Inhibition of surface induced coagulation by preadsorption of albumin-heparin conjugates

W.E. Hennink, S.W. Kim, Jan Feijen

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Abstract

Surface coatings of the albumin-heparin conjugates were developed to improve the blood compatibility of polymeric materials. Glass, PVC, Biomer and cellulose acetate were coated with albumin-heparin conjugate and its adsorption and desorption behavior on glass in particular was studied using 3H and 51Cr radiolabeled conjugates. Precoated materials showed a significant prolongation of the Lee-White clotting time as compared with noncoated ones. It was demonstrated that the prolonged clotting time for pretreated glass was due to surface bound conjugate. Prolonged recalcification times of plasma exposed to glass, Biomer, and PVC were obtained using albumin-heparin conjugate precoated surfaces. Albumin-heparin conjugates with high affinity for antithrombin III gave more prolonged clotting times as low affinity conjugates when used as coatings for glass. This indicates that the behaviour of heparin in preadsorbed conjugates resembles that of heparin in solution.
Original languageUndefined
Pages (from-to)911-926
JournalJournal of biomedical materials research
Volume18
Issue number8
DOIs
Publication statusPublished - 1984

Keywords

  • IR-70629

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