May 1, 1977

Deuterium induced extinction of ADH-release in response to intracerebroventricular infusions of hypertonic NaCl and angiotensin

Acta Physiologica Scandinavica
M RundgrenB Andersson

Abstract

Infusions (20 microliter/min) of hypertonic (0.3 M) NaCl and angiotensin II (1 ng/kg min-1) in isotonic (0.15 M) NaCl were made for 1 h in the hydrated goat during fully developed water diruesis. Either H2O or deuterium (D2O) WAS USED AS SOLVENT. A pronounced antidiuretic response, outlasting the infusion period by 30 min or more, was seen when the substances were dissolved in H2O. Only a weak inhibition of the water diuresis, which was extinguished during the infusion period, was obtained when D2O was used as the solvent. The infusion of 0.3 M NaCl/H2O invariably induced drinking in one of the goats, which, however, showed no drinking response to the infusions of 0.3 M NaCl/D2O. The possibility is discussed that D2O (perhaps by its inhibitory effect on (Na+-K+)-ATPase activity) reduced the sensitivity of juxtaventricular receptors regulating ADH-release and water intake.

Mentioned in this Paper

Hyrex Brand of Dimenhydrinate
Pitressin
Diuresis
Angiotensins
Angiotensin II, Val(5)-
Metabolic Inhibition
Saline Solution, Hypertonic
Sodium Chloride
Capra hircus
Sodium Chloride, (24)NaCl

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