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Related Experiment Videos

Platelet-leukocyte aggregation during hemodialysis

M P Gawaz1, S K Mujais, B Schmidt

  • 1Nephrology Department, Klinikum Grosshadern, University of Munich, Germany.

Kidney International
|August 1, 1994
PubMed
Summary

Hemodialysis causes increased platelet-leukocyte aggregation, particularly platelet-neutrophil and platelet-monocyte microaggregates. This suggests a primary platelet activation mechanism during dialysis, potentially impacting biocompatibility.

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Area of Science:

  • Nephrology
  • Hematology
  • Biomaterials Science

Background:

  • Hemodialysis (HD) involves simultaneous changes in leukocytes and platelets.
  • The interaction between these cell types during HD remains unclear.
  • Platelet-leukocyte aggregation is a potential indicator of cellular interaction during HD.

Purpose of the Study:

  • To evaluate platelet-leukocyte aggregation during hemodialysis.
  • To assess the role of synthetic membranes in these interactions.
  • To investigate platelet activation as a mechanism for aggregation.

Main Methods:

  • Flow cytometry and platelet-specific monoclonal antibodies (anti-CD41, anti-LIBS1, anti-CD62) were used.
  • Patients with end-stage renal disease (ESRD) on long-term HD were studied.

Related Experiment Videos

  • Platelet-leukocyte microaggregates were quantified predialysis and during HD across dialyzers.

    • Main Results:

    • ESRD patients showed lower predialysis platelet expression of CD41 and LIBS1 compared to controls.
    • Predialysis platelet-leukocyte microaggregates were reduced in ESRD patients.
    • HD induced an increase in platelet-neutrophil and platelet-monocyte microaggregates with all synthetic membranes tested.

    Conclusions:

    • Platelet-leukocyte aggregates form during hemodialysis, likely due to primary platelet activation.
    • This aggregation can be triggered by platelet agonists like ADP.
    • Platelet-leukocyte aggregation may serve as a novel biocompatibility parameter for hemodialysis membranes.