1
|
Bai S, Yang N, Wang X, Gong F, Dong Z, Gong Y, Liu Z, Cheng L. Ultrasmall Iron-Doped Titanium Oxide Nanodots for Enhanced Sonodynamic and Chemodynamic Cancer Therapy. ACS Nano 2020; 14:15119-15130. [PMID: 33185089 DOI: 10.1021/acsnano.0c05235] [Citation(s) in RCA: 138] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Sonodynamic therapy (SDT), which can generate reactive oxygen species (ROS) based on sonosensitizers under ultrasound (US) to kill tumor cells, has emerged as a noninvasive therapeutic modality with high tissue-penetration depth. Herein, ultrasmall iron-doped titanium oxide nanodots (Fe-TiO2 NDs) are synthesized via a thermal decomposition strategy as a type of sonosensitizers to enhance SDT. Interestingly, the Fe doping in this system appears to be crucial in not only enhancing the US-triggered ROS generation of those NDs but also offering NDs the Fenton-catalytic function to generate ROS from tumor endogenous H2O2 for chemodynamic therapy (CDT). After polyethylene glycol (PEG) modification, Fe-TiO2-PEG NDs demonstrate good physiological stability and biocompatibility. With efficient tumor retention after intravenous injection as revealed by in vivo magnetic resonance (MR) and fluorescent imaging, our Fe-TiO2 NDs demonstrate much better in vivo therapeutic performance than commercial TiO2 nanoparticles owing to the combination of CDT and SDT. Moreover, most of those ultrasmall Fe-TiO2 NDs can be effectively excreted within one month, rendering no obvious long-term toxicity to the treated mice. Our work thus presents a type of multifunctional sonosensitizer for highly efficient cancer treatment via simply doping TiO2 nanostructures with metal ions.
Collapse
Affiliation(s)
- Shang Bai
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Nailin Yang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Xianwen Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Fei Gong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Ziliang Dong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Yuehan Gong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| | - Liang Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, People's Republic of China
| |
Collapse
|