1. Smart Nanosensitizers for Activatable Sono‐Photodynamic Immunotherapy of Tumors by Redox‐Controlled Disassembly
- Author
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Lingjun Liu, Junya Zhang, Ruibing An, Qi Xue, Xi Cheng, Yuxuan Hu, Zheng Huang, Luyan Wu, Wenhui Zeng, Yinxing Miao, Jie Li, Yu Zhou, Hong‐Yuan Chen, Hong Liu, and Deju Ye
- Subjects
General Medicine ,General Chemistry ,Catalysis - Abstract
Tumor-targeted and stimuli-activatable nanosensitizers are highly desirable for cancer theranostics. However, design of smart nanosensitizers with multiple imaging signals and synergistic therapeutic activities switched on is challenging. Herein, we report tumor-targeted and redox-activatable nanosensitizers (1-NPs) for sono-photodynamic immunotherapy of tumors by molecular co-assembly and redox-controlled disassembly. 1-NPs show a high longitudinal relaxivity (r1 = 18.7 ± 0.3 mM-1 s-1), but "off" dual fluorescence (FL) emissions (at 547 and 672 nm), "off" sono-photodynamic therapy and indoleamine 2,3-dioxygenase 1 (IDO1) inhibition activities. Upon reduction by glutathione (GSH), 1-NPs rapidly disassemble and remotely release small molecules 2-Gd, Zn-PPA-SH and NLG919, concurrently switching on (1) dual FL emissions, (2) sono-photodynamic therapy and (3) IDO1 inhibition activities. After systemic injection, 1-NPs are effective for bimodal FL and magnetic resonance (MR) imaging-guided sono-photodynamic immunotherapy of orthotropic breast and brain tumors in mice under combined ultrasound (US) and 671-nm laser irradiation.
- Published
- 2023