Reshaping Intratumoral Mononuclear Phagocytes with Antibody‐Opsonized Immunometabolic Nanoparticles

作者：Chang Liu, Yanfeng Zhou, Daoxia Guo, Yan Huang, Xiaoyuan Ji, Qian Li, Nan Chen, Chunhai Fan, Haiyun Song · 发表于：Advanced Science · 年份：2023 · DOI：10.1002/advs.202303298 · 被引用次数：18 · 研究领域：Immune cells in cancer、Nanoparticle-Based Drug Delivery、Phagocytosis and Immune Regulation

Mononuclear phagocytes (MPs) are vital components of host immune defenses against cancer. However, tumor-infiltrating MPs often present tolerogenic and pro-tumorigenic phenotypes via metabolic switching triggered by excessive lipid accumulation in solid tumors. Inspired by viral infection-mediated MP modulation, here enveloped immunometabolic nanoparticles (immeNPs) are designed to co-deliver a viral RNA analog and a fatty acid oxidation regulator for synergistic reshaping of intratumoral MPs. These immeNPs are camouflaged with cancer cell membranes for tumor homing and opsonized with anti-CD163 antibodies for specific MP recognition and uptake. It is found that internalized immeNPs coordinate lipid metabolic reprogramming with innate immune stimulation, inducing M2-to-M1 macrophage repolarization and tolerogenic-to-immunogenic dendritic cell differentiation for cytotoxic T cell infiltration. The authors further demonstrate that the use of immeNPs confers susceptibility to anti-PD-1 therapy in immune checkpoint blockade-resistant breast and ovarian tumors, and thereby provide a promising strategy to expand the potential of conventional immunotherapy.