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Related Experiment Video

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Surface-adhering Human Leucocytes: An In Vitro Model for Cytotoxicity Testing of Fluids.

H Nygren1, M Braide1, C Eriksson1

  • 1Applied Cell Biology, Institute of Anatomy and Cell Biology, University of Göteborg, P.O. Box 420, 40530, Göteborg, Sweden.

Alternatives to Laboratory Animals : ATLA
|November 25, 2014
PubMed
Summary
This summary is machine-generated.

A new method rapidly screens toxic effects of fluids on immune cells. This research assessed peritoneal dialysis fluids, finding that low pH and heat sterilization inhibit critical cell functions, potentially increasing infection risk.

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Area of Science:

  • Immunology
  • Biomaterials Science
  • Toxicology

Background:

  • Peritoneal dialysis (PD) fluids can impact polymorphonuclear neutrophils (PMNLs) function.
  • Impaired PMNL respiratory burst response reduces bacterial killing capacity, increasing infection risk.
  • A rapid, reliable method is needed to assess the cytotoxicity of PD fluids on PMNLs.

Purpose of the Study:

  • To develop and validate a rapid screening method for assessing fluid toxicity on PMNL respiratory burst.
  • To evaluate the cytotoxic effects of peritoneal dialysis fluids using this novel method.
  • To compare results with traditional methods using isolated circulating and dwell fluid cells.

Main Methods:

  • Developed a method using whole capillary blood on titanium substrates to culture adhering PMNLs.
  • Characterized adhering leukocytes via immunofluorescence, confirming >95% PMNLs.
  • Assessed NADPH-oxidase activity (respiratory burst) stimulated by f-MLP and zymosan as a cytotoxicity indicator.

Main Results:

  • Down-regulation of selectin and integrin expression observed on adhering PMNLs over time.
  • Zymosan-induced NADPH-oxidase activity showed a lag phase, correlating with integrin expression.
  • PD fluids with pH 5.7 and heat-sterilized PD fluids significantly inhibited NADPH-oxidase activity.

Conclusions:

  • The developed method provides a rapid and effective screening tool for PD fluid cytotoxicity.
  • Low pH and heat sterilization in PD fluids can impair PMNL respiratory burst function.
  • This assay has implications for patient safety and optimizing PD fluid formulations.