Compact zwitterion-coated iron oxide nanoparticles for in vitro and in vivo imaging.
Compact zwitterion-coated iron oxide nanoparticles for in vitro and in vivo imaging.
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DOI:
10.1039/c2ib20142a
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发表时间:
2013-01
期刊:
影响因子:
--
通讯作者:
Bawendi MG
中科院分区:
文献类型:
--
作者:
Wei H;Bruns OT;Chen O;Bawendi MG
We have recently developed compact and water-soluble zwitterionic dopamine sulfonate (ZDS) ligand coated superparamagnetic iron oxide nanoparticles (SPIONs) for use in various biomedical applications. The defining characteristics of ZDS-coated SPIONs are small hydrodynamic diameters, low non-specific interactions with fetal bovine serum, the opportunity for specific labeling, and stability with respect to time, pH, and salinity. We report here on the magnetic characterization of ZDS-coated SPIONs and their in vitro and in vivo performance relative to non-specific interactions with HeLa cells and in mice, respectively. ZDS-coated SPIONs retained the superparamagnetism and saturation magnetization (Ms) of as-synthesized hydrophobic SPIONs, with Ms=74 emu/g [Fe]. Moreover, ZDS-coated SPIONs showed only small non-specific uptake into HeLa cancer cells in vitro and low non-specific binding to serum proteins in vivo in mice.
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