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Cited by 217

The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.

Preventing Protein Adsorption and Macrophage Uptake of Gold Nanoparticles via a Hydrophobic Shield

Open access
Larson, Timothy A., Joshi, Pratixa P., Sokolov, Konstantin·2012·ACS Nano

Abstract

Polyethylene glycol (PEG) surface coatings are widely used to render stealth properties to nanoparticles in biological applications. There is abundant literature on the benefits of PEG coatings and their ability to reduce protein adsorption, to diminish nonspecific interactions with cells, and to improve pharmacokinetics, but very little discussion of the limitations of PEG coatings. Here, we show that physiological concentrations of cysteine and cystine can displace methoxy-PEG-thiol molecules from the gold nanoparticle (GNP) surface that leads to protein adsorption and cell uptake in macrophages within 24 h. Furthermore, we address this problem by incorporating an alkyl linker between the PEG and the thiol moieties that provides a hydrophobic shield layer between the gold surface and the hydrophilic outer PEG layer. The mPEG-alkyl-thiol coating greatly reduces protein adsorption on GNPs and their macrophage uptake. This has important implications for the design of GNP for biological systems.

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Metadata

Authors
Larson, T. A., Joshi, P. P., & Sokolov, K.
Venue
ACS Nano
Published
2012-09-25
Volume
6
Issue
10
Pages
9182-9190
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2038282755
Cited by
217
References
5
FWCI
7.53
Type
journal article
Language
en
Open access
green

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