Two-photon intravital imaging of thrombus development

Area of Science:

• Vascular biology
• Biomedical imaging
• Hemodynamics

Background:

• Thrombus formation is a complex process involving platelets and fibrin.
• Understanding thrombus development is crucial for treating thrombotic diseases.
• Current methods have limitations in visualizing dynamic thrombus growth in vivo.

Purpose of the Study:

• To visualize and quantify thrombus development in mouse mesenteric vessels in near real-time.
• To investigate the role of hemodynamics and cell incorporation in thrombus structure.
• To identify novel mechanisms regulating thrombus growth.

Main Methods:

• High-resolution, two-photon intravital microscopy was employed.
• Fluorescently tagged fibrinogen, platelets, and plasma dextran were used for labeling.
• Image processing algorithms and simulations quantified structural features.

Main Results:

• Near real-time visualization of thrombus development was achieved.
• Blood flow perturbation near the thrombus surface was observed.
• Heterogeneous thrombus structures formed due to hemodynamic effects and cell incorporation.

Conclusions:

• Dynamic imaging revealed complex thrombus development influenced by flow and cell dynamics.
• A novel mechanism for inhibiting thrombus growth was suggested.
• This approach provides new insights into thrombus formation and potential therapeutic targets.