Chemodynamic
therapy (CDT) was regarded as a promising approach
for tumor treatment. However, owing to the insufficient amount of
endogenous hydrogen peroxide (H2O2) in tumor
cells, the efficacy of CDT was limited. In this study, we designed
phosphate-responsive nanoparticles (denoted as MGDFT NPs) based on
metal–organic frameworks, which were simultaneously loaded
with drug doxorubicin (DOX) and glucose oxidases (GOx). The decorated
GOx could act as a catalytic nanomedicine for the response to the
abundant glucose in the tumor microenvironment, generating a great
deal of H2O2, which would enhance the Fenton
reaction and produce toxic hydroxyl radicals (·OH). Meanwhile,
the growth of tumors would also be inhibited by overconsuming the
intratumoral glucose, which was the “fuel” for cell
proliferation. When the nanoparticles entered into tumor cells, a
high concentration of phosphate induced structure collapse, releasing
the loaded DOX for chemotherapy. Furthermore, the decoration of target
agents endowed the nanoparticles with favorable target ability to
specific tumor cells and mitochondria. Consequently, the designed
MGDFT NPs displayed desirable synergistic therapeutic effects via
combining chemotherapy, starvation therapy, and enhanced Fenton reaction,
facilitating the development of multimodal precise antitumor therapy.