Abstract
Oncolytic viruses have emerged as new powerful therapeutic agents for cancer therapy by specifically lysing cancer cells while activating innate immune responses at the same time. However, due to the thorny issues of safety concerns and host immune reaction, the clinical application of oncolytic viruses is still limited. Herein, we report a rationally designed oncolytic virus-like nanoparticles (OV-NPs) composed of stimulator of interferon genes (STING)-stimulating polymer loaded with therapeutic genes for cancer immunotherapy. After injection into tumor, the OV-NPs carrying OX40L plasmid could reprogram tumor cells to express OX40L immune checkpoint molecules and activate the STING pathway for cooperatively enhancing antitumor immunity, with a tumor suppression rate of 92.3% in B16F10 tumor model and 78.7% in MC38 tumor model without causing any toxicity. The OV-NPs could be further applied in carrying other plasmids (IL-12) and utilization in gene combination therapy. This study should inspire designing synthetic OV-NPs as alternative strategies for extending oncolytic virus application in cancer immunotherapy.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (22222509, 52025035, 51973215, 22375198, 52103194), Bureau of International Cooperation Chinese Academy of Sciences (121522KYSB20200029), Jilin Province Science and Technology Development Plan (YDZJ202101ZYTS131, 20220402037GH, 20210508049RQ), Jilin Provincial International Cooperation Key Laboratory of Biomedical Polymers (20210504001GH), Changchun Science and Technology Development Plan (21ZY09, 21ZGY30), the China Post-doctoral Science Foundation (E21S2101), the Youth Talents Promotion Project of Jilin Province (QT202103), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (2020232).
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Gao, Y., Zhao, H., Zhao, J. et al. Polymer-based synthetic oncolytic virus-like nanoparticles for cancer immunotherapy. Sci. China Chem. 66, 3576–3586 (2023). https://doi.org/10.1007/s11426-023-1841-8
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DOI: https://doi.org/10.1007/s11426-023-1841-8