Protracted elimination of gold nanoparticles from mouse liver

Evaldas Sadauskas, Gorm Danscher, Meredin Stoltenberg, Ulla Vogel, Agnete Larsen, Erik Håkan Richard Wallin

    Publikation: Bidrag til tidsskriftTidsskriftartikelpeer review

    Abstract

    The present study aims at revealing the fate of 40-nm gold nanoparticles after intravenous injections. The gold nanoparticles were traced histochemically with light and transmission electron microscopy using autometallographic (AMG) staining, and the gold content in the liver was determined with inductively coupled plasma mass spectrometry (ICP-MS). Gold nanoparticles were identified in almost all Kupffer cells one day after the injection, but the fraction of gold-loaded cells gradually decreased to about one fifth after 6 months. Transmission electron microscopic analysis showed that the gold nanoparticles had accumulated inside the vesicular lysosome/endosome-like structures of the macrophages. At day 1, about 4.5‰ of the area of the liver sections was AMG-stained, after 1 month it had decreased to 0.7‰, and thereafter no further significant reduction was recorded. Because ICP-MS only showed a 9% fall in the gold content over the observed 6 months, the AMG finding of a significant reduction in the stained area of the liver sections and number of macrophages loaded with gold nanoparticles reveals that over time an increasing part of the total amount of gold nanoparticles in the liver is contained in fewer macrophages accumulated in growing clusters
    OriginalsprogEngelsk
    TidsskriftNanomedicine: Nanotechnology, Biology and Medicine
    Vol/bind5
    Udgave nummer2
    Sider (fra-til)162-169
    ISSN1549-9634
    DOI
    StatusUdgivet - 2009

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