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Related Experiment Videos

Intraglomerular platelet aggregation and experimental glomerulonephritis.

K Poelstra1, M J Hardonk, J Koudstaal

  • 1Department of Pathology, University of Groningen, The Netherlands.

Kidney International
|June 1, 1990
PubMed
Summary

Oxygen free radicals from inflammatory cells reduce glomerular ADPase activity, impairing its antithrombotic action and promoting thrombus formation in glomerulonephritis. Antioxidant treatment improved these effects.

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Area of Science:

  • Nephrology
  • Immunology
  • Biochemistry

Background:

  • Glomerulonephritis (GN) involves inflammatory cell influx and thrombus formation.
  • Glomerular ADPase has antithrombotic properties but is sensitive to oxygen free radicals.

Purpose of the Study:

  • To investigate if oxygen free radical-producing inflammatory cells cause intraglomerular thrombosis by impairing ADPase activity in GN models.

Main Methods:

  • Examined inflammatory cell influx, glomerular ADPase activity, and platelet aggregation in three rat GN models.
  • Assessed the effects of superoxide dismutase and catalase treatment.
  • Studied ex vivo effects of activated neutrophils on glomerular ADPase.

Main Results:

  • A correlation was found between oxygen free radical-producing cell influx, reduced glomerular ADPase activity, and increased platelet aggregation in anti-Thy1 and anti-GBM GN models.

Related Experiment Videos

  • Superoxide dismutase and catalase treatment mitigated ADPase impairment and platelet aggregation.
  • Activated neutrophils directly reduced glomerular ADPase activity in an oxygen-dependent manner.

    • Conclusions:

    • Oxygen free radicals produced by activated neutrophils impair glomerular ADPase activity, facilitating thrombus formation in experimental glomerulonephritis.
    • Targeting oxygen free radical production may offer a therapeutic strategy for GN-associated thrombosis.