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Plasmatic antiproteinase activity enhancement by insoluble functionalized polystyrene surfaces
S Charef1, M Jozefowicz, D Labarre
1Laboratoire de Recherches sur les Macromolécules, CNRS UA 502, Université Paris-Nord, Villetaneuse, France.
Biomaterials
|August 1, 1990
Summary
New polymer surfaces show promise for preventing blood clots. Certain amino acid sulphamide derivatives of polystyrene enhance key protein interactions, suggesting potential for antithrombogenic medical devices.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Hemostasis
Background:
- Antithrombogenic polymer surfaces are crucial for blood-contacting medical devices.
- Heparin and sulfonated polystyrene derivatives are known for their anticoagulant properties.
- Understanding the mechanisms of these surfaces is vital for improving biocompatibility.
Purpose of the Study:
- To investigate the antithrombogenic properties of novel polymer surfaces.
- To compare the catalytic effects of different functional groups on blood coagulation factors.
- To explore the potential of amino acid sulphamide derivatives for antithrombogenic applications.
Main Methods:
- Grafting heparin onto polymer surfaces.
- Substituting insoluble polystyrene with sulphonate and amino acid sulphamide groups.
- Assessing the catalytic effects on antithrombin III-thrombin and heparin cofactor II complex formation.
Main Results:
- Amino acid sulphamide polystyrene derivatives strongly potentiate heparin cofactor II and antithrombin III.
- Insoluble polystyrene sulphonate and heparin copolymer primarily catalyze antithrombin III.
- Different surface chemistries exhibit distinct interactions with coagulation factors.
Conclusions:
- Amino acid sulphamide groups show significant potential for developing effective antithrombogenic surfaces.
- Surface conformation likely influences the differential catalytic activities observed.
- These findings support the use of amino acid sulphamide derivatives in blood-contacting biomaterials.