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Related Experiment Videos

Heparin-endothelial cell interactions.

P A D'Amore1

  • 1Children's Hospital, Boston, Mass.

Haemostasis
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

Heparin influences endothelial cell proliferation through interactions with fibroblast growth factors (FGFs). Released heparin can mobilize FGFs, promoting vascular cell proliferation at injury sites.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Vascular Biology

Background:

  • Heparin exhibits non-anticoagulant effects on endothelial cells.
  • These effects are linked to interactions with fibroblast growth factors (FGFs).
  • FGFs bind to heparin, facilitating their purification and suggesting a role in extracellular matrix interactions.

Purpose of the Study:

  • To investigate the role of heparin in endothelial cell proliferation beyond its anticoagulant activity.
  • To explore the interaction between heparin and fibroblast growth factors (FGFs).
  • To understand the mechanism of FGF release and its impact on vascular cells.

Main Methods:

  • In vitro and in vivo studies examining heparin-endothelial cell interactions.
  • Analysis of fibroblast growth factor (FGF) binding to immobilized heparin.

Related Experiment Videos

  • Intravenous heparin infusion in rabbits to measure plasma FGF levels.
  • Infusion of FGF in normal and injured animal models.

    • Main Results:

    • Heparin's non-anticoagulant actions are primarily mediated through FGF interactions.
    • FGFs lack a signal sequence but are found extracellularly bound to heparin-like glycosaminoglycans.
    • Heparin infusion increases plasma FGF-like molecules.
    • Circulating FGF affects vascular cell proliferation significantly at injured sites, but not in normal vasculature.

    Conclusions:

    • Matrix-associated FGF acts as a reservoir, potentially released by enzymes or heparin.
    • Heparin plays a critical role in regulating FGF availability and function.
    • FGFs are key mediators of vascular repair and proliferation at sites of vascular injury.