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Updated: Jun 26, 2026
06:12
A Comprehensive Approach to Analyze the Cell Components of Cerebral Blood Clots
Published on: July 21, 2023
[Cell-derived microparticles unveil their fibrinolytic and proteolytic function].
Loïc Doeuvre1, Eduardo Angles-Cano
1Inserm U919, Sérine Protéases et Physiopathologie de l'Unité neurovasculaire, CiNaps, UMR CNRS 6232, GIP Cyceron, boulevard Henri Becquerel, 14074 Caen Cedex, France.
Medecine Sciences : M/S
|January 22, 2009
Summary
Cell-derived microparticles (MPs) are tiny vesicles shed by cells. These MPs have procoagulant and profibrinolytic functions, impacting thrombotic risk and cell processes.
Area of Science:
- Biochemistry
- Cell Biology
- Pathology
Context:
- Cell-derived microparticles (MPs) are membrane vesicles shed during cell activation or apoptosis.
- MPs from blood and endothelial cells carry molecular signatures and tissue factor (TF).
- Their procoagulant activity is a key factor in thrombotic risk assessment.
Purpose:
- To investigate the profibrinolytic and proteolytic functions of cell-derived microparticles.
- To characterize the role of urokinase plasminogen activator (uPA)/uPAR system on MPs in plasmin generation.
- To explore the implications of MP-associated plasmin generation in various physiological and pathological processes.
Summary:
- MPs, particularly those from malignant cells, express matrix metalloproteinases and uPA/uPAR.
- MPs from TNFa-stimulated endothelial cells facilitate plasminogen conversion to plasmin via the uPA/uPAR system.
- This indicates a novel profibrinolytic and proteolytic role for MPs.
Impact:
- MPs contribute to fibrinolysis, cell migration, angiogenesis, and cancer cell dissemination.
- Understanding MP functions offers insights into thrombotic risk and cancer progression.
- This research highlights a new proteolytic capacity of MPs with broad biological relevance.
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