Abstract
Surface functionalization on silver nanoparticles greatly affects the dynamics of protein corona formation. In the present study, the implications of protein pre-coating on corona formation and nanoparticle's physiological stability, cellular uptake and toxicity were studied on similar sized alkaline protease coated nanoparticles of biological and chemical origin along with the uncoated nanoparticle as compared to the albumin coated nanoparticles. All four nanoparticle types invited serum protein adsorption on their surface. However, the presence of protein pre-coating on nanoparticle surface significantly reduced the extent of further protein binding. Moreover, corona formation on pristine nanoparticles significantly improved their stability in the biological medium. The effect was found to be diluted in protein pre-coated nanoparticles with due exception. Results obtained in the cell-based experiment suggested that the nanoparticles binding to the cell, its uptake, and toxicity in different cell lines can be directly linked to their physiological stability owing to corona formation.
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