Surface modification of hydrophobic polymers for improvement of endothelial cell-surface interactions

A. Dekker, K. Reitsma, T. Beugeling, A. Bantjes, J. Feijen, C.J. Kirkpatrick, W.G. van Aken

Research output: Contribution to journalArticleAcademic

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Abstract

The aim of this study is to improve the interaction of endothelial cells with polymers used in vascular prostheses. Polytetrafluoroethylene (PTFE; Teflon) films were treated by means of nitrogen and oxygen plasmas. Depending on the plasma exposure time, modified PTFE surfaces showed water-contact angles of 15¿58° versus 96° for unmodified PTFE. Electron spectroscopy in chemical analysis (ESCA) measurements revealed incorporation of both nitrogenand oxygen-containing groups into the PTFE surfaces, dependent on the plasma composition and exposure time. In-vitro biological evaluation of unmodified and modified PTFE surfaces showed that human endothelial cells, seeded from 20% human serum-containing culture medium, adhered well on to modified PTFE surfaces, but not on to unmodified films. Adhesion of endothelial cells on to expanded PTFE graft material (Gore-Tex) was also stimulated by plasma treatment of this substrate. On plasma-treated expanded PTFE, the adhering endothelial cells formed a monolayer, which covered the textured surface. The latter observation is important in view of the hemocompatibility of vascular grafts seeded with endothelial cells before implantation.
Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalClinical materials
Volume0
Issue number11
DOIs
Publication statusPublished - 1992

Keywords

  • METIS-105256
  • IR-9625

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