Biomaterial Database

A direct radioimmunoassay for free aldosterone in urine without extraction and chromatography. 1976

W Hubl, and F Stahl, and M Büchner, and C D Garten

A direct radioimmunoassay for the determination of free (unconjugated) aldosterone in urine has been developed for the clinical laboratory. The method is based on a determination without extraction and chromatography. In comparison with a reference method including extraction and column chromatography on Sephadex LH 20 a highly significant correlation was found. The coefficient of variation was 5.6% for intraassay variability and 10.4% for interassay determinations. In normal adults the average value of the urinary free aldosterone was 190 ng/24 h (range: 60--320 ng/24 h). During sodium restriction, a 3 fold increase in free aldosterone was observed in normal subjects. In patients with adrenal insufficiency, the values were below 60 ng/24 h, and in two patients with Conn's syndrome, the excretion of free aldosterone was 890 and 1040 ng/24 h. The method was found suitable for routine clinical use.

UI	MeSH Term	Description	Entries
D011863	Radioimmunoassay	Classic quantitative assay for detection of antigen-antibody reactions using a radioactively labeled substance (radioligand) either directly or indirectly to measure the binding of the unlabeled substance to a specific antibody or other receptor system. Non-immunogenic substances (e.g., haptens) can be measured if coupled to larger carrier proteins (e.g., bovine gamma-globulin or human serum albumin) capable of inducing antibody formation.	Radioimmunoassays
D012016	Reference Values	The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.	Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006929	Hyperaldosteronism	A condition caused by the overproduction of ALDOSTERONE. It is characterized by sodium retention and potassium excretion with resultant HYPERTENSION and HYPOKALEMIA.	Aldosteronism,Conn Syndrome,Conn's Syndrome,Primary Hyperaldosteronism,Conns Syndrome,Hyperaldosteronism, Primary,Syndrome, Conn,Syndrome, Conn's
D000224	Addison Disease	An adrenal disease characterized by the progressive destruction of the ADRENAL CORTEX, resulting in insufficient production of ALDOSTERONE and HYDROCORTISONE. Clinical symptoms include ANOREXIA; NAUSEA; WEIGHT LOSS; MUSCLE WEAKNESS; and HYPERPIGMENTATION of the SKIN due to increase in circulating levels of ACTH precursor hormone which stimulates MELANOCYTES.	Addison's Disease,Primary Adrenal Insufficiency,Primary Adrenocortical Insufficiency,Primary Hypoadrenalism,Addisons Disease,Adrenal Insufficiency, Primary,Adrenocortical Insufficiencies, Primary,Adrenocortical Insufficiency, Primary,Disease, Addison,Hypoadrenalism, Primary,Hypoadrenalisms, Primary,Insufficiencies, Primary Adrenocortical,Insufficiency, Primary Adrenocortical,Primary Adrenocortical Insufficiencies
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D000450	Aldosterone	A hormone secreted by the ADRENAL CORTEX that regulates electrolyte and water balance by increasing the renal retention of sodium and the excretion of potassium.	Aldosterone, (+-)-Isomer,Aldosterone, (11 beta,17 alpha)-Isomer