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Related Experiment Videos

Neutrophils and renal failure.

M Heinzelmann1, M A Mercer-Jones, J C Passmore

  • 1The Price Institute of Surgical Research, University of Louisville School of Medicine, Louisville, KY, USA. mheinzelmann@bluewin.ch

American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation
|August 4, 1999
PubMed
Summary

Neutrophils release damaging agents in kidney disease, with reactive oxygen intermediates and proteases synergizing to cause tissue injury. This process, amplified by kidney factors and adhesion molecules, contributes to renal failure.

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Area of Science:

  • Nephrology
  • Immunology
  • Pathology

Background:

  • Neutrophils release enzymes and reactive oxygen intermediates (ROIs) that damage tissues during inflammation.
  • Kidney-specific factors can exacerbate neutrophil-mediated tissue destruction.
  • ROIs and neutrophil proteases synergistically contribute to glomerular pathophysiology and renal failure.

Purpose of the Study:

  • To review the mechanisms of neutrophil-driven tissue destruction in kidney diseases.
  • To highlight the role of kidney-specific factors in promoting this damage.
  • To discuss the interplay between neutrophils, ROIs, proteases, and adhesion molecules in renal injury.

Main Methods:

  • Literature review of studies on neutrophil function in kidney disease.
  • Analysis of the biochemical pathways involved in neutrophil-mediated tissue damage.

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  • Examination of the role of specific molecules like NADPH oxidase, MPO, interleukins, and adhesion molecules.

    • Main Results:

    • NADPH oxidase generates ROIs that alter glomerular function and morphology.
    • Neutrophil granules contain proteases and peptides that degrade extracellular matrix and harm cells.
    • Synergism between ROIs and neutrophil proteases, particularly myeloperoxidase, leads to significant tissue damage.
    • Chemotactic substances (e.g., interleukin 8) and adhesion molecules (e.g., ICAM-1, beta-2-integrins) promote neutrophil migration and activation, correlating with injury severity.
    • Chronic renal failure impairs neutrophil function, increasing infection risk.

    Conclusions:

    • Neutrophils and their released factors are key mediators of tissue injury in various kidney diseases.
    • The synergistic action of ROIs and proteases, along with adhesion molecules, drives renal failure.
    • Understanding these mechanisms is crucial for developing targeted therapies for kidney injury.