Fig. 4
A Schematic representation of Cu-CPNs as the antioxidant nanozyme (typically, SOD and GPx) in ROS scavenging; the SOD-mimicking activity of B Cu-CPNs and C Cu-CPNs@EPL in scavenging efficiencies of O2•− using NBT as the indicator; the GPx-mimicking activity of D Cu-CPNs and E Cu-CPNs@EPL; F The volcano plot of the metabolic profiling change in comparison of Cu-CPNs and PBS treated metabolites, the metabolites were extracted from mouse liver tissue