Ferroptosis, a newfound non-apoptotic cell death pathway that is
iron- and
reactive oxygen species (ROS)-dependent, has shown a promise for
tumor treatment. However, engineering ferroptosis inducers with sufficient
hydrogen peroxide (H2O2) and
iron supplying capacity remains a great challenge. To address this issue, herein, we report a powerful nanoreactor by modifying MnO2,
glucose oxidase, and
polyethylene glycol on
iron-based
metal-organic framework nanoparticles for disrupting redox and
iron metabolism homeostasis, directly providing the Fenton reaction-independent downstream ferroptosis for
tumor therapy. By consuming
glutathione and oxidizing
glucose to increase the H2O2 level in
cancer cells and downregulating
ferroportin 1 to accumulate intracellular
iron ions, the homeostasis disruptor could effectively enhance the ferroptosis. Subsequently, the ferroptosis cells release
tumor immune-associated antigens, which combine with in situ injected aptamer-PD-L1 to further strengthen the
tumor treatment efficiency. This work not only paves a way to enhance the efficacy of ferroptosis-based
cancer therapy by associating intracellular redox homeostasis with the
iron metabolism system in
tumor cells but also offers an engineered nanoreactor as a promising mimetic
antigen for activating
immunotherapy.