Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (9): 1896.

• Articles • Previous Articles     Next Articles

Synthesis and Characterization of the Hexachlorotriphosphaxene Cross-linked Oligo(ethyleneimine) as Gene Carrier

LI Fei-Fan1,2, TIAN Hua-Yu1, CHEN Lei1,2, XIA Jia-Liang1,2, CHEN Xue-Si1*, JING Xia-Bin1   

  1. 1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2009-11-24 Online:2010-09-10 Published:2010-09-10
  • Contact: CHEN Xue-Si. E-mail: xschen@ciac.jl.cn
  • Supported by:

    国家自然科学基金(批准号: 20604028, 50873102, 50733003, A3项目50425309)和科技部项目(批准号: 2005DFA50290, 2007DFR50200)资助.

Abstract: Hyperbranched oligo(ethyleneimine) with molecular weight of 600 was carried out reaction with hexachlorotriphosphazene in anhydrous chloroform to synthesize a degradable and cross-linked polymer as a non-viral gene carrier. The 1H NMR spectra confirmed the formation of the polymer and its average molecular weight was obtained by GPC with HAc/NaAc buffering solution of pH=4.4 as fluent phase. The polymer compressed DNA into stable complexes in diameter of about 150 nm and zeta potential of 30—40 mV measured by dynamic light scattering. Besides, when the mass ratio of polymer and DNA was 0.4, the plasmids were fully retarded in 1% agarose gel by gel retardation electrophoresis. The cytotoxicity and transfection efficiency were characterized by HeLa cells in vitro. It was indicated that the best transfection efficiency of polymer with lower cytotoxicity was three times higher than that of PEI-25K. Therefore, the synthesized polymer may have good potential applications as non-viral gene carriers.

Key words: Hexachlorotriphosphazene, Oligo(ethyleneimine), Gene carrier, Transfection, Cytotoxicity

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