Influence of sex on the urinary bilirubin excretion at increased free plasma haemoglobin levels in whole dogs and in isolated normothermic perfused dog kidneys

Résumé Si le taux sanguin en hémoglobine libre dépasse les 50 mg/100 ml, l'excrétion rénale de la bilirubine est fortement augmentée chez le chien, tandis qu'elle reste faible chez la chienne. Les mêmes résultats sont obtenues par perfusion de reins isolés avec du sang hépariné ou défibriné.     

High potassium intake increases the plasma concentration and urinary excretion of vasopressin in the rat

Summary The effect of alterations of dietary potassium intake on the plasma concentration and the urinary excretion of vasopressin was studied in male rats. Ingestion of a high potassium diet resulted in increases in the plasma concentrations of potassium and vasopressin, systolic blood pressure, urine flow, and urinary vasopressin excretion. Ingestion of a low potassium diet had little effect on the plasma vasopressin concentration and systolic blood pressure but caused decreases in the plasma potassium concentration and urinary vasopressin excretion. The results indicate that physiological changes in the plasma potassium concentration or some other consequence of altered dietary potassium intake can affect vasopressin release and excretion.     

High potassium intake increases the plasma concentration and urinary excretion of vasopressin in the rat

The effect of alterations of dietary potassium intake on the plasma concentration and the urinary excretion of vasopressin was studied in male rats. Ingestion of a high potassium diet resulted in increases in the plasma concentrations of potassium and vasopressin, systolic blood pressure, urine flow, and urinary vasopressin excretion. Ingestion of a low potassium diet had little effect on the plasma vasopressin concentration and systolic blood pressure but caused decreases in the plasma potassium concentration and urinary vasopressin excretion. The results indicate that physiological changes in the plasma potassium concentration or some other consequence of altered dietary potassium intake can affect vasopressin release and excretion.     

The effect of exogenous conjugated bilirubin on the urinary excretion of unconjugated14C-bilirubin by the Gunn rat

Resumen La inyección de bilirrubina conjugada a ratas Gunn con ligadura coledociana, produce un aumento de la excreción urinaria de bilirrubina C¹⁴ exógena o de la endógena sintetizada a partir de la inyección de ALA-C¹⁴ en dichos animales. Dicho aumento fue probado por la cristalización de la bilirrubina radioactiva de muestras de orina y por la radioactividad presente en el azopigmento A separado por cromatografía sobre papel. El aumento de pigmento I, demostrado en el suero por partitión química y en la orina por columna cromatográfica de fase inversa, permiten suponer la formación de un complejo de bilirrubina no conjugada radioactiva y de bilirrubina conjugada, como mecanismo del pasaje mencionado.

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This work was supported by grants from the Consejo Nacional de Investigaciones Científicas y Técnicas, República Argentina, National Institutes of Health, Bethesda, Md., USA and Ministerio de Salud Pública y Bienestar Social de la Provincia de Santa Fe, República Argentina.     

Urinary renin and norepinephrine excretion in dogs after unilateral renal artery constriction

Zusammenfassung Nach einseitiger Drosselung der Nierenarterie beim Hund fanden sich höhere Renin-Aktivität und Norepinephrin-Konzentration im Urin der ischämischen Niere als im Urin der Gegenseite. In der Rinde der gedrosselten Niere waren Renin-Aktivität und Granulationsindex der juxtaglomerulären Zellen höher als in der Rinde der ungeklemmten Niere, während der Natriumgehalt niedriger war.     

Auto-oxidation of hemoglobin in plasma

Summary The rate of auto-oxidation of human hemoglobin to methemoglobin was measured in plasma at 37°C. Halflives of hemoglobin were found to be 20 h, 12 h and 7 h at the oxygen tensions of 126, 57 and 23 mm Hg, respectively.     

The effect of ethionine on the increased metabolism of some drugs and increased urinary excretion of vitamin C induced by pretreatment with chloretone or phenobarbital

Riassunto L'etionina è capace di inibire l'aumentata attività metabolica del fegato sul pentobarbital e sul meprobamato indotta da un pretrattamento con fenobarbital o cloretone. Essa invece non inibisce l'induzione dell'aumento dell'eliminazione urinaria di vitamina C causata da un analoge prettamento con fenobarbital o clorotone. Si conclude che i meccanismi delle due induzioni non possono considerarsi identici.     

Effect of glucose administration on bilirubin excretion in the rabbit

Summary The effect of i.v. infusion of glucose on the hepatic handling of bilirubin was examined in rabbits. A significant increase in the excretion of conjugated bilirubin into the bile was observed, accompanied by a decrease in bilirubinemia. Hepatic bilirubin concentrations were lowered and the UDP-glucose concentrations and liver UDP-glucuronosyl and UDP-glucosyl transferase activities increased.     

Effect of glucose administration on bilirubin excretion in the rabbit

The effect of i.v. infusion of glucose on the hepatic handling of bilirubin was examined in rabbits. A significant increase in the excretion of conjugated bilirubin into the bile was observed, accompanied by a decrease in bilirubinemia. Hepatic bilirubin concentrations were lowered and the UDP-glucose concentrations and liver UDP-glucuronosyl and UDP-glucosyl transferase activities increased.     

Effects of kallidinogenase on urinary kallikrein excretion and plasma prostanoid concentrations in patients with essential hypertension

The effects of kallidinogenase on urinary kallikrein excretion, plasma immunoreactive prostanoids and platelet aggregation were investigated in patients with essential hypertension. Urinary kallikrein excretion and plasma 6-keto PGF1 alpha concentration were significantly decreased in these patients. Significant decreases in blood pressure, as well as significant increases of urinary kallikrein excretion and plasma 6-keto PGF1 alpha concentration after kallidinogenase administration were also observed.     

Auto-oxidation of hemoglobin in plasma.

The rate of auto-oxidation of human hemoglobin to methemoglobin was measured in plasma at 37 degrees C. Half-lives of hemoglobin were found to be 20 h, 12 h and 7 h at the oxygen tensions of 126, 57 and 23 mm Hg, respectively.     

Effects of kallidinogenase on urinary kallikrein excretion and plasma prostanoid concentrations in patients with essential hypertension

Summary The effects of kallidinogenase on urinary kallikrein excretion, plasma immunoreactive prostanoids and platelet aggregation were investigated in patients with essential hypertension. Urinary kallikrein excretion and plasma 6-keto PGF₁ concentration were significantly decreased in these patients. Significant decreases in blood pressure, as well as significant increases of urinary kallikrein excretion and plasma 6-keto PGF₁ concentration after kallidinogenase administration were also observed.     

The relationship between urinary excretion of 17-hydroxycorticosteroids and glycosaminoglycans

Zusammenfassung Während 2 simulierten, 14 Tage dauernden Raumflügen wurde bei 2 Astronauten untersucht, ob zwischen der Ausscheidung von Glycosaminglycanen und der Ausscheidung der Nebennierenrindensteroide eine Korrelation besteht. Eine signifikante Korrelation zwischen diesen beiden Parametern wurde gefunden.     

The effect of fluorocitrate on urinary calcium and citrate excretion

Summary The renal handling of calcium and citrate was studied in dogs after the administration of fluorocitrate. The drug produced a significant increase in urinary calcium and citrate excretion. Net renal secretion of citrate occurred during the infusion of fluorocitrate since citrate clearances exceeded the glomerular filtration rate.