PET Imaging and Biodistribution of Silicon Quantum Dots in Mice.

PET Imaging and Biodistribution of Silicon Quantum Dots in Mice.
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DOI:
10.1021/ml1002844
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发表时间:
2011-01-01
影响因子:
4.2
通讯作者:
Louie, Angelique Y.
Louie, Angelique Y.
中科院分区:
医学3区
文献类型:
--
作者:
Tu, Chuqiao;Ma, Xuchu;House, Adrian;Kauzlarich, Susan M.;Louie, Angelique Y.

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Investigation of nanomaterial disposition and fate in the body is critical before such material can be translated into clinical application. Herein a new macrocyclic ligand–64Cu2+ complex was synthesized and used to label dextran-coated silicon quantum dots (QD), with an average hydrodynamic diameter of 15.1 ± 7.6 nm. The chelate showed exceptional stability, demonstrated by no loss radiolabel under a ligand competition reaction with EDTA. The QDs’ biodistribution in mice was quantitatively evaluated by in vivo positron emission tomography (PET) imaging and ex vivo gamma counting. Results showed that they were excreted via renal filtration shortly postinjection and also accumulated in the liver.
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