Sulfated glyco-block copolymers with specific receptor and growth factor binding to support cell adhesion and proliferation

Biomaterials. 2009 Feb;30(6):1026-35. doi: 10.1016/j.biomaterials.2008.11.005. Epub 2008 Dec 6.

Abstract

We report on the successful preparation of thin glyco-block copolymer films with a combined thermoresponsive and heparin-like functionality. The copolymers were synthesized from poly(N-isopropylacrylamide) and glucose units and were covalently fixed onto glass supports by means of low pressure plasma cross-linking. The thin films retain the thermoresponsive characteristics of poly(N-isopropylacrylamide) with a transition temperature around 33 degrees C. Additionally, it could be shown that sulfation of the glucose moieties introduces a heparin-like functionality to the films. An increase in binding of basic fibroblast growth factor (bFGF) as well as specific adhesion of endothelial cells and hematopoietic progenitor cells could be demonstrated. The functional coupling of bFGF to the glyco-block copolymer surfaces was further proven by the dose-dependent response of endothelial cell proliferation. The results show that the newly synthesized glyco-block copolymers allow for the preparation of biomimetic surfaces with dual functionalities of thermoresponsive and heparin-like characteristics for the application in cell culture experiments with specific binding and release of heparin-binding growth factors and cell adhesion receptors.

MeSH terms

  • Adsorption / drug effects
  • Carbohydrate Conformation
  • Cell Adhesion / drug effects
  • Cell Line
  • Cell Proliferation / drug effects
  • Endothelial Cells / cytology*
  • Endothelial Cells / drug effects
  • Endothelial Cells / metabolism
  • Fibroblast Growth Factor 2 / metabolism*
  • Glucose / chemistry
  • Glucose / pharmacology*
  • Hematopoietic Stem Cells / cytology*
  • Hematopoietic Stem Cells / drug effects
  • Hematopoietic Stem Cells / metabolism
  • Humans
  • Materials Testing
  • Molecular Sequence Data
  • Polymers / chemistry
  • Polymers / pharmacology*
  • Pressure
  • Receptors, Fibroblast Growth Factor / metabolism*
  • Spectrum Analysis
  • Sulfates / pharmacology*
  • Time Factors
  • Transition Temperature

Substances

  • Polymers
  • Receptors, Fibroblast Growth Factor
  • Sulfates
  • Fibroblast Growth Factor 2
  • Glucose