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Nano Research

Article Title

Stimuli-responsive combination therapy of cisplatin and Nrf2 siRNA for improving antitumor treatment of osteosarcoma

Authors

Ting-Ting Gu, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Chengjun Li, Jinling Hospital, Department of Orthopedics, School of medicine, Nanjing University, Nanjing 210002, China
Yurui Xu, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Lei Zhang, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Xue Shan, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Xinyu Huang, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Leilei Guo, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Kerong Chen, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Xiaojian Wang, Institute of advanced synthesis, Nanjing Tech University, Nanjing 210093, China
Haixiong Ge, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
Xinghai Ning, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China Chemstry and Biomedicine Innovation Center (ChemBIC), Nanjing University, Nanjing 210093, China

Keywords

stimuli-responsive liposome, Nrf2 siRNA, ROS, osteosarcoma, combination therapy

Abstract

Cisplatin is a widely applied therapeutics for the treatment of osteosarcoma. However, its clinical applications have been hindered due to low efficacy and bioavailability, and particularly frequent emergence of reactive oxygen species (ROS)-decrease induced drug resistance. The transcription factor NF-E2-related factor 2 (Nrf2) is increased in cancer patients and induces poor outcome in osteosarcoma treatment, making it a novel target to improve the efficacy of chemotherapy. Herein, a hyaluronidase-responsive multi-layer liposome (HLCN) for co-delivery of cisplatin and Nrf2 siRNA (siNrf2) is developed. It is composed of Vpr52-96 modified liposome covered with hyaluronic acid (HA). HLCN selectively accumulates in osteosarcoma by targeting tumor-specific CD44, and can be degraded by endosomal hyaluronidase to generate cationic liposome, which promotes the endosomal escape of Vpr52-96, cisplatin and siNrf2. HLCN can effectively decrease Nrf2 level, promote ROS generation, activate itochondrial apoptotic pathway, and consequently enhance anticancer efficacy of cisplatin. Particularly, HLCN shows high cytotoxicity to osteosarcoma cells with an IC50 value of about 1 μM, which is four-fold lower than liposomal cisplatin (IC50 4 μM), indicating that Nrf2 silence can significantly improve cisplatin sensitivity in cancer cells. Importantly, HLCN can remarkably inhibit tumor growth in the xenograft osteosarcoma mice with minimal systemic adverse effects. Therefore, this novel stimuli-responsive combination therapy of cisplatin and siNrf2 provides a promising strategy for the treatment of osteosarcoma.

Graphical Abstract

Publisher

Tsinghua University Press

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