Using well-plate microfluidic devices to conduct shear-based thrombosis assays

Area of Science:

• Biomedical Engineering
• Hematology
• Microfluidics

Background:

• Platelet adhesion and thrombus formation are critical processes regulated by shear stress in vascular injury.
• Current in vitro methods for platelet analysis under shear flow, such as cone and plate viscometers and parallel plate perfusion chambers, have limitations in throughput, sample volume, and experimental condition control.

Purpose of the Study:

• To present a novel microfluidic system for comprehensive platelet analysis under controlled shear flow conditions.
• To demonstrate the system's utility in studying thrombus formation on biomatrices and evaluating antiplatelet drug efficacy.
• To highlight the advantages of the microfluidic approach over conventional methods for platelet research.

Main Methods:

• Development and application of a microfluidic system for platelet analysis under shear flow.
• Investigation of thrombus formation on collagen I and von Willebrand factor substrates.
• Dose-response analysis of the antiplatelet compound Abciximab under shear flow conditions.

Main Results:

• The microfluidic system successfully enabled real-time assessment of platelet thrombus formation on defined substrates.
• The system facilitated dose-dependent evaluation of Abciximab's antiplatelet activity.
• The microfluidic approach allowed simultaneous assessment of up to 24 conditions with identical physical parameters and minimal donor blood volume.

Conclusions:

• The presented microfluidic system offers significant advantages for platelet function analysis under shear stress compared to traditional methods.
• This technology enhances throughput, reproducibility, and efficiency in studying platelet adhesion, thrombus formation, and drug responses.
• The system's ability to use low sample volumes makes it ideal for clinical applications and personalized medicine approaches.