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Related Experiment Videos

Complement activation by substituted polyacrylamide hydrogels for embolisation and implantation.

Denis Labarre1, Alexandre Laurent, André Lautier

  • 1Laboratoire de Biomatériaux et Polymères, CNRS UMR 8612, Physio-Chimie, Pharmacotechine, Biopharmacie, Université Paris Sud-XI, Châtenay-Malabry, France. denis.labarre@cep.u-psud.fr

Biomaterials
|May 16, 2002
PubMed
Summary
This summary is machine-generated.

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Trisacryl hydrogel microspheres cause less complement activation than other materials, indicating their potential to reduce inflammatory reactions during therapeutic embolisation. Surface properties and functional groups significantly influence this inflammatory response.

Area of Science:

  • Biomaterials Science
  • Immunology
  • Polymer Chemistry

Background:

  • Therapeutic embolisation particles often trigger inflammatory reactions in vivo.
  • Hydrogel microspheres made from N-acryloyl-2-amino-2-(hydroxymethyl)-1,3-propanediol (Trisacryl) are promising for embolisation.

Purpose of the Study:

  • To evaluate the in vitro complement-activating capacity of various Trisacryl microspheres.
  • To identify modifications that can decrease in vivo inflammatory reactions.

Main Methods:

  • In vitro assessment of complement activation by Trisacryl particles (microporous, macroporous, substituted).
  • Comparison with Sephadex and hydroxymethylated polystyrene.
  • Analysis of surface features and functional group effects on complement activation.

Related Experiment Videos

Main Results:

  • Trisacryl activated complement significantly less than Sephadex and hydroxymethylated polystyrene.
  • Microporous and macroporous structures showed similar complement activation levels.
  • Surface roughness slightly increased activation, but macropores did not.
  • Sulfonate group substitution markedly decreased complement activation.

Conclusions:

  • Complement activation by hydroxyl-bearing polymers depends on both hydroxyl density and the polymer backbone.
  • Trisacryl microspheres exhibit reduced complement activation, suggesting lower inflammatory potential.
  • Sulfonated Trisacryl particles are particularly promising for minimizing inflammatory responses in therapeutic embolisation.