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Open Access Green as soon as Postprint is submitted to ZB.
In vivo integrity of polymer-coated gold nanoparticles.
Nat. Nanotechnol. 10, 619-623 (2015)
Inorganic nanoparticles are frequently engineered with an organic surface coating to improve their physicochemical properties, and it is well known that their colloidal properties may change upon internalization by cells. While the stability of such nanoparticles is typically assayed in simple in vitro tests, their stability in a mammalian organism remains unknown. Here, we show that firmly grafted polymer shells around gold nanoparticles may degrade when injected into rats. We synthesized monodisperse radioactively labelled gold nanoparticles ((198)Au) and engineered an (111)In-labelled polymer shell around them. Upon intravenous injection into rats, quantitative biodistribution analyses performed independently for (198)Au and (111)In showed partial removal of the polymer shell in vivo. While (198)Au accumulates mostly in the liver, part of the (111)In shows a non-particulate biodistribution similar to intravenous injection of chelated (111)In. Further in vitro studies suggest that degradation of the polymer shell is caused by proteolytic enzymes in the liver. Our results show that even nanoparticles with high colloidal stability can change their physicochemical properties in vivo.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Cells; Biodistribution; Cytotoxicity; Toxicity; Depends; Damage
ISSN (print) / ISBN
1748-3387
e-ISSN
1748-3395
Journal
Nature Nanotechnology
Quellenangaben
Volume: 10,
Issue: 7,
Pages: 619-623
Publisher
Nature Publishing Group
Publishing Place
London
Non-patent literature
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Reviewing status
Peer reviewed