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Quantifying the influence of polymer coatings on the serum albumin corona formation around silver and gold nanoparticles

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Abstract

When nanoparticles (NPs) come into contact with biological fluids, proteins, and other biomolecules interact with their surface. Upon exposure to biological fluids a layer of proteins adsorbs onto their surface, the so-called protein corona, and interactions of biological systems with NPs are therefore mediated by this corona. Here, interactions of serum albumin with silver and gold NPs were quantitatively investigated using circular dichroism spectroscopy. Moreover, surface enhanced Raman spectroscopy was used for further elucidation of protein binding to silver surfaces. The decisive role of poly(vinylpyrrolidone), coatings on the protein adsorption was quantitatively described for the first time and the influential role of the polymer coatings is discussed. Research in nanotoxicology may benefit from such molecular scale data as well as scientific approaches seeking to improve nanomedical applications by using a wide range of polymer surface coatings to optimize biological transport and medical action of NPs.

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Acknowledgments

The authors acknowledge the support of this study by the Deutsche Forschungsgemeinschaft (DFG) within the priority programme “Bio-Nano-Responses” (SPP1313). The authors thank R. Zellner for valuable discussions and S. Boukercha for assistance with SEM-measurements. LT acknowledges support by a Young Scientists Grant of the UDE, by a research grant of the Centre for Water and Environmental Science (CWE) and by the Bruno-Werdelmann Foundation.

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Treuel, L., Malissek, M., Grass, S. et al. Quantifying the influence of polymer coatings on the serum albumin corona formation around silver and gold nanoparticles. J Nanopart Res 14, 1102 (2012). https://doi.org/10.1007/s11051-012-1102-3

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