Genetically engineered nanovesicles mobilize synergistic antitumor immunity by ADAR1 silence and PDL1 blockade

被引:21
作者
Ding, Lei [1 ,3 ,4 ]
Zhang, Xiaolong [1 ,2 ]
Yu, Peiwen [1 ,2 ]
Peng, Fang [1 ,2 ]
Sun, Yupeng [1 ,2 ]
Wu, Yanni [1 ,2 ]
Luo, Zijin [1 ,2 ]
Li, Hongsheng [1 ,2 ]
Zeng, Yongyi [1 ,2 ]
Wu, Ming [1 ,2 ,5 ]
Liu, Xiaolong [1 ,2 ,3 ,4 ,5 ]
机构
[1] Fujian Med Univ, United Innovat Mengchao Hepatobiliary Technol Key, Mengchao Hepatobiliary Hosp, Fuzhou 350025, Peoples R China
[2] Fujian Med Univ, Liver Ctr Fujian Prov, Fuzhou 350025, Peoples R China
[3] Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China
[4] Univ Sci & Technol China, Sch Rare Earths, Hefei 230026, Peoples R China
[5] Fujian Med Univ, Mengchao Hepatobiliary Hosp, Fuzhou 350025, Peoples R China
基金
中国国家自然科学基金;
关键词
CHECKPOINT BLOCKADE; CANCER; RNA; INTERFERENCE; POTENT;
D O I
10.1016/j.ymthe.2023.04.011
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Growing evidence has proved that RNA editing enzyme ADAR1, responsible for detecting endogenous RNA species, was significantly associated with poor response or resistance to immune checkpoint blockade (ICB) therapy. Here, a genetically engineered nanovesicle (siAdar1-LNP@mPD1) was developed as an RNA interference nano-tool to overcome tumor resistance to ICB therapies. Small interfering RNA against ADAR1 (siA-dar1) was packaged into a lipid nanoparticle (LNP), which was further coated with plasma membrane extracted from the genetically engineered cells overexpressing PD1. siAdar1-LNP@mPD1 could block the PD1/PDL1 immune inhibitory axis by presenting the PD1 protein on the coating membranes. Furthermore, siAdar1 could be effectively delivered into cancer cells by the designed nanovesicle to silence ADAR1 expression, resulting in an increased type I/II interferon (IFN-b/g) produc-tion and making the cancer cells more sensitive to secreted effector cytokines such as IFN-g with significant cell growth ar-rest. These integrated functions confer siAdar1-LNP@mPD1 with robust and comprehensive antitumor immunity, as evi-denced by significant tumor growth regression, abscopal tumor prevention, and effective suppression of lung metastasis, through a global remodeling of the tumor immune microenvi-ronment. Overall, we provided a promising translatable strategy to simultaneously silence ADAR1 and block PDL1 immune checkpoint to boost robust antitumor immunity.
引用
收藏
页码:2489 / 2506
页数:18
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