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Related Experiment Videos

Remnant kidney oxygen consumption: hypermetabolism or hyperbole?

R M Culpepper1, A C Schoolwerth

  • 1Division of Nephrology, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0160.

Journal of the American Society of Nephrology : JASN
|August 1, 1992
PubMed
Summary

Reduced kidney mass in rats and dogs leads to nephron hypermetabolism, increasing oxygen consumption (QO2) and causing progressive kidney scarring. Lowering QO2 may reduce this injury.

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Area of Science:

  • Nephrology
  • Physiology
  • Pathology

Background:

  • Surgically created remnant kidneys in rats and dogs show progressive tubulointerstitial scarring.
  • This scarring occurs alongside significant kidney hypertrophy and increased oxygen consumption per nephron.

Purpose of the Study:

  • To present a novel hypothesis for progressive kidney injury in reduced renal mass.
  • To review data supporting the "hypermetabolism" hypothesis and examine underlying analytical frameworks.

Main Methods:

  • Observations in surgically created remnant kidneys of rat and dog models.
  • Review and analysis of existing data on renal oxygen consumption and injury.

Main Results:

  • Remnant kidneys exhibit hypertrophy with increased oxygen consumption (QO2) per nephron, not per tissue mass.

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  • This "hypermetabolism" correlates with progressive tubulointerstitial scarring.

    • Conclusions:

    • Increased QO2 in remnant kidneys may drive cellular damage via oxygen-reactive species production.
    • Further research is needed to answer outstanding questions regarding this kidney injury pathway.