Document Detail


Potassium depletion and salt-sensitive hypertension in Dahl rats: effect on calcium, magnesium, and phosphate excretions.
MedLine Citation:
PMID:  7581265     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Weanling male inbred Dahl rats (Jr salt-sensitive (S) and salt-resistant (R) strains) were placed on high (4%, HK) and low (0.2%, LK) potassium diets for 4 weeks. Both diets contained 8% sodium chloride, 2.5% calcium, 0.8% magnesium, and 2.0% phosphorous. Balance studies were carried out during the final week on the diets. Mean arterial blood pressure was determined, and dietary intake and urinary output of water, sodium, chloride, potassium, calcium, magnesium, and phosphate were monitored daily during this period. The data show that blood pressures of S rats were significantly higher than those of R rats on both HK and LK diets; however, reduced dietary potassium was associated with increased blood pressure in both strains. Urinary excretions of calcium and magnesium were higher, and urinary phosphate excretion was lower, in S compared to R rats. Decreased potassium intake was associated with increased excretion of calcium, magnesium and phosphate in both strains. The changes in calcium and magnesium excretion were significantly correlated to blood pressure across strains and diets. We conclude that the effects of a high salt diet on increasing blood pressure can be potentiated by lack of potassium, even in previously salt-resistant rats. Increased blood pressure is associated with increased divalent cation excretion. It is not yet known whether this is a cause-and-effect relationship.
Authors:
X Wu; U Ackermann; H Sonnenberg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Clinical and experimental hypertension (New York, N.Y. : 1993)     Volume:  17     ISSN:  1064-1963     ISO Abbreviation:  Clin. Exp. Hypertens.     Publication Date:  1995 Aug 
Date Detail:
Created Date:  1995-12-07     Completed Date:  1995-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9305929     Medline TA:  Clin Exp Hypertens     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  989-1008     Citation Subset:  IM    
Affiliation:
Department of Physiology, University of Toronto, Ontario, Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure / physiology
Calcium / urine*
Drug Resistance
Hypertension / etiology*,  physiopathology,  urine*
Kidney / physiopathology
Magnesium / urine*
Male
Phosphates / urine*
Potassium Deficiency / complications*
Rats
Rats, Inbred Strains
Sodium Chloride / administration & dosage
Chemical
Reg. No./Substance:
0/Phosphates; 7439-95-4/Magnesium; 7440-70-2/Calcium; 7647-14-5/Sodium Chloride

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


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