期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 51, 页码 56874-56885出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c16548
关键词
NSCLC cell lines; AGuIX nanoparticles; irradiation; radiosensitization effect; DNA damage repair
资金
- National Natural Science Foundation of China [31670859, 31971168, 31800703]
- Fundamental Research Funds for the Central Universities [3332018158]
- CAMS Innovation Fund for Medical Science [2017-I2M-1-016]
- China Postdoctoral Science Foundation [2018M630106]
- Natural Science Foundation of Tianjin [18JCYBJC26800, 18JCQNJC12300]
- Nonprofit Central Research Institute Fund of Chinese Academy of Medical Sciences [2017-1001-08]
Radiotherapy is the main treatment for cancer patients. A major concern in radiotherapy is the radiation resistance of some tumors, such as human nonsmall cell lung cancer. However, the radiation dose delivered to the tumors is often limited by the possibility of collateral damage to surrounding healthy tissues. A new and efficient gadolinium-based nanoparticle, AGuIX, has recently been developed for magnetic resonance imaging-guided radiotherapy and has been proven to act as an efficient radiosensitizer. The amplified radiation effects of AGuIX nanoparticles appear to be due to the emission of low-energy photoelectrons and Auger electron interactions. We demonstrated that AGuIX nanoparticles exacerbated radiation-induced DNA double-strand break damage and reduced DNA repair in the H1299 nonsmall cell lung cancer cell line. Furthermore, we observed a significant improvement in tumor cell damage and growth suppression, under radiation therapy, with the AGuIX nanoparticles in a H1299 mouse xenograft model. This study paves the way for research into the radiosensitization mechanism of AGuIX nanoparticles and provides a scientific basis for the use of AGuIX nanoparticles as radiosensitizing drugs.
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