CAT and neoplasm: Therefore, Muhammad et al. developed an ultrasmallFedoped carbon dots (Fe-CDs) nanozyme, functionalized with ANG2 totarget the overexpressed LRP-1 and accumulate in brain tumor areas.This nanozyme exhibited multifunctional enzymatic activities, includingPOD, OXD, SOD, and CAT, allowing for specific ROS regulation withinthe tumor microenvironment.