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[Chiparray-based identification of gene expression in HUVECs treated with low frequency electric fields].

D Ulrich1, F Ulrich, J Silny

  • 1Klinik für Plastische Chirurgie, Hand- und Verbrennungschirurgie, Universitätsklinikum Aachen, Germany. dietmar.ulrich@post.rwth-aachen.de

Handchirurgie, Mikrochirurgie, Plastische Chirurgie : Organ Der Deutschsprachigen Arbeitsgemeinschaft Fur Handchirurgie : Organ Der Deutschsprachigen Arbeitsgemeinschaft Fur Mikrochirurgie Der Peripheren Nerven Und Gefasse : Organ Der V
|August 3, 2006
PubMed
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Low-frequency electrical fields alter gene expression in human umbilical vein endothelial cells (HUVECs), promoting a hypercoagulated state. This may explain tissue damage and blood clots observed after electrical injuries.

Area of Science:

  • Biomedical Engineering
  • Molecular Biology
  • Vascular Biology

Background:

  • High-voltage electrical injuries can cause severe tissue necrosis and thrombosis.
  • Previous research indicated that electrical injuries lead to the release of prothrombotic factors.
  • Understanding the cellular mechanisms is crucial for treating electrical trauma.

Purpose of the Study:

  • To investigate the impact of low-frequency electrical fields on gene expression profiles in human umbilical vein endothelial cells (HUVECs).
  • To characterize the specific genes and pathways affected by electrical current exposure in vitro.
  • To correlate observed gene expression changes with clinical manifestations of electrical injury.

Main Methods:

  • Human umbilical vein endothelial cells (HUVECs) were exposed to controlled 50 Hz electrical fields (60 V/cm, 100 ms pulses).

Related Experiment Videos

  • Gene expression analysis was performed using a DNA-microarray (PIQOR Immunology Array) containing 1076 cDNAs.
  • Samples were collected at 6 and 24 hours post-exposure, with gene expression changes quantified and normalized.

    • Main Results:

    • A significant number of genes (413 at 6h, 345 at 24h) showed altered expression levels.
    • Upregulation of genes critical for hemostasis (e.g., PAI1, VWF, F3) was observed, suggesting a hypercoagulable state.
    • Reduced expression of angiogenesis-related genes and increased expression of platelet formation genes were noted.

    Conclusions:

    • Low-frequency electrical fields induce a distinct gene expression signature in HUVECs.
    • The observed gene expression changes, particularly those related to hemostasis, may underlie the thrombosis and tissue necrosis seen after electrical injuries.
    • This study provides molecular insights into the pathophysiology of electrical trauma.