材料科学
光热治疗
肿瘤微环境
免疫疗法
癌症研究
免疫系统
癌症免疫疗法
纳米医学
免疫原性细胞死亡
纳米技术
医学
免疫学
纳米颗粒
作者
Shuai Guo,Dongsheng Tang,Mengjie Zhang,Haiyin Yang,Tian Zhang,Bo Hu,Cong Xu,Yuhua Weng,Kun Shang,Yuanyu Huang
标识
DOI:10.1002/adma.202400228
摘要
The integration of nanomedicine and immunotherapy has presented a promising opportunity for the treatment of cancer and diverse diseases. However, achieving spatiotemporal controllable immunotherapy with excellent efficacy and safety performances remains a significant challenge. This study develops a biodegradable near-infrared II (NIR-II) photothermal response polymer nanoparticle (PTEQ) system. This platform exhibits intrinsic immunostimulatory properties while concurrently delivering siRNA for Programmed Death-Ligand 1 (siPD-L1), leveraging enhanced immune responses and immune checkpoint blockade for safe and effective cancer therapy. In the CT26 tumor-bearing mouse model, PTEQ, as an immune stimulant, significantly boosts the infiltration of CD4+ and CD8+ T cells within the tumor microenvironment (TME). The PTEQ/siPD-L1+laser group not only initiates NIR-II photothermal therapy but also promotes the activation and infiltration of T cells, M1 macrophage polarization, and maturation of dendritic cells in the TME, resulting in the complete elimination of tumors in 7/10 cases, achieving a 100% survival rate. In another in vivo vaccine experiment, all tumors on the right side are completely eliminated in the PTEQ/siPD-L1+laser group, reaching a 100% tumor eradication rate. These findings underscore the potential of this strategy to overcome the current immunotherapeutic limitations and achieve immune therapy normalization.
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