Is the endothelial cell responsible for the thrombus core and shell architecture?

Area of Science:

• Cardiovascular Science
• Hematology
• Biophysics

Background:

• Ischemic events like heart attacks and strokes are leading global causes of death.
• Blood clot architecture, particularly the core-and-shell structure, is not fully understood.
• Endothelial cell rupture is a key event in thrombosis.

Purpose of the Study:

• To investigate the role of intracellular material from ruptured endothelial cells in blood clot formation.
• To propose a model for thrombus core development and platelet recruitment.
• To offer potential therapeutic targets for ischemic diseases and hemophilia.

Main Methods:

• Fluid dynamic modeling to assess platelet agonist transport.
• Intravital microscopy to observe clot architecture and endothelial injury.
• Mechanistic illustration of platelet recruitment and injury sealing.

Main Results:

• Platelet agonists cannot effectively activate platelets within the thrombus core due to counter-flow.
• Visual evidence suggests the thrombus core originates from intracellular material of damaged endothelium.
• A mechanism for platelet recruitment and injury sealing has been proposed.

Conclusions:

• Intracellular endothelial material is a likely contributor to the heterogeneous core of blood clots.
• The proposed model enhances understanding of thrombus formation in cardiovascular events.
• This research may inform novel therapeutic strategies for heart attacks, strokes, and hemophilia.