In Situ Programming of Nanovaccines for Lymph Node-Targeted Delivery and Cancer Immunotherapy

作者：Liangjie Jin, Dongmei Yang, Yonghong Song, Dongdong Li, Weijia Xu, Yueqiang Zhu, Cong‐Fei Xu, Yang Lü, Xianzhu Yang · 发表于：ACS Nano · 年份：2022 · DOI：10.1021/acsnano.2c06560 · 被引用次数：48 · 研究领域：Immunotherapy and Immune Responses、Nanoplatforms for cancer theranostics、RNA Interference and Gene Delivery

In situ cancer vaccines consisting of antigens and adjuvants are a promising cancer treatment modality; however, the convenient manufacture of vaccines in vivo and their efficient delivery to lymph nodes (LNs) remains a major challenge. Herein, we outline a facile approach to simultaneously achieve the in situ programming of vaccines via two synergetic nanomedicines, Tu-NP FN and Ln-NP R848 . Tu-NP FN (∼100 nm) generated a large number of antigens under an alternating magnetic field, and Ln-NP R848 (∼35 nm) encapsulating adjuvant R848 captured a portion of generated antigens for the manufacture of nanovaccines in situ and LN-targeted delivery, which significantly promoted the uptake and maturation of dendritic cells to initiate potent anticancer immune responses. Notably, combined with an anti-CTLA4 antibody (aCTLA-4), this therapy completely eradicated distant tumors in some mice and exerted a long-term immune memory effect on tumor metastasis. This study provides a generalizable strategy for in situ cancer vaccination.