Fig.2
Evaluation of cellular uptake and antioxidative performance in vitro. Cellular uptake images of H2O2-stimulated HK-2 cells incubated with A coumarin 6 and B PUA NPs@C6 NPs for 1, 4, and 8 h, respectively. Scale bar: 100 μm. C Flow cytometry analysis of cellular uptake. D ABTS· and E DPPH· scavenging efficiency of RES, PUA NPs and PUA NPs@RES across various equivalent RES concentrations. F Fluorescence images of intracellular ROS levels of H2O2-stimulated HK-2 cells measured by DCFH-DA assay after different treatments. Scale bar: 100 μm. G Flow cytometry analysis of intracellular ROS after different treatments