Mapping and identification of soft corona proteins at nanoparticles and their impact on cellular association

Hossein Mohammad-Beigi, Yuya Hayashi, Christina Moeslund Zeuthen, Hoda Eskandari, Carsten Scavenius, Kristian Juul-Madsen, Thomas Vorup-Jensen, Jan J. Enghild, Duncan S. Sutherland

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Feb 10, 2020
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Received Date: 29th January 20

The current understanding of the biological identity that nanoparticles may acquire in a given biological milieu is mostly inferred from the hard component of the protein corona (HC). The composition of soft corona (SC) proteins and their biological relevance have remained elusive due to the lack of analytical separation methods. Here, we identified a set of specific corona proteins with weak interactions at silica and polystyrene nanoparticles by using an in situ click-chemistry reaction. We show that these SC proteins are present also in the HC, but are specifically enriched after the capture, suggesting that the main distinction between HC and SC is the differential binding strength of the same proteins.  Interestingly, the weakly interacting proteins in the SC are revealed as modulators of nanoparticle-cell association, in spite of their short residence time. We therefore highlight that weak interactions of proteins at nanoparticles should be considered when evaluating nano-bio interfaces.

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This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.

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