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- W3193233676 abstract "Photodynamic therapy (PDT) of tumor has achieved good results, but the treatment efficiency is not high due to the lack of effective photosensitizers and tumor hypoxia. In this study, iridium dioxide nanoparticles (IrO2 NPs) with excellent photothermal/photodynamic effects and catalase like activity were synthesized by a simple method. The combination of glucose oxidase (GOx) and IrO2 NPs is formed by hyaluronic acid (HA), which have the activities of glucose oxidase and catalase, can target tumor sites and form in situ amplifiers in tumor microenvironment (IrO2-GOx@HA NPs). Firstly, GOx convert the high levels of glucose in the tumor to hydrogen peroxide (H2O2), and then IrO2 NPs convert H2O2 to oxygen (O2), which can enhance the type II of PDT. IrO2 NPs also can be used as a thermosensitive agent for photothermal therapy (PTT). In cancer cells, IrO2-GOx@HA NPs-mediated amplifier enhances the effect of type II of PDT, aggravating the apoptosis of breast cancer (4T1) cells and cooperating with its own PTT to further improve the overall treatment effect. Under simulated hypoxic conditions of tumor tissue, it was found that IrO2-GOx@HA NPs treatment can effectively relieve hypoxia inside tumor tissue. In addition, the results in vivo further proved that, IrO2-GOx@HA NPs can enhance the role of II PDT and cooperate with PTT to treat breast cancer effectively. The results highlight the prospect of IrO2-GOx@HA NPs in controlling and regulating tumor hypoxia to overcome the limitations of current cancer therapy." @default.
- W3193233676 created "2021-08-16" @default.
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- W3193233676 date "2022-01-01" @default.
- W3193233676 modified "2023-10-15" @default.
- W3193233676 title "Iridium oxide nanoparticles mediated enhanced photodynamic therapy combined with photothermal therapy in the treatment of breast cancer" @default.
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- W3193233676 doi "https://doi.org/10.1016/j.jcis.2021.07.136" @default.
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