Effects of calcium and parathyroid hormone on prostacyclin synthesis by vascular tissue

Abstract:

Prostacyclin generation by rat aortic rings was studied at different calcium concentrations. Extracellular calcium influenced prostacyclin synthesis, as reflected by the release of 6-keto-PGF1α into the medium, in a concentration-dependent fashion. Calcium levels beyond the physiological range (1.12-1.25 mM unbound calcium) markedly stimulated 6-keto-PGF1α production when compared with calcium-free solutions. On the other hand, addition of purified parathyroid hormone did not change 6-keto-PGF1α production at any calcium concentration tested. These data suggest that parathyroid hormone has no direct effect on prostacyclin synthesis by vascular tissue, although it might influence prostacyclin generation through changes in extracellular calcium levels. © 1987.

Año de publicación:

1987

Keywords:

Fuente:

scopus

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