Abstract
Amino-functionalized superparamagnetic iron oxide nanoparticles (SPION) were synthesized by coprecipitation method. The particles were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), scanning electron micrographs (SEM), transmission electron micrographs (TEM) and atomic force micrographs (AFM). The size of the modified particles varied in the range 10–15 nm and did not change significantly after modification. Hepama-1, an excellent humanized monoclonal antibody directed against liver cancer, was conjugated to the SPION to prepare immuno-magnetic nanoparticles (IMN). A direct labeling method was employed to radiolabel IMN with rhenium-188. The radiolabeling efficiency was about 90% with good in vitro stability. 188Re labeled IMN could markedly kill SMMC-7721 liver cancer cells. Such SPION might be very useful for bio-magnetically targeted radiotherapy in liver cancer treatment.
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The research program was supported by National Natural Science Foundation of China (Grant No. 10405034 and 20501022) and the Knowledge Innovation Project of Chinese Academy of Sciences (Grant No. JCXI-SW-08).
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Liang, S., Wang, Y., Yu, J. et al. Surface modified superparamagnetic iron oxide nanoparticles: as a new carrier for bio-magnetically targeted therapy. J Mater Sci: Mater Med 18, 2297–2302 (2007). https://doi.org/10.1007/s10856-007-3130-6
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DOI: https://doi.org/10.1007/s10856-007-3130-6