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Endothelial cell function alteration after Junin virus infection.

Ricardo Martin Gomez1, Roberto Gabriel Pozner, Maria Angela Lazzari

  • 1Department of Microbiology, Faculty of Medicine, University of Buenos Aires, CONICET, Argentina.

Thrombosis and Haemostasis
|July 31, 2003
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Summary
This summary is machine-generated.

Argentine hemorrhagic fever (AHF) involves Junin virus (JV) impacting blood clotting. This study shows JV infects endothelial cells, altering key proteins and signaling molecules, contributing to AHF

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Area of Science:

  • Virology
  • Immunology
  • Cell Biology

Background:

  • Argentine hemorrhagic fever (AHF) is an endemic disease caused by Junin virus (JV).
  • Endothelial dysfunction is implicated in the hemostasis alterations observed in AHF.
  • Understanding viral interactions with endothelial cells is crucial for elucidating disease pathogenesis.

Purpose of the Study:

  • To investigate the effects of Junin virus (JV) infection on human umbilical vein endothelial cells (HUVECs).
  • To compare the responses of HUVECs to virulent (JVv) and non-virulent (JVa) JV strains.
  • To determine the role of endothelial cell alterations in the pathogenesis of Argentine hemorrhagic fever (AHF).

Main Methods:

  • Infection of HUVECs with JVv and JVa strains.
  • Analysis of ICAM-1, VCAM-1, and von Willebrand factor (VWF) expression.
  • Measurement of prostacyclin (PGI2), nitric oxide (NO) production, and endothelial nitric oxide synthase (eNOS) expression.

Main Results:

  • JV infection did not induce apoptosis or cytopathic effects in HUVECs.
  • Both JV strains upregulated ICAM-1 and VCAM-1, while decreasing VWF production.
  • JVv infection led to increased PGI2 release, DAF expression, NO production, and eNOS expression compared to JVa or control cells.
  • Elevated NO and PGI2 levels were detected in AHF patient sera.

Conclusions:

  • Junin virus infection triggers specific endothelial cell responses.
  • These virus-induced endothelial cell alterations are likely significant contributors to AHF pathogenesis.
  • The findings may offer insights into other viral hemorrhagic diseases involving endothelial dysfunction.