Abstract

A comprehensive understanding of nanoparticle (NP)-protein interaction (protein corona formation) is required. So far, many factors influencing this interaction have been investigated, like size and ζ potential. However, NPs exposure concentration has always been ignored. Herein, we aim to disclose the correlation of NPs exposure concentration with protein adsorption. Four polymeric NPs systems possessing similar sizes (230±20nm) but varied ζ potentials (-30 ∼ +40mv) were prepared. Physicochemical properties and protein adsorption upon NP-protein interaction were characterized. Protein adsorption capacity and adsorbed protein types were NPs concentration-dependent. Considering the critical impacts of protein adsorption on NPs delivery, our work could be an urgent warning about the possible risks of dosage adjustment of nanoformulations.

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