calcium-infused thyroparathyroidectomized (TPTX) rats and was reduced to 5.1 +/- 0.6 and 4.1 +/- 0.6% by maximal hypocalciuric concentrations of PTH and CT, respectively. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
6 Fractional excretion of calcium was 9.5 +/- 0.5% in calcium-infused thyroparathyroidectomized (TPTX) rats and was reduced to 5.1 +/- 0.6 and 4.1 +/- 0.6% by maximal hypocalciuric concentrations of PTH and CT, respectively. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
7 Combined administration of maximal PTH and CT produced an effect on fractional and absolute calcium excretion similar to that recorded with maximal CT alone. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
8 The combined administration of half-maximal concentrations of PTH and CT also produced a comparable fall in the fractional excretion of calcium to 3.0 +/- 0.7%, which was similar to that observed in the "maximal CT" and "maximal PTH plus CT" groups. Calcium calcitonin-related polypeptide alpha Rattus norvegicus
9 These results support biochemical data suggesting that PTH and CT act upon the same transport site, presumably within the thick ascending limb of Henle"s loop, to facilitate calcium and magnesium reabsorption. Calcium calcitonin-related polypeptide alpha Rattus norvegicus