Document Detail


Aldosterone metabolism in isolated perfused rat kidney.
MedLine Citation:
PMID:  645899     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The renal metabolism and handling of [1,2-3H]aldosterone ([3H]A) was studied using isolated perfused rat kidney under different perfusion conditions. The metabolite production rate (MPR) and the urinary excretion of [3H]A together with its radiometabolites (UV/P3H) were studied. Among the formed metabolites, no acid-labile conjugate of aldosterone (ALC) was detected. The MPR was not altered in studies using nonfiltering kidney, a result that suggests that the majority of metabolites were formed without requirement of the process of glomerular filtration and tubular uptake of the hormone. High perfusion pressure (high PP) resulted in a striking increase in whole metabolic clearance rate of aldosterone (MCR[3H]A) due mostly to an enhanced urinary excretion of intact aldosterone and, to a lesser degree, to a significant increase in MPR. Factors determining the excretion rate of [3H]A and its metabolites were than investigated under administration of diuretics. Mannitol (44 mM) induced a marked increase in urine volume (UV) accompanied by a significant UV/P3H increase. Meanwhile, 0.1 mM furosemide resulted in an increase only in UV, but not in UV/P3H. These results revealed the UV dependence of aldosterone excretion in certain diuretic conditions.
Authors:
H Nakane; Y Nakane; G Reach; P Corvol; J Menard
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Publication Detail:
Type:  In Vitro; Journal Article    
Journal Detail:
Title:  The American journal of physiology     Volume:  234     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1978 May 
Date Detail:
Created Date:  1978-06-28     Completed Date:  1978-06-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  E472-9     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Aldosterone / metabolism*
Animals
Furosemide / pharmacology
Glomerular Filtration Rate
Kidney / drug effects,  metabolism*,  physiology
Male
Mannitol / pharmacology
Metabolic Clearance Rate
Perfusion
Pressure
Rats
Chemical
Reg. No./Substance:
52-39-1/Aldosterone; 54-31-9/Furosemide; 69-65-8/Mannitol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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