Plasmid DNA transfection using magnetite cationic liposomes for construction of multilayered gene-engineered cell sheet

Kosuke Ino, Tamayo Kawasumi, Akira Ito, Hiroyuki Honda

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Modification of cellular functions by over-expression of genes is being increasingly practiced for tissue engineering. In the present study, we investigated whether transfection efficiency could be enhanced by magnetofection that involves the use of plasmid DNA (pDNA)/magnetite cationic liposomes (MCLs) complexes (pDNA/MCL) and magnetic force. The transfection efficiencies of the magnetofection technique by pDNA/MCL in fibroblasts and keratinocytes using reporter genes were 36- and 10-fold higher, respectively, than those of a lipofection technique by cationic liposomes. Moreover, in vitro construction of three-dimensional (3D) tissues is an important challenge. We recently proposed a novel technique termed "magnetic force-based tissue engineering" (Mag-TE) to produce 3D tissues. Since the fibroblasts after magnetofection incorporated both magnetite nanoparticles and pDNA, we investigated whether multilayered heterotypic cell sheets expressing transgene could be fabricated by Mag-TE. First, the fibroblasts were seeded onto an ultra-low attachment culture plate. When a magnet was placed under the plate, the cells accumulated at the bottom of the culture plate. After 24 h of culture, the transgene-expressing cells formed a multilayered cell sheet-like structure. These results indicated that MCLs are a potent biomanipulation tool for both gene transfer and 3D tissue construction, suggesting that these techniques are useful for tissue engineering.

Original languageEnglish
Pages (from-to)168-176
Number of pages9
JournalBiotechnology and Bioengineering
Issue number1
Publication statusPublished - 2008 May 1
Externally publishedYes


  • Liposomes
  • Magnetic force
  • Magnetite
  • Skin
  • Tissue engineering
  • Transfection

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology


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