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[Microparticles during sepsis and trauma. A link between inflammation and thrombotic processes]

N Morel1, O Morel, X Delabranche

  • 1Service d'urgences et de réanimation chirurgicale, hôpital Pellegrin, Bordeaux, France.

Annales Francaises D'Anesthesie Et De Reanimation
|August 24, 2006
PubMed

Insights

Sepsis and trauma activate cells, releasing microparticles (MPs) that promote blood clotting and thrombin generation. These MPs, rich in tissue factor, are implicated in initiating disseminated intravascular coagulopathy.

Area of Science:

  • Vascular biology
  • Hemostasis
  • Cellular signaling

Context:

  • Sepsis and trauma induce sustained monocyte and endothelial activation.
  • Activated cells release microparticles (MPs) into the vascular compartment.
  • Circulating MPs offer a procoagulant phospholipid surface for clotting enzyme complex assembly.

Purpose:

  • To investigate the role of microparticles in coagulation.
  • To understand the procoagulant properties of MPs.
  • To explore the contribution of MPs to disseminated intravascular coagulopathy.

Summary:

  • MPs expose phosphatidylserine and can carry tissue factor (TF), the primary initiator of coagulation.
  • MPs are a major source of blood-borne TF activity.
  • TF-bearing MPs at injury sites can concentrate TF activity, triggering blood coagulation.
  • Evidence links TF-bearing MPs to the initiation of disseminated intravascular coagulopathy.

Impact:

  • Highlights the critical role of MPs in thrombosis and hemostasis.
  • Suggests MPs as potential therapeutic targets.
  • Pharmacological modulation of MPs may offer new treatment strategies for coagulopathies.

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