Mito-Specific "Trojan Horse" Nanotherapy: Synergistic Antitumor Immunotherapy via Dual Modulation Mitochondrial...

Metabolic reprogramming enables tumor cells to survive and proliferate in a nutrient-deficient environment. However, the immunosuppressive tumor microenvironment caused by metabolic reprogramming is often overlooked in current metabolism interventions. Herein, we developed a mito-specific "Trojan Horse" nanoplatform (2-pN@LNPs) coloaded with Niclosamide (Nic) and 2-deoxy-d-glucose (2-DG) to attack key metabolism pathways and synergistically ignite pyroptosis for restoring antitumor immunity. 2-pN@LNPs promoted proton influx across the inner mitochondrial membrane and caused oxidative phosphorylation (OXPHOS) into a futile cycle. Furthermore, 2-pN@LNPs exploited the increased glucose demand to deliver the glycolysis inhibitor 2-DG, causing metabolic network collapse. Both cell and three-dimensional multicellular tumor spheroid results demonstrated superior synergistic metabolic intervention efficacy. The multipath metabolism deprivation leads to irreversible mitochondrial dysfunction, followed by excessive reactive oxygen species accumulation, severe adenosine triphosphate loss, and ultimately exerted a pyroptosis-like micromorphology. Moreover, the synergistic treatment regimen can promote cytotoxic and helper T cells (CD8⁺/CD4⁺ T cells) recruitment and M1-type macrophage polarization, facilitating the establishment of a boost in immunological memory to prevent recurrence and metastasis. Overall, this work provides a robust strategy targeting metabolism through mitochondrial uncoupling and glycolysis inhibition, which can effectively improve the antitumor effect, inhibit lung metastasis, and help modulate antitumor immunity.