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A novel magnetic fluid based on starch-coated magnetite nanoparticles functionalized with homing peptide

Jiang, Ji-Sen and Gan, Zhi-Feng and Yang, Yong and Du, Bing and Qian, Min and Zhang, Ping (2009) A novel magnetic fluid based on starch-coated magnetite nanoparticles functionalized with homing peptide. Journal of Nanoparticle Research, 11 (6). pp. 1321-1330.

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Official URL: http://www.springerlink.com/content/l55n5186854643...

Abstract

Preparation and characterization in vitro and in vivo of a novel magnetic fluid based on starch-coated magnetite nanoparticles functionalized with homing peptide is reported in this paper. Precursory magnetic fluids stabilized with starch were prepared, in a polymeric starch matrix, by controlled chemical coprecipitation of magnetite phase from aqueous solutions. The average hydrodynamic diameter of starch-coated iron oxide nanoparticles (SIONs) was 46 nm. As a homing peptide, A54 is the most effective peptide specific to the human hepatocellular carcinoma cell line BEL-7402. Final magnetic fluids were obtained through chemical coupling of homing peptide labeled with 5-carboxyl-fluorescein (FAM-A54) and SIONs. Magnetic measurements showed the saturation magnetization value of SIONs amounted to 45 emu/g and the FAM-A54-coupled SIONs showed a good magnetic response in magnetic field. The results of experiments in vitro and in vivo showed that SIONs were endowed with specific affinity to corresponding tumor cells after coupling with FAM-A54 and the FAM-A54-coupled SIONs could be accumulated in the tumor tissue with more efficiency than individual magnetic targeting or biomolecular targeting. This novel magnetic fluid with dual function has great potential applications in diagnostics and therapeutics of human tumor such as drug targeting, magnetic hyperthermia, and magnetic resonance imaging.

Item Type:Article
Uncontrolled Keywords:Magnetic fluid - Dual function - Homing peptide - Nanoparticles coupling - Nanomedicine
Subjects:Physical Science > Nanomagnetics
Biomedical Science > Nanomedicine
ID Code:6554
Deposited By:SPI
Deposited On:27 Jul 2009 15:38
Last Modified:27 Jul 2009 15:38

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