Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (6): 889-894.doi: 10.1007/s40242-016-6251-y

• Articles • Previous Articles     Next Articles

Preparation of Functionalized Fe3O4@SiO2 Magnetic Nanoparticles for Monoclonal Antibody Purification

HOU Xuemei1, ZHAO Changjie1, TIAN Yanlong2, DOU Shuliang2, ZHANG Xiang2, ZHAO Jiupeng1   

  1. 1. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, P. R. China;
    2. Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, P. R. China
  • Received:2016-06-15 Revised:2016-09-22 Online:2016-12-01 Published:2016-10-24
  • Contact: ZHAO Jiupeng, E-mail:jiupengzhao@126.com E-mail:jiupengzhao@126.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.51572058, 91216123, 51174063), the Natural Science Foundation of Heilongjiang Province, China(No.E201436), the International Science & Technology Cooperation Program of China(Nos.2013DFR10630, 2015DFE52770) and the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.SRFDP 20132302110031).

Abstract:

Magnetic Fe3O4@SiO2 nanoparticles with superparamagnetic properties were prepared via a reverse mi-croemulsion method at room temperature. The as-prepared samples were characterized by transmission electron mi-croscopy(TEM), X-ray diffractometry(XRD), and vibrating sample magnetometry(VSM). The Fe3O4@SiO2 nanoparticles were modified by (3-aminopropyl)triethoxysilane(APTES) and subsequently activated by glutaraldehyde(Glu). Protein A was successfully immobilized covalently onto the Glu activated Fe3O4@SiO2 nanoparticles. The adsorption capacity of the nanoparticles was determined on an ultraviolet spectrophotometer(UV) and approximately up to 203 mg/g of protein A could be uniformly immobilized onto the modified Fe3O4@SiO2 magnetic beads. The core-shell of the Fe3O4@SiO2 magnetic beads decorated with protein A showed a good binding capacity for the chime-ric anti-EGFR monoclonal antibody(anti-EGFR mAb). The purity of the anti-EGFR mAb was analyzed by virtue of HPLC. The protein A immobilized affinity beads provided a purity of about 95.4%.

Key words: Magnetic, Fe3O4@SiO2, Protein A, Nanoparticle, Monoclonal antibody