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- W3014053238 abstract "Radiotherapy is usually accompanied by side effects to healthy tissue and radiation resistance of tumor cells in clinical application. Therefore, how to enhance radiation effect and reduce radiation resistance is the key problem to enhance radiotherapy efficacy. In recent years, the development of nanomaterials with radiation catalysis function has provided us with opportunities. Here, we report a radiocatalytic platform using inorganic semiconductor nanoheterojunctions WO3@Ag2WO4@chitosan (WO3@Ag2WO4@CS) as radiation sensitizers to improve the radiotherapeutic effect of tumors by enhancing radiosensitization and reducing radioresistance. On one hand, WO3@Ag2WO4@CS with a higher atomic number has better X-ray absorptivity and can deposit a large amount of radiation dose upon X-ray irradiation. In addition, due to the heterojunction structure, a large number of electron-hole pairs can be generated and separated under X-ray trigger. The WO3@Ag2WO4@CS nanoheterojunctions thus can effectively decompose the surrounding hydrogen peroxide/water into free radicals to kill cancer cells by electron-hole pairs. On the other hand, WO3@Ag2WO4@CS nanoheterojunctions also have the ability to consume intracellular GSH through redox reaction, leading to increased ROS level and reduced radioresistance. Our study provides a novel nanoradiosensitizer that can improve the radiotherapeutic efficacy by enhancing the radiation response and reducing radioresistance of tumors." @default.
- W3014053238 created "2020-04-03" @default.
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- W3014053238 date "2020-08-01" @default.
- W3014053238 modified "2023-10-18" @default.
- W3014053238 title "Semiconductor heterojunction-based radiocatalytic platforms for tumors treatment by enhancing radiation response and reducing radioresistance" @default.
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- W3014053238 doi "https://doi.org/10.1016/j.cej.2020.124872" @default.
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