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Published on: January 31, 2018
Bench-to-bedside review: circulating microparticles--a new player in sepsis?
Ferhat Meziani1, Xavier Delabranche, Pierre Asfar
1Service de réanimation médicale, Nouvel Hôpital Civil, Hôpitaux universitaires de Strasbourg, F-67091 Strasbourg, France. Ferhat.Meziani@chru-strasbourg.fr
Critical Care (London, England)
|November 12, 2010
Summary
Microparticles, cell fragments involved in inflammation and clotting, play a key role in sepsis. These bioactive particles contribute to organ dysfunction in septic shock by promoting inflammation and blood coagulation.
Area of Science:
- Biochemistry
- Cell Biology
- Pathophysiology
Background:
- Sepsis involves complex interactions between circulating cells, endothelial cells, and smooth muscle cells, leading to inflammation and thrombosis.
- Microparticles are bioactive fragments from activated cell membranes, released into bodily fluids and acting as intercellular messengers.
Purpose of the Study:
- To investigate the role of microparticles in the pathogenesis of sepsis.
- To understand how microparticles contribute to the multiple organ dysfunction observed in septic shock.
Main Methods:
- Analysis of microparticle composition and function.
- Assessment of microparticle-mediated effects on vascular tone, inflammation, and coagulation.
Main Results:
- Microparticles expose phosphatidylserine and tissue factor, initiating blood coagulation.
- They act as a secretion pathway for IL-1β, enhancing proinflammatory responses.
- Microparticles are potent vascular proinflammatory and procoagulant mediators, regulating vascular tone.
Conclusions:
- Microparticles are implicated in the pathogenesis of sepsis through their proinflammatory and procoagulant activities.
- Understanding microparticle function is crucial for deciphering the mechanisms of septic shock and multiple organ dysfunction.
