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Related Experiment Videos

Haemodialyser biocompatibility and erythrocyte structure and function

M R Martos1, B M Hendry, M Rodríguez-Puyol

  • 1Department of Physiology, University of Alcalá de Henares, Spain.

Clinica Chimica Acta; International Journal of Clinical Chemistry
|January 31, 1998
PubMed
Summary

Polyacrylonitrile (PAN) hemodialysis improves erythrocyte structural integrity compared to cuprophane (CU) dialysis. PAN HD significantly reduces erythrocyte osmotic fragility and cholesterol levels, suggesting better biocompatibility for dialysis membranes.

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Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association·2013

Area of Science:

  • Nephrology
  • Biomaterials Science
  • Hematology

Background:

  • Controversy exists regarding the clinical significance of biocompatible versus non-biocompatible hemodialysis (HD) membranes.
  • Erythrocyte structural and functional properties may be affected by dialysis membrane type.

Purpose of the Study:

  • To examine the effects of biocompatible (polyacrylonitrile, PAN) and non-biocompatible (cuprophane, CU) membranes on human erythrocyte properties during acute and chronic HD.
  • To compare the impact of PAN and CU membranes on erythrocyte osmotic fragility, cholesterol, and key protein components.

Main Methods:

  • Studied 27 HD patients, comparing acute and chronic HD sessions using PAN and CU membranes.
  • Assessed erythrocyte osmotic fragility (OF), cell cholesterol, malonyldialdehyde (MDA), reduced glutathione (GSH), and structural proteins (spectrin, band 3, ankyrin, actin).

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Main Results:

  • Both acute and chronic HD increased erythrocyte osmotic fragility compared to controls.
  • Acute PAN HD significantly reduced OF and cholesterol more than acute CU HD.
  • Chronic PAN HD maintained reduced OF compared to chronic CU HD, with no significant differences in MDA or major structural proteins between PAN and CU groups in chronic settings.

Conclusions:

  • PAN HD demonstrates improved biocompatibility over CU HD, preserving erythrocyte structural integrity.
  • The observed benefits of PAN HD are not clearly attributable to major changes in structural proteins, oxidation status, or ionic homeostasis.