Complexation with heparin prevents adhesion between fibrin-coated surfaces

Gregory S. Retzinger*, Linda J. Chandler, Bernard C. Cook

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Heparin, in Langmuirian fashion, binds stoichiometrically with high affinity, K(d) ~ 100 nM, to both fibrinogen and fibrin adsorbed as monomolecular films to lecithin-coated, microscopic, polystyrene- divinylbenzene beads. Complex formation inhibits aggregation of fibrin- coated beads, and it also results in dissociation of preformed aggregates of fibrin-coated beads. These phenomena are not caused by desorption of fibrin(ogen), indirect inhibition of thrombin activity, or mere electrostatic repulsion of charged particles. Instead, these data are consistent with the proposal that the complexed heparin interferes directly with dimer formation between fibrin molecules adsorbed to colliding beads. We describe these phenomena and their application to the development of sensitive analytical methods for quantitating heparin. Based on these observations, we also propose a role for endogenous heparin in the physiologic regulation of fibrin-mediated adhesion of surfaces.

Original languageEnglish (US)
Pages (from-to)24356-24362
Number of pages7
JournalJournal of Biological Chemistry
Volume267
Issue number34
StatePublished - 1992

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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