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Glomerular Filtration Rate and Electrolyte Handling in Response to Sodium Loading and Depletion. A Twin Study

Published online by Cambridge University Press:  01 August 2014

C.E. Grim ,
Judy Z. Miller  and
Joe C. Christian
C.E. Grim*
Affiliation:
Departments of Medicine and Medical Genetics, Indiana University School of Medicine, Indianapolis
Judy Z. Miller
Affiliation:
Departments of Medicine and Medical Genetics, Indiana University School of Medicine, Indianapolis
Joe C. Christian
Affiliation:
Departments of Medicine and Medical Genetics, Indiana University School of Medicine, Indianapolis
*
Specialized Center of Research (SCOR) in Hypertension, Indiana University School of Medicine, 1100 West Michigan Street, Indianapolis, IN 46202

Abstract

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Possible genetic influences on glomerular filtration rate and electrolyte excretion were investigated in 55 (37 monozygotic, 18 dizygotic) young adult white twin pairs. Subjects were studied during a five-day hospitalization involving sodium loading and sodium depletion. No evidence of genetic variability was found in the control levels of serum or urine sodium and potassium. Following a saline infusion it was possible to detect genetic influence in electrolyte handling. Creatinine clearance, used as a measure of glomerular filtration rate, did not appear to be genetically mediated. The results indicate that genetic factors are important in sodium handling in normal individuals and that this is independent of glomerular filtration rate.

Keywords

Blood pressureGlomerular filtrationElectrolyte excretionSodium handlingGenetic factorsTwin study
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 28 , Issue 2 , April 1979 , pp. 149 - 154
Copyright
Copyright © The International Society for Twin Studies 1979

References

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