The effect of a recombinant elastin-mimetic coating of an ePTFE prosthesis on acute thrombogenicity in a baboon arteriovenous shunt

Sumanas W. Jordan, Carolyn A. Haller, Rory E. Sallach, Robert P. Apkarian, Stephen R. Hanson, Elliot L. Chaikof*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

103 Scopus citations

Abstract

A recombinant elastin-mimetic triblock protein polymer with an inverse transition temperature (∼20 °C) was used to impregnate small-diameter (4 mm i.d.) expanded polytetrafluoroethylene (ePTFE) vascular grafts. Scanning electron microscopy confirmed that initial elastin impregnation of the graft followed by further multilayer coating with elastin films filled in the fibril and node structure of the luminal surface of the ePTFE graft and was macroscopically smooth. Elastin protein polymer impregnation reduced the advancing contact angle of the luminal surface to 43°, which was comparable to the advancing contact angle of 47° for a cast elastin film. Attenuated total reflection infrared spectroscopy and Coomassie blue staining revealed little discernable change in the protein surface film after 24 h of shear at 500 s-1 and 37 °C. Excellent short-term blood-contacting properties as determined by minimal fibrin and platelet deposition were demonstrated using a baboon extracorporeal femoral arteriovenous shunt model. The results of this study demonstrate the applicability of an elastin-mimetic triblock protein polymer as a non-thrombogenic coating or as a component of a tissue-engineered composite.

Original languageEnglish (US)
Pages (from-to)1191-1197
Number of pages7
JournalBiomaterials
Volume28
Issue number6
DOIs
StatePublished - Feb 2007

Keywords

  • Elastin-mimetic protein polymer
  • Small-diameter vascular graft
  • Thrombogenicity

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

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