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Modelling of thrombus growth in flow with a DPD-PDE method
A Tosenberger1, F Ataullakhanov2, N Bessonov3
1Institut Camille Jordan, UMR 5208 CNRS, University Lyon 1, 69622 Villeurbanne, France; INRIA Team Dracula, INRIA Antenne Lyon la Doua, 69603 Villeurbanne, France.
Blood clot growth, essential for healing, is modeled using a hybrid DPD-PDE approach. Simulations reveal how flow dynamics and fibrin formation regulate hemostatic plug size and arrest clot growth.
Area of Science:
- Biophysics
- Computational Biology
- Hematology
Background:
- Hemostatic plug formation involves platelet aggregation and blood coagulation.
- Mechanisms controlling clot growth and arrest are not fully understood.
Purpose of the Study:
- To model and understand the mechanisms of hemostatic plug growth and arrest.
- To investigate the role of flow dynamics and fibrin formation in clot regulation.
Main Methods:
- Numerical simulations using a hybrid Dissipative Particle Dynamics (DPD) and Partial Differential Equation (PDE) model.
- DPD models plasma flow with platelets; PDE models fibrin concentration.
- Simulations consider sequential stages of clot growth and platelet-fibrin interactions.
Main Results:
- Platelet adhesion strengthens over time via surface receptors.
- Fibrin mesh formation within the clot is facilitated by lack of flow penetration.
- Clot growth arrest can occur when flow removes the exterior, exposing a non-adhesive core.
Conclusions:
- The hybrid DPD-PDE model provides insights into hemostatic plug growth dynamics.
- Flow-induced erosion of the clot exterior can lead to growth arrest.
- Understanding these mechanisms is crucial for pathological thrombus formation and therapeutic interventions.
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