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Updated: May 12, 2026
08:50
Thrombus Profiling Assay: A Microfluidics-Based Platform for Comprehensively Characterizing Biomechanical Thrombogenesis
Published on: January 9, 2026
A biologically active surface enzyme assembly that attenuates thrombus formation
Zheng Qu1, Sharmila Muthukrishnan, Murali K Urlam
1Departments of Biomedical Engineering and Surgery, Georgia Institute of Technology and Emory University Atlanta, GA 30322 (USA).
Advanced Functional Materials
|March 28, 2013
Summary
Reconstituting thrombomodulin (TM) on artificial surfaces reduces blood clot formation. This bioengineering approach enhances the biocompatibility of medical implants by limiting thrombus formation on blood-contacting materials.
Area of Science:
- Biomaterials Science
- Biochemistry
- Medical Engineering
Background:
- Blood-contacting materials activate hemostatic pathways, hindering the development of durable artificial organs and implants.
- Surface-induced thrombosis is a significant challenge for implantable medical devices.
- Thrombin, a key mediator of clotting and platelet activation, is central to these hemostatic pathways.
Purpose of the Study:
- To investigate the potential of surface-bound thrombomodulin (TM) to attenuate surface-induced thrombosis.
- To develop a method for site-specifically immobilizing biologically active TM onto prosthetic vascular grafts.
- To evaluate the bioactivity, biostability, and antithrombotic efficacy of TM-modified grafts.
Main Methods:
- Utilized molecular engineering and bioorthogonal chemistry for site-specific immobilization of a recombinant human TM fragment.
- Immobilized TM onto the luminal surface of small diameter prosthetic vascular grafts.
- Confirmed bioactivity and biostability of TM-modified grafts in vitro.
- Assessed the capacity of modified grafts to reduce platelet activation in a non-human primate model.
Main Results:
- Successfully immobilized biologically active recombinant human TM onto vascular graft surfaces.
- Demonstrated the bioactivity and biostability of the surface-immobilized TM in vitro.
- Showcased reduced platelet activation on TM-modified grafts in a non-human primate model.
- Confirmed that engineered interfaces displaying TM actively limit surface-induced thrombus formation.
Conclusions:
- Molecularly engineered interfaces displaying thrombomodulin can effectively limit surface-induced thrombus formation.
- This approach offers a promising strategy for enhancing the biocompatibility and clinical durability of blood-contacting medical devices.
- Site-specific immobilization of bioactive enzymes presents an effective method for mitigating adverse hemostatic responses to implants.
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