Chelator-free (64)Cu-integrated gold nanomaterials for positron emission tomography imaging guided photothermal cancer therapy.

Chelator-free (64)Cu-integrated gold nanomaterials for positron emission tomography imaging guided photothermal cancer therapy.
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DOI:
10.1021/nn502950t
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发表时间:
2014-08-26
期刊:
影响因子:
17.1
通讯作者:
Chen, Xiaoyuan
Chen, Xiaoyuan
中科院分区:
材料科学1区
文献类型:
--
作者:
Sun, Xiaolian;Huang, Xinglu;Yan, Xuefeng;Wang, Yu;Guo, Jinxia;Jacobson, Orit;Liu, Dingbin;Szajek, Lawrence P.;Zhu, Wenlei;Niu, Gang;Kiesewetter, Dale O.;Sun, Shouheng;Chen, Xiaoyuan

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Using positron emission tomography (PET) imaging to monitor and quantitatively analyze the delivery and localization of Au nanomaterials (NMs), a widely used photothermal agent, is essential to optimize therapeutic protocols to achieve individualized medicine and avoid side effects. Coupling radiometals to Au NMs via a chelator faces the challenges of possible detachment of the radiometals as well as surface property changes of the NMs. In this study, we reported a simple and general chelator-free 64Cu radiolabeling method by chemically reducing 64Cu on the surface of polyethylene glycol (PEG)-stabilized Au NMs regardless of their shape and size. Our 64Cu-integrated NMs are proved to be radiochemically stable and can provide an accurate and sensitive localization of NMs through noninvasive PET imaging. We further integrated 64Cu onto arginine-glycine-aspartic acid (RGD) peptide modified Au nanorods (NRs) for tumor theranostic application. These NRs showed high tumor targeting ability in a U87MG glioblastoma xenograft model and were successfully used for PET image-guided photothermal therapy.
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