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In vivo toxicity, biodistribution, and clearance of glutathione-coated gold nanoparticles
Link to Journal Abstract
Gold nanoparticles are emerging as promising materials from which to construct nanoscale therapeutics and therapeutic delivery systems. However, animal studies have shown that gold nanoparticles modified with certain thiol monolayers such as tiopronin can cause renal complications and morbidity. Although these effects may be eliminated by coadsorbing small amounts of polyethylene glycol (PEG) onto the nanoparticle surface, PEG can also lower cellular internalization efficiency and binding interactions with protein disease targets, significantly reducing the potential for using gold nanoparticles as therapeutics. Using ICP-MS analysis of blood, urine, and several organs, we show in this article that glutathione-coated gold nanoparticles (1.2 nm ▒ 0.9 nm) cause no morbidity at any concentration up to and including 60 ýM and target primary organs although providing gradual dissipation and clearance over time. This study suggests that glutathione may be an attractive alternative to PEG in the design of gold nanoparticle therapeutics.
This study describes the utility and toxicity of glutathione coated gold nanoparticles in comparison to PEGylated counterparts that are commonly used to increase ôStealthö properties and lower cytotoxicity.
Peer Reviewed Journal Article
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Nanomedicine: Nanotechnology, Biology and Medicine, 9(2): 257-263 (February 2013)
Nanomedicine: Nanotechnology, Biology and Medicine
Simpson CA, Salleng KJ, Cliffel DE, Feldheim DL
Last updated on March 6, 2013
This work is supported in part by the Nanoscale Science and Engineering Initiative of the National Science Foundation
under NSF Award Number EEC-0118007.
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