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Braz. j. med. biol. res ; 30(4): 459-63, Apr. 1997. tab, graf
Artículo en Inglés | LILACS | ID: lil-191383

RESUMEN

Alpha-Melanocyte-stimulating hormone (alpha-MSH;0.6 and 3 nmol) microinjected into the anteroventral region of the third ventricle (AV3V) induced a significant increase in diuresis without modifying natriuresis or kaliuresis. Intraperitoneal (ip) injection of alpha-MSH (3 and 9.6 nmol) induced a significant increase urinary sodium, potassium and water excretion. Intraperitoneal (3 and 4.8 nmol) or iv (3 and 9.6 nmol) administration of alpha-MSH did not induce any significant changes in plasma atrial natriuretic peptide (ANP), suggesting that the natriuresis, kaliuresis and diuresis induced by the systemic action of alpha-MSH can be dissociated from the increase in plasma ANP. These preliminary results suggest that alpha-MSH may be involved in a gamma-MSH-independent mechanism of regulation of hydromineral metabolism.


Asunto(s)
Ratas , Masculino , Animales , alfa-MSH/fisiología , Factor Natriurético Atrial/fisiología , Ventrículos Cerebrales/fisiología , Diuresis/fisiología , Natriuresis/fisiología , Factor Natriurético Atrial/sangre , Inyecciones Intraperitoneales , Inyecciones Intravenosas , Ratas Wistar
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