Human mesenchymal stem cell behavior on segmented polyurethanes prepared with biologically active chain extenders

J Mater Sci Mater Med. 2016 Feb;27(2):38. doi: 10.1007/s10856-015-5654-5. Epub 2015 Dec 24.

Abstract

The development of elastomeric, bioresorbable and biocompatible segmented polyurethanes (SPUs) for use in tissue-engineering applications has attracted considerable interest because of the existing need of mechanically tunable scaffolds for regeneration of different tissues, but the incorporation of osteoinductive molecules into SPUs has been limited. In this study, SPUs were synthesized from poly (ε-caprolactone)diol, 4,4'-methylene bis(cyclohexyl isocyanate) using biologically active compounds such as ascorbic acid, L-glutamine, β-glycerol phosphate, and dexamethasone as chain extenders. Fourier transform infrared spectroscopy (FTIR) revealed the formation of both urethanes and urea linkages while differential scanning calorimetry, dynamic mechanical analysis, X-ray diffraction and mechanical testing showed that these polyurethanes were semi-crystalline polymers exhibiting high deformations. Cytocompatibility studies showed that only SPUs containing β-glycerol phosphate supported human mesenchymal stem cell adhesion, growth, and osteogenic differentiation, rendering them potentially suitable for bone tissue regeneration, whereas other SPUs failed to support either cell growth or osteogenic differentiation, or both. This study demonstrates that modification of SPUs with osteogenic compounds can lead to new cytocompatible polymers for regenerative medicine applications.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biocompatible Materials / chemistry*
  • Bone and Bones / cytology
  • Bone and Bones / drug effects
  • Cell Adhesion / drug effects
  • Cell Proliferation / drug effects
  • Cell Survival / drug effects
  • Cells, Cultured
  • Humans
  • Materials Testing
  • Mechanical Phenomena
  • Mesenchymal Stem Cells / cytology*
  • Mesenchymal Stem Cells / drug effects*
  • Mesenchymal Stem Cells / physiology
  • Osteogenesis / drug effects
  • Polyurethanes / chemistry*
  • Tissue Engineering / instrumentation
  • Tissue Engineering / methods
  • Tissue Scaffolds / chemistry*

Substances

  • Biocompatible Materials
  • Polyurethanes