Big renin and biosynthetic defect of aldosterone in diabetes mellitus. 1976

A deLeiva, and A R Christlieb, and J C Melby, and C A Graham, and R P Day, and J A Luetscher, and P G Zager

To determine the cause of selective aldosterone deficiency in two patients with diabetes mellitus, studies of renin and of aldosterone-precursor metabolites were performed under conditions of sodium depletion and ACTH stimulation. Plasma renin concentration was elevated in both patients, and stimulated plasma renin activity was low in one and normal in the other. Fractionation of plasma extracts demonstrated the presence of "big renin," a relatively inactive precursor of renin. Metabolites of aldosterone precursors were increased, suggesting deficient 18-hydroxylase in one patient and dehydrogenase in the other. The results suggest that hypoaldosteronism in diabetic patients may result from combined defects in both renin and aldosterone biosynthesis.

UI MeSH Term Description Entries
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008970 Molecular Weight The sum of the weight of all the atoms in a molecule. Molecular Weights,Weight, Molecular,Weights, Molecular
D011188 Potassium An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
D012083 Renin A highly specific (Leu-Leu) endopeptidase that generates ANGIOTENSIN I from its precursor ANGIOTENSINOGEN, leading to a cascade of reactions which elevate BLOOD PRESSURE and increase sodium retention by the kidney in the RENIN-ANGIOTENSIN SYSTEM. The enzyme was formerly listed as EC 3.4.99.19. Angiotensin-Forming Enzyme,Angiotensinogenase,Big Renin,Cryorenin,Inactive Renin,Pre-Prorenin,Preprorenin,Prorenin,Angiotensin Forming Enzyme,Pre Prorenin,Renin, Big,Renin, Inactive
D001786 Blood Glucose Glucose in blood. Blood Sugar,Glucose, Blood,Sugar, Blood
D003345 Corticosterone An adrenocortical steroid that has modest but significant activities as a mineralocorticoid and a glucocorticoid. (From Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p1437)
D003920 Diabetes Mellitus A heterogeneous group of disorders characterized by HYPERGLYCEMIA and GLUCOSE INTOLERANCE.
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006947 Hyperkalemia Abnormally high potassium concentration in the blood, most often due to defective renal excretion. It is characterized clinically by electrocardiographic abnormalities (elevated T waves and depressed P waves, and eventually by atrial asystole). In severe cases, weakness and flaccid paralysis may occur. (Dorland, 27th ed) Hyperpotassemia,Hyperkalemias,Hyperpotassemias

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