Document Detail


Urine pH and the relationship between urine flow and urinary prostaglandin E excretion in the rat.
MedLine Citation:
PMID:  3950529     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The relationship between urine flow and urinary prostaglandin E (PGE) excretion was investigated at constant urine pH in the anaesthetized rat. The urine pH was maintained at approximately pH 6 or pH 8 by the intravenous infusion of either ammonium chloride or sodium bicarbonate respectively. Two distinct patterns in the relationship between PGE excretion and urine flow were observed. The first showed a fall in urinary PGE excretion as the urine flow increased over the low flow range of 2-5 ml/h, and was common to both experiments. The second relationship, however, showed a marked difference between the ammonium chloride and sodium bicarbonate experiments since: (a) in acidic urine (pH 6), PGE excretion increased (P less than 0.002) with the urine flow, attaining a rate of 87 +/- 6 pmol/h (n = 6) at the highest level of flow achieved (12 ml/h); (b) in alkaline urine (pH 8), PGE excretion was significantly (P less than 0.01) higher but did not increase with urine flow, remaining constant at approximately 90 pmol/h (n = 6). The lack of any additive effect on urinary PGE excretion between increasing the urine flow and making the urine alkaline may be explained by both stimuli acting through a common mechanism, a concept which is consistent with the hypothesis that PGE may be reabsorbed in the distal nephron. The flow-dependency of urinary PGE excretion could therefore result from a reduction in reabsorption rather than the increase in passive secretion proposed previously.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
J Haylor; C J Lote
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of endocrinology     Volume:  108     ISSN:  0022-0795     ISO Abbreviation:  J. Endocrinol.     Publication Date:  1986 Feb 
Date Detail:
Created Date:  1986-03-28     Completed Date:  1986-03-28     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0375363     Medline TA:  J Endocrinol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  247-53     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Female
Hydrogen-Ion Concentration
Prostaglandins E / urine*
Rats
Rats, Inbred Strains
Thiopental / analogs & derivatives
Urination*
Chemical
Reg. No./Substance:
0/Prostaglandins E; 2095-57-0/thiobutabarbital; 76-75-5/Thiopental

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


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