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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/2456


    Title: Persistent tissue kinetics and redistribution of nanoparticles, quantum dot 705, in mice: ICP-MS quantitative assessment
    Authors: Yang, RH;Chang, LW;Wu, JP;Tsai, MH;Wang, HJ;Kuo, YC;Yeh, TK;Yang, CS;Lin, P
    Contributors: Division of Environmental Health and Occupational Medicine;Center for Nanomedicine Research;Division of Biotechnology and Pharmaceutical Research
    Abstract: BACKGROUND: Quantum dots (QDs) are autofluorescent semiconductor nanocrystals that can be used for in vivo biomedical imaging. However, we know little about their in vivo disposition and health consequences. OBJECTIVES: We assessed the tissue disposition and pharmacokinetics of QD705 in mice. METHODS: We determined quantitatively the blood and tissue kinetics of QD705 in mice after single intravenous (iv) injection at the dose of 40 pmol for up to 28 days. Inductively coupled Plasma-mass spectrometry (ICP-MS) measurement of cadmium was the primary method of quantification of QD705. Fluorescence light microscopy revealed the localization of QD705 in tissues. RESULTS: Plasma half-life of QD705 in mice was short (18.5 hr), but ICP-MS analyses revealed QD705 persisted and even continued to increase in the spleen, liver, and kidney 28 days after an iv dose. Considerable time-dependent redistribution from body mass to liver and kidney was apparent between 1 and 28 days postdosing. The recoveries at both time points were near 100%; all QD705s reside in the body. Neither fecal nor urinary excretion of QD705 was detected appreciably in 28 days postdosing. Fluorescence microscopy demonstrated deposition of QD705 in the liver, spleen, and kidneys. CONCLUSION: judging from the continued increase in the liver (29-42% of the administered dose), kidney (1.5-9.2%), and spleen (4.8-5.2%) between I and 28 days without any appreciable excretion, QD705 has a very long half-life, potentially weeks or even months, in the body and its health consequences deserve serious consideration.
    Keywords: Environmental Sciences;Public, Environmental & Occupational Health
    Date: 2007-09
    Relation: Environmental Health Perspectives. 2007 Sep;115(9):1339-1343.
    Link to: http://dx.doi.org/10.1289/ehp.10290
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0091-6765&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000249200600031
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34748905976
    Appears in Collections:[林嬪嬪] 期刊論文
    [葉燈光] 期刊論文
    [楊重熙] 期刊論文
    [張惠華(1999-2009)] 期刊論文

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