Document Detail


Renal regulation of interorgan glutamine flow in metabolic acidosis.
MedLine Citation:
PMID:  3777214     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The regulation of interorgan glutamine flow was studied in control and chronically metabolically acidotic rats. Net glutamine extraction or production across the kidneys, gut, liver, and hindquarters was determined in fasted anesthetized animals from organ blood flows and the arteriovenous glutamine concentration difference. In control animals glutamine flows from the hindquarters to the splanchnic bed. In chronic acidosis glutamine production by the hindquarters rose threefold and was redirected to the kidneys; splanchnic bed glutamine uptake was eliminated. Associated with this was a 39% fall and a 62% rise in arterial glutamine and ammonia concentrations, respectively. Removing the kidneys from the circulation returned arterial glutamine and ammonia concentrations to control nonacidotic levels within 30 min. Net glutamine production by the hindquarters decreased, whereas splanchnic bed glutamine extraction increased. Hindquarter glutamine production appears to be modulated by renal venous ammonia; splanchnic bed glutamine extraction is load dependent, reflecting the influence of renal glutamine consumption on the steady-state arterial levels. Thus the removal of the kidneys returns interorgan glutamine flow to that observed in nonacidotic animals consistent with a major role of the kidneys in regulating glutamine flow and nitrogen metabolism in chronic metabolic acidosis.
Authors:
T C Welbourne; D Childress; G Givens
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American journal of physiology     Volume:  251     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1986 Nov 
Date Detail:
Created Date:  1986-12-15     Completed Date:  1986-12-15     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  R859-66     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Acidosis / metabolism,  physiopathology*
Animals
Arteries
Glutamine / blood,  metabolism*
Kidney / metabolism,  physiology*
Male
Rats
Rats, Inbred Strains
Grant Support
ID/Acronym/Agency:
AM-21016/AM/NIADDK NIH HHS
Chemical
Reg. No./Substance:
56-85-9/Glutamine

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


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