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Related Experiment Video

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Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
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Published on: December 24, 2014

Polymer Brushes Containing Sulfonated Sugar Repeat Units: Synthesis, Characterization and In Vitro Testing of Blood

N Ayres1, D J Holt, C F Jones

  • 1Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112-5820 USA.

Journal of Polymer Science. Part A, Polymer Chemistry
|October 28, 2009
PubMed
Summary

Researchers developed a new sulfonated polymer brush mimicking heparin for blood-contacting surfaces. This advanced material demonstrated superior blood compatibility in vitro compared to its unsulfonated counterpart.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Surface Chemistry

Background:

  • Heparin, a sulfonated glycosaminoglycan, is crucial for modifying blood-contacting surfaces to enhance biocompatibility.
  • Developing synthetic mimics of heparin is essential for advanced biomedical applications.
  • Existing surface modification strategies require optimization for improved hemocompatibility.

Purpose of the Study:

  • To synthesize and characterize a novel polymer brush with sulfonated carbohydrate units.
  • To evaluate the in vitro blood compatibility of the new sulfonated polymer brush.
  • To compare the performance of the sulfonated polymer brush against an unsulfonated control surface.

Main Methods:

  • Synthesis of polymer brushes on silicon substrates via atom transfer radical polymerization (ATRP).
  • Characterization of the polymer brush chemistry using bulk and surface analysis techniques.
  • Assessment of blood compatibility using plasma recalcification times, complement activation, and thrombin generation assays.

Main Results:

  • Successful synthesis and surface analysis confirmed the conversion to sulfonated polymer brush.
  • The sulfonated polymer brush exhibited enhanced performance in all tested in vitro blood compatibility assays.
  • Significant improvements in blood component assay performance were observed compared to the unsulfonated polymer brush.

Conclusions:

  • The novel sulfonated polymer brush shows promise as a heparin mimic for blood-contacting surfaces.
  • This material offers improved in vitro blood compatibility, potentially reducing thrombotic events.
  • Further investigation into in vivo performance is warranted for clinical translation.