放射治疗
癌症研究
肿瘤微环境
体内
谷胱甘肽
化学
酶
生物化学
医学
生物
肿瘤细胞
内科学
生物技术
作者
Shiyan Fu,Yi Li,Ли Шен,Yong-lai Chen,Jiang Lu,Yonghong Ran,Ye Zhao,Hong Tang,Longfei Tan,Qinyang Lin,Yuhui Hao
出处
期刊:Small
[Wiley]
日期:2024-02-07
标识
DOI:10.1002/smll.202309537
摘要
Abstract Unavoidable damage to normal tissues and tumor microenvironment (TME) resistance make it challenging to eradicate breast carcinoma through radiotherapy. Therefore, it is urgent to develop radiotherapy sensitizers that can effectively reduce radiation doses and reverse the suppressive TME. Here, a novel biomimetic PEGylated Cu 2 WS 4 nanozyme (CWP) with multiple enzymatic activities is synthesized by the sacrificing template method to have physical radiosensitization and biocatalyzer‐responsive effects on the TME. Experiment results show that CWP can improve the damage efficiency of radiotherapy on breast cancer cell 4T1 through its large X‐ray attenuation coefficient of tungsten and nucleus‐penetrating capacity. CWP also exhibit strong Fenton‐like reactions that produced abundant ROS and GSH oxidase‐like activity decreasing GSH. This destruction of redox balance further promotes the effectiveness of radiotherapy. Transcriptome sequencing reveals that CWP induced ferroptosis by regulating the KEAP1/NRF2/HMOX1/GPX4 molecules. Therefore, owing to its multiple enzymatic activities, high‐atomic W elements, nucleus‐penetrating, and ferroptosis‐inducing capacities, CWP effectively improves the efficiency of radiotherapy for breast carcinoma in vitro and in vivo. Furthermore, CWP‐mediated radiosensitization can trigger immunogenic cell death (ICD) to improve the anti‐PD‐L1 treatments to inhibit the growth of primary and distant tumors effectively. These results indicate that CWP is a multifunctional nano‐sensitizers for radiotherapy and immunotherapy.
科研通智能强力驱动
Strongly Powered by AbleSci AI