Bulletin of the Korean Chemical Society

  • 제33권8호
  • /
  • Pages.2567-2573
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  • 2012
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Lipofectamine-2000 Assisted Magnetofection to Fibroblast Cells Using Polyethyleneimine-Fe3O4@SiO2 Nanoparticles

  • Jang, Eue-Soon (Department of Applied Chemistry, Kumoh National Institute of Technology) ;
  • Park, Kyeong-Soon (College of Pharmacy, Seoul National University)
  • 투고 : 2012.04.09
  • 심사 : 2012.05.05
  • 발행 : 2012.08.20
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초록

We successfully synthesized $Fe_3O_4@SiO_2$ nanoparticles with ultrathin silica layer of $1.0{\pm}0.5$ nm that polyethyleneimine (PEI) with low molecular weight of 2.0-4.0 kDa was covalently conjugated with the resulting $Fe_3O_4@SiO_2$ nanoparticles by silane coupling reaction. The PEI-$Fe_3O_4@SiO_2$ nanoparticles were further used as gene delivery vector for a human fibroblast cell (IMR-90) line. Gene transfection efficiency of the PEI-$Fe_3O_4@SiO_2$ complexes did not increase remarkably after magnetofection; however, the addition of Lipofectamine 2000 significantly increased the transfection efficiency of the PEI-$Fe_3O_4@SiO_2$ complexes. We believe that the present approach could be utilized for magnetofection as alternative to $Fe_3O_4$ nanoparticles conjugated with the PEI of high molecular weight thanks to its relatively low cytotoxicity and high transfection efficiency.

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