Journal of Inorganic Materials ›› 2024, Vol. 39 ›› Issue (5): 517-524.DOI: 10.15541/jim20230464

Special Issue: 【生物材料】肿瘤治疗(202409)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Fe3O4-DMSA-PEI Magnetic Nanoparticles with Small Particle Size: Preparation and Gene Loading

CAI Heqing1(), HAN Lu1(), YANG Songsong1, XUE Xinyu1, ZHANG Kou1, SUN Zhicheng1, LIU Ruping1, HU Kun1, WEI Yan2()   

  1. 1. School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China
    2. Key Laboratory of Organophosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China
  • Received:2023-10-09 Revised:2023-12-07 Published:2024-05-20 Online:2023-12-25
  • Contact: HAN Lu, associate professor. E-mail: hanlu@iccas.ac.cn;
    WEI Yan, professor. E-mail: weiyen@tsinghua.edu.cn
  • About author:CAI Heqing (1997-), male, Master candidate. E-mail: 724040386@qq.com
  • Supported by:
    National Natural Science Foundation of China(61971049);National Natural Science Foundation of China(62211530446);National Natural Science Foundation of China(22278037);Scientific Research Innovation Project from Beijing Institute of Graphic Communication(Ea202205);The 2023 Key Project from Beijing Association of Higher Education(ZD202312)

Abstract:

Ferroferric oxide (Fe3O4) magnetic nanoparticles are widely used as passive targeting carriers in gene therapy, due to their simple preparation, targeting under external magnetic field and easy surface grafting. This study synthesized oil phase Fe3O4 nanoparticles with controllable particle sizes in the range from 4 to 9 nm by regulating the accumulation growth time in the solvothermal method. Then, meso-2, 3-dimercaptosuccinic (DMSA) was employed to double exchange oleic acid molecules on its surface to provide good water dispersibility. Finally, Fe3O4-DMSA-PEI magnetic nanoparticles were obtained by grafting branched polyethylenimine (PEI) onto Fe3O4-DMSA surface through amidization reaction. The results demonstrate that the Fe3O4-DMSA-PEI magnetic nanoparticles have a surface Zeta potential of (52.50 ± 1.94) mV, remaining a certain degree of superparamagnetism (14.48 emu/g, 1 emu/g=1 A∙m2/kg). When the mass ratio of Fe3O4-DMSA-PEI magnetic nanoparticles to plasmid DNA is 15 : 1, it can completely block DNA and its loading capacity is as high as 6.67%. The Fe3O4-DMSA-PEI magnetic nanoparticles prepared in this study have a certain gene delivery ability and are expected to be used as gene carriers in the field of gene transfection.

Key words: ferroferric oxide, magnetic nanoparticle, gene carrier, surface modification

CLC Number: