Self-assembled gold nanoparticle molecular probes for detecting proteolytic activity in vivo.
Self-assembled gold nanoparticle molecular probes for detecting proteolytic activity in vivo.
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DOI:
10.1021/nn9017334
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发表时间:
2010-03-23
期刊:
影响因子:
17.1
通讯作者:
Zetter, Bruce R.
中科院分区:
文献类型:
--
作者:
Mu, C. Jenny;LaVan, David A.;Langer, Robert S.;Zetter, Bruce R.
关键词:
Target-activatable fluorogenic probes based on gold nanoparticles (AuNPs) functionalized with self-assembled heterogeneous monolayers of dye-labeled peptides and poly(ethylene glycol) have been developed to visualize proteolytic activity in vivo. A one-step synthesis strategy that allows simple generation of surface defined AuNP probe libraries is presented as a means of tailoring and evaluating probe characteristics for maximal fluorescence enhancement after protease activation. Optimal AuNP probes targeted to trypsin and urokinase-type plasminogen activator required the incorporation of a dark quencher to achieve 5 to 8-fold signal amplification. These probes exhibited extended circulation time in vivo and high image contrast in a mouse tumor model.
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