Thrombotic responses of endothelial outgrowth cells to protein-coated surfaces

Deirdre E.J. Anderson, Kathryn A. McKenna, Jeremy J. Glynn, Ulla Marzec, Stephen R. Hanson, Monica T. Hinds

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

There is significant clinical need for viable small-diameter vascular grafts. While there are many graft biomaterials in development, few have been clinically successful. Evaluation of grafts with a clinically relevant model is needed to drive development. This work examined extracellular matrix coatings on the thrombotic phenotype of endothelial outgrowth cells (EOCs). EOCs were tested on flat plates and tubular grafts. Flat plate studies examined collagen I, collagen IV, fibronectin and ?-elastin coatings. EOCs attached or proliferated more readily on collagen I and fibronectin surfaces as determined by total DNA. The production of activated protein C (APC) by EOCs was also dependent on the surface coating, with collagen I and fibronectin displaying a higher activity than both collagen IV and ?-elastin on flat plate studies. Based on these results, only collagen I and fibronectin coatings were tested on expanded polytetrafluoroethylene (ePTFE) in the ex vivo model. Tubular samples showed significantly greater tissue factor pathway inhibitor gene expression on collagen I than on fibronectin. Platelet adhesion was not significantly different, but EOCs on collagen I produced significantly lower APC than on fibronectin, suggesting that differences exist between the flat plate and tubular cultures. Overall, while the hemostatic phenotype of EOCs displayed some differences, cell responses were largely independent of the matrix coating. EOCs adhered strongly to both fibronectin- and collagen- I-coated ePTFE grafts under ex vivo (100 ml/min) flow conditions suggesting the usefulness of this clinically relevant cell source, testing modality, and shunt model for future work examining biomaterials and cell conditioning before implantation.

Original languageEnglish (US)
Pages (from-to)238-248
Number of pages11
JournalCells Tissues Organs
Volume199
Issue number4
DOIs
StatePublished - Feb 24 2014

Keywords

  • Activated protein C
  • Endothelial cells
  • Endothelial outgrowth cells
  • Expanded polytetrafluoroethylene
  • Extracellular matrix
  • Thrombosis
  • Tissue engineering
  • Vascular grafts

ASJC Scopus subject areas

  • Anatomy
  • Histology

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  • Cite this

    Anderson, D. E. J., McKenna, K. A., Glynn, J. J., Marzec, U., Hanson, S. R., & Hinds, M. T. (2014). Thrombotic responses of endothelial outgrowth cells to protein-coated surfaces. Cells Tissues Organs, 199(4), 238-248. https://doi.org/10.1159/000368223