Journal
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
Volume 18, Issue -, Pages 272-281Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nano.2019.02.016
Keywords
Reactive oxygen species; TiO2 nanoparticles; Osteosarcoma; Microdynamic therapy
Funding
- National Natural Science Foundation of China [31771038, 51472013, 51672106]
- National Key Research and Development Program of China [2017YFB0702604, 2016YFB0700803]
- NIH/NCI [1R15CA199020-01A1]
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Radical therapy takes advantage of the reactive oxygen species produced in greater quantities within tumor cells than in normal cells. Here, for the first time, we explore a TiO2 nanoparticle mediated microwave induced radical therapy (tenned as Microdynamic Therapy) as a new cancer treatment method. The experiments in vitro and in vivo demonstrate that colloidal TiO2 nanoparticles could significantly suppress the growth of osteosarcomas, even under low power (5 W) microwave (MW) irradiation for 5 min. The high photocatalytic activity of TiO2 nanoparticles efficiently utilizes the microwave-induced plasmonic effect for the formation of reactive oxygen species (ROS). Furthermore, TiO2 nanoparticles exhibit a higher cytotoxicity on cancer cells (osteosarcorna UMR-106 cells) than on normal cells (mouse fibroblast L929 cells). The effectiveness of TiO2 nanoparticles for microwave induced radical therapy demonstrates that this is a new landmark approach to treating cancers. (C) 2019 Elsevier Inc. All rights reserved.
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