iPS cell sheets created by a novel magnetite tissue engineering method for reparative angiogenesis

Sci Rep. 2013:3:1418. doi: 10.1038/srep01418.

Abstract

Angiogenic cell therapy represents a novel strategy for ischemic diseases, but some patients show poor responses. We investigated the therapeutic potential of an induced pluripotent stem (iPS) cell sheet created by a novel magnetite tissue engineering technology (Mag-TE) for reparative angiogenesis. Mouse iPS cell-derived Flk-1(+) cells were incubated with magnetic nanoparticle-containing liposomes (MCLs). MCL-labeled Flk-1(+) cells were mixed with diluted extracellular matrix (ECM) precursor and a magnet was placed on the reverse side. Magnetized Flk-1(+) cells formed multi-layered cell sheets according to magnetic force. Implantation of the Flk-1(+) cell sheet accelerated revascularization of ischemic hindlimbs relative to the contralateral limbs in nude mice as measured by laser Doppler blood flow and capillary density analyses. The Flk-1(+) cell sheet also increased the expressions of VEGF and bFGF in ischemic tissue. iPS cell-derived Flk-1(+) cell sheets created by this novel Mag-TE method represent a promising new modality for therapeutic angiogenesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Culture Techniques
  • Cells, Cultured
  • Extracellular Matrix / metabolism
  • Fibroblast Growth Factor 2 / metabolism
  • Hindlimb / metabolism
  • Induced Pluripotent Stem Cells / cytology*
  • Induced Pluripotent Stem Cells / metabolism
  • Induced Pluripotent Stem Cells / transplantation
  • Ischemia / metabolism
  • Ischemia / pathology
  • Ischemia / therapy
  • Laser-Doppler Flowmetry
  • Liposomes / chemistry
  • Magnetite Nanoparticles / chemistry*
  • Mice
  • Mice, Nude
  • Neovascularization, Physiologic
  • Tissue Engineering*
  • Vascular Endothelial Growth Factor A / metabolism

Substances

  • Liposomes
  • Magnetite Nanoparticles
  • Vascular Endothelial Growth Factor A
  • Fibroblast Growth Factor 2