The effect of electrical stimulation on the differentiation of hESCs adhered onto fibronectin-coated gold nanoparticles

Biomaterials. 2009 Oct;30(29):5631-8. doi: 10.1016/j.biomaterials.2009.07.026. Epub 2009 Aug 3.

Abstract

To encourage stem cell differentiation, gold nanoparticles (20 nm) were used to deliver electrical stimulation to human embryonic stem cells (hESCs) in vitro. Nano-structured gold nanoparticles were designed by coating the surface of culture dishes with gold nanoparticles using a layer-by-layer (LBL) system. In this method, gold nanoparticles were continuously coated onto dishes by SEM analysis. Evaluation of gene modified hESCs that were subsequently attached onto fibronectin-coated gold nanoparticles revealed that the un-differentiation marker, Oct-4, was no longer present following electrical stimulation. In addition, the osteogenic markers of collagen type I and Cbfa1 increased in response to electrical stimulation, while those of hESCs were not observed without electrical stimulation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Differentiation / radiation effects
  • Cell Line
  • Coated Materials, Biocompatible / chemistry*
  • Electric Stimulation / methods*
  • Embryonic Stem Cells / cytology*
  • Embryonic Stem Cells / physiology
  • Embryonic Stem Cells / radiation effects
  • Fibronectins / chemistry*
  • Gold / chemistry*
  • Humans
  • Materials Testing
  • Nanoparticles / chemistry*
  • Nanoparticles / ultrastructure
  • Osteoblasts / cytology*
  • Osteoblasts / physiology
  • Osteoblasts / radiation effects
  • Osteogenesis / physiology
  • Osteogenesis / radiation effects

Substances

  • Coated Materials, Biocompatible
  • Fibronectins
  • Gold