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Related Experiment Videos

Hydrogen peroxide induces endothelial cell atypia and cytoskeleton depolymerization.

G Valen1, A Sondén, J Vaage

  • 1Department of Thoracic Surgery, Karolinska Hospital, Stockholm, Sweden. guro.valen@cmm.ki.se

Free Radical Biology & Medicine
|July 13, 1999
PubMed
Summary

High hydrogen peroxide (H2O2) concentrations cause reversible changes in human umbilical cord vein endothelial cells (HUVECs), including cell contraction and cytoskeletal disruption, but not necrosis or Factor VIII alterations.

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Area of Science:

  • Cell Biology
  • Endothelial Cell Research
  • Oxidative Stress Studies

Background:

  • Reactive oxygen intermediates are implicated in various pathophysiological conditions.
  • Understanding oxidative stress effects on endothelial cells is crucial for disease research.

Purpose of the Study:

  • To investigate the effects of hydrogen peroxide (H2O2) on human umbilical cord vein endothelial cells (HUVECs).
  • To assess H2O2-induced changes in cell morphology, cytoskeletal structure, and Factor VIII expression.

Main Methods:

  • HUVEC cultures were exposed to 1 or 200 microM H2O2.
  • Immunocytochemistry was used to visualize Factor VIII, vimentin, and tubulin.
  • Lactate dehydrogenase release was measured as an indicator of cell membrane injury.

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Main Results:

  • 200 microM H2O2 induced transient cell contraction and cytoskeletal protein depolymerization, followed by delayed contraction and multinucleated giant cells.
  • No significant increase in lactate dehydrogenase release or alteration in Factor VIII expression was observed.
  • 1 microM H2O2 did not induce any observable changes in HUVECs.
  • Catalase treatment abolished all H2O2-induced effects.

Conclusions:

  • H2O2 at 200 microM causes reversible endothelial cell alterations, including cytoskeletal disruption and cell atypia, but not necrosis.
  • Factor VIII expression and cell membrane integrity remain unaffected at the tested concentrations.
  • These findings provide insights into the specific cellular responses to oxidative stress in endothelial cells.