Macromolecular Research

  • 제14권3호
  • /
  • Pages.348-353
  • /
  • 2006
  • /
  • 1598-5032(pISSN)
  • /
  • 2092-7673(eISSN)
한국고분자학회 (The Polymer Society of Korea)
권호 표지

Low Molecular Weight PEI Conjugated Pluronic Copolymer: Useful Additive for Enhancing Gene Transfection Efficiency

  • Cho Kyung-Chul (Department of Biological Sciences, Korea Advanced Institute of Science and Technology) ;
  • Choi Seung-Ho (Department of Biological Sciences, Korea Advanced Institute of Science and Technology) ;
  • Park Tae-Gwan (Department of Biological Sciences, Korea Advanced Institute of Science and Technology)
  • 발행 : 2006.06.01
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초록

For enhancing the gene delivery efficiency of polyplexes, a new formulation was developed using PEI conjugated Pluronic F127 copolymer as an effective additive. Low molecular weight, branched polyethylenimine Mw 600 (LMW BPEI 600) was conjugated to the terminal end of Pluronic F127. The PEI-modified Pluronic copolymers formed a micellar structure in aqueous solution, similar to that of unmodified Pluronic copolymer. PEI modification of Pluronic copolymer increased the size of micelles while concomitantly raising the critical micelle concentration (CMC). The PEI-modified Pluronic copolymer was used as a micellar additive to enhance the gene transfection efficiency of pre-formulated polyelectrolyte complex nanoparticles composed of luciferase plasmid DNA and branched PEI Mw 25k (BPEI 25k) or polylysine Mw 39k (PLL 39k). The luciferase gene expression levels were significantly enhanced by the addition of the BPEI-modified Pluronic copolymer for the two formulations of BPEl and PLL polyplexes. The results indicated that the BPEI-modified Pluronic copolymer micelles ionically interacted on the surface of DNA/BPEI (PLL) polyplexes which might facilitate cellular uptake process.

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