A Biomimetic Nanoagonist for Synergistic Photodynamic/Ferroptosis/Disulfidptosis Therapy via Coinhibition of Glucose Metabolism and the SLC7A11/GSH/GPX4 Axis

Photodynamic therapy (PDT) faces significant challenges in clinical applications, including tumor hypoxia, the poor water solubility of photosensitizers, and insufficient targeting specificity. To address these limitations, we developed a biomimetic nanoagonist, 4T1@MFCB, by coloading a near-infrared photosensitizer (CyI) and a GLUT1 inhibitor (BAY-876) into a manganese/iron bimetallic metal-organic framework (MOF), followed by coating with the homologous 4T1 cell membrane. The manganese component catalyzes the decomposition of endogenous H₂O₂ to generate oxygen, alleviating tumor hypoxia and enhancing PDT efficacy, while the iron component promotes ferroptosis via the Fenton reaction. Meanwhile, BAY-876 inhibits glucose uptake, disrupting NADPH production and the cystine-to-cysteine reduction process, which leads to cystine accumulation and glutathione (GSH) depletion. These effects collectively suppress the Solute Carrier Family 7 Member 11(SLC7A11)/glutathione (GSH)/glutathione peroxidase 4 (GPX4) antioxidant axis, thereby triggering disulfidptosis. Under near-infrared irradiation, CyI mediates effective photodynamic and photothermal therapy (PTT). Both in vitro and in vivo studies demonstrate that 4T1@MFCB enables synergistic PDT/ferroptosis/disulfidptosis therapy, significantly inhibiting tumor growth without obvious systemic toxicity. This work highlights a multimodal treatment strategy that integrates metabolic intervention with nanocatalytic therapy, providing a promising approach for the precision treatment of hypoxic and therapy-resistant tumors.