PMID: 25782284Mar 19, 2015Paper

Effects of neurohypophysial nonapeptides and their analogues on magnesium excretion by rat kidney

Zhurnal evoliutsionnoĭ biokhimii i fiziologii
A V KutinaYu V Natochin

Abstract

Effects of neurohypophysial nonapeptides of vertebrates (vasopressin, vasotocin, and their synthetized analogues) on urinary magnesium excretion were studied in rats. Neurohypophysial hormones and their analogues at doses stimulating V2-receptors (0.0001-0.001 nmol/100 g BW) produced antidiuretic effect and reduced urinary magnesium excretion. At the higher doses activating V2- and V1a-receptors (0.025-0.1 nmol/100g BW), vasotocin and its analogues (deamino-vasotocin (dAVT), deamino-Thr4-vasotocin, deamino-hArg8-vasotocin, deaminomonocarbo-vasotocin) enhanced excretion of magnesium and sodium ions. Direct relation between increase in renal excretion of sodium and magnesium ions was found under these conditions. dAVT induced 10 times lesser increase in magnesium excretion after administration of a V1a-receptor antagonist. An antagonist of V2-receptors did not affect the dAVT-induced magniuresis. The obtained data suggest that V-receptors take part in regulation of magnesium transport in rat kidney.

References

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