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Real-time Imaging of Heterotypic Platelet-neutrophil Interactions on the Activated Endothelium During Vascular Inflammation and Thrombus Formation in Live Mice
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Increased platelet reactivity is associated with circulating platelet-monocyte complexes and macrophages in human

Bert Rutten1, Claudia Tersteeg2, Joyce E P Vrijenhoek3

  • 1Laboratory of Clinical Chemistry and Hematology, University Medical Center Utrecht, Utrecht, the Netherlands.

Plos One
|August 15, 2014
PubMed

Insights

Increased platelet reactivity correlates with higher levels of platelet-monocyte complexes and macrophages in atherosclerotic plaques, suggesting a link between platelet activation and disease progression.

Area of Science:

  • Cardiovascular Biology
  • Immunology
  • Atherosclerosis Research

Background:

  • Platelet activation, monocyte binding, and infiltration are key drivers of atherosclerotic plaque development.
  • Understanding the interplay between platelets and monocytes is crucial for targeting atherosclerosis.

Purpose of the Study:

  • To investigate the association between platelet reactivity and circulating platelet-monocyte complexes (PMCs).
  • To determine if platelet reactivity correlates with macrophage levels within human atherosclerotic carotid plaques.

Main Methods:

  • Platelet reactivity was measured via P-selectin expression after adenosine diphosphate (ADP) stimulation in two cohorts.
  • Circulating PMCs were assessed using flow cytometry.
  • Macrophage infiltration in carotid plaques was evaluated through histological analysis.

Main Results:

  • Higher platelet reactivity was observed in patients with elevated PMCs (P<0.001).
  • Increased platelet reactivity was also associated with higher macrophage levels in atherosclerotic plaques (P=0.02).
  • These associations remained significant after adjusting for clinical factors.

Conclusions:

  • Platelet reactivity to ADP is significantly associated with circulating platelet-monocyte complexes.
  • Elevated platelet reactivity correlates with increased macrophage infiltration in human atherosclerotic carotid plaques.
Abstract

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