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Intravital Microscopy of Leukocyte-endothelial and Platelet-leukocyte Interactions in Mesenterial Veins in Mice
05:12

Intravital Microscopy of Leukocyte-endothelial and Platelet-leukocyte Interactions in Mesenterial Veins in Mice

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Platelet-monocyte aggregates in patients with chronic venous insufficiency remain elevated following correction of

Michael J Rohrer1, R Brannon Claytor, Charles S C Garnette

  • 1Division of Vascular Surgery and the Center for Platelet Function Studies, The University of Massachusetts Medical School, 55 Lake Avenue, North Worcester 01655, USA. RohrerM@ummhc.org

Cardiovascular Surgery (London, England)
|October 16, 2002
PubMed
Abstract

Insights

Elevated platelet-monocyte aggregates (PMAs) persist after chronic venous insufficiency (CVI) surgery. This suggests PMAs may contribute to the primary cause of CVI, not just venous reflux.

Area of Science:

  • Vascular Medicine
  • Hematology
  • Immunology

Background:

  • Elevated circulating platelet-monocyte aggregates (PMAs) are observed in all chronic venous insufficiency (CVI) patients.
  • The role of PMAs after surgical correction of CVI requires investigation.

Purpose of the Study:

  • To determine if elevated PMA levels in CVI patients decrease after surgical correction.
  • To investigate the relationship between PMAs and venous reflux in CVI.

Main Methods:

  • Flow cytometry was used to quantify PMAs in blood samples from CVI patients and controls.
  • Blood was collected before and six weeks after superficial vein stripping surgery.
  • Adenosine diphosphate (ADP) was used to stimulate PMA formation.

Main Results:

  • Preoperatively, CVI patients had significantly higher PMA levels than controls, both unstimulated and ADP-stimulated.
  • Postoperative duplex scans confirmed successful elimination of venous reflux.
  • No significant reduction in PMA levels was observed six weeks after surgery.

Conclusions:

  • Surgical correction of CVI does not reduce elevated circulating PMA levels.
  • Increased PMAs in CVI may be a primary etiological factor, not solely a consequence of venous reflux.
  • Leukocyte activation in CVI might be triggered by factors beyond venous hypertension.

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