Fig. 1.
Protein corona shield nanoparticle (PCSN). a We introduce the protein corona shield (PCS) concept for an efficient target drug delivery system. Generally, nanoparticle drug carriers with a target ligand lose their targeting ability on being coated by blood proteins in a biological environment. However, the PCS system can inhibit blood protein adsorption to maintain the targeting ability and avoid unwanted clearance by the mononuclear phagocyte system. b Mass spectrometry analysis of the GST-HER2-Afb showed a mass of 36.3 kDa. c Zeta-potential analysis of mesoporous silica nanoparticle (MSN) (−23 mV), GSH-MSN (−39 mV), GST-HER2-Afb (−5.25 mV), and PCSN (−5.3 mV). d Size distribution plots of PCSN. e Images of cellular uptake of fluorescein 5 maleimide-modified GST-HER2-Afb by the target cell (SK-BR3) and the negative control (MCF-10A). f Transmission electron microscopic images of GSH-MSN and PCSN (scale bar represents 100 nm). All bar graphs were reported as means ± standard deviations (SDs) for three experimental replicates (n = 3)