Adv Mater. 2022 Feb 17.
e2109969
Lei Sun,
Jing-E Zhou,
Tengshuo Luo,
Jing Wang,
Liqing Kang,
Yeying Wang,
Shenggen Luo,
Zhehao Wang,
Ziyu Zhou,
Jiaxi Zhu,
Jiahui Yu,
Lei Yu,
Zhiqiang Yan.
The rapid evolution of cell-based theranostics has attracted extensive attention due to their unique advantages in biomedical applications. However, only the inherent functions of cells cannot meet the needs of malignant tumor treatment. Thus endowing original cells with new characteristics to generate multifunctional living cells may hold a tremendous promise. Here, for the first time, we used the nanoengineering method to combine customized liposomes with neutrophils, generating oxygen-carrying sonosensitizer cells with acoustic functions, which we called Acouscyte/O2 , for the visual diagnosis and treatment of cancer. Specifically, oxygen-carried perfluorocarbon and temoporfin were encapsulated into cRGD peptide modified multilayer liposomes (C-ML/HPT/O2 ), which were then loaded into live neutrophils to obtain Acouscyte/O2 . Acouscyte/O2 could not only carry a large amount of oxygen but also exhibit the ability of long circulation, inflammation triggered recruitment and decomposition. Importantly, Acouscyte/O2 could be selectively accumulated in tumors, effectively enhanced tumor oxygen levels, and triggered anticancer sonodynamics in response to ultrasound stimulation, leading to completely obliterating tumors and efficiently extending survival time of tumor-bearing mice with minimal systemic adverse effects. Meanwhile, the tumors could be real-time monitored by temoporfin-mediated fluorescence imaging and PFC-microbubble enhanced ultrasound imaging. Therefore, the nanoengineered neutrophils, i.e., Acouscyte/O2 , were a new type of multifunctional cellular drug, which provides a new platform for the diagnosis and sonodynamic therapy of solid malignant tumors. This article is protected by copyright. All rights reserved.
Keywords: malignant tumors; multimode imaging; nanoengineered neutrophils; sonodynamic therapy; sonosensitizer