國家衛生研究院 NHRI:Item 3990099045/8432
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/8432


    Title: Establishment of a trimodality analytical platform for tracing, imaging and quantification of gold nanoparticles in animals by radiotracer techniques
    Authors: Chen, CH;Lin, FS;Liao, WN;Liang, SL;Chen, MH;Chen, YW;Lin, WY;Hsu, MH;Wang, MY;Peir, JJ;Chou, FI;Chen, CY;Chen, SY;Huang, SC;Yang, MH;Hueng, DY;Hwu, Y;Yang, CS;Chen, JK
    Contributors: Institute of Biomedical Engineering and Nanomedicine
    Abstract: This study aims to establish a 198Au-radiotracer technique for in vivo tracing, rapid quantification, and ex vivo visualization of PEGylated gold nanoparticles (GNPs) in animals, organs and tissue dissections. The advantages of GNPs lie in its superior optical property, biocompatibility and versatile conjugation chemistry, which are promising to develop diagnostic probes and drug delivery systems. 198Au is used as a radiotracer because it simultaneously emits beta and gamma radiations with proper energy and half-life; therefore, 198Au can be used for bioanalytical purposes. The 198Au-tagged radioactive gold nanoparticles (198Au-GNPs) were prepared simply by irradiating the GNPs in a nuclear reactor through the 197Au(n,gamma)198Au reaction and subsequently the 198Au-GNPs were subjected to surface modification with polyethylene glycol to form PEGylated 198Au-GNPs. The 198Au-GNPs retained physicochemical properties that were the same as those of GNP before neutron irradiation. Pharmacokinetic and biodisposition studies were performed by intravenously injecting three types of 198Au-GNPs with or without PEGylation into mice; the gamma radiation in blood specimens and dissected organs was then measured. The 198Au-radiotracer technique enables rapid quantification freed from tedious sample preparation and shows more than 95% recovery of injected GNPs. Clinical gamma scintigraphy was proved feasible to explore spatial- and temporal-resolved biodisposition of 198Au-GNPs in living animals. Moreover, autoradiography, which recorded beta particles from 198Au, enabled visualizing the heterogeneous biodisposition of 198Au-GNPs in different microenvironments and tissues. In this study, the 198Au-radiotracer technique facilitated creating a trimodality analytical platform for tracing, quantifying and imaging GNPs in animals.
    Date: 2015-01
    Relation: Analytical Chemistry. 2015 Jan;87(1):601-608.
    Link to: http://dx.doi.org/10.1021/ac503260f
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0003-2700&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000347590400061
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84920471776
    Appears in Collections:[Jen-Kun Chen] Periodical Articles
    [Chung-Shi Yang] Periodical Articles

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