期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 37, 页码 41047-41061出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c10685
关键词
O-2-generating; H2O2-activatable; bio-photocatalyst; mesoporous tin oxide; synergistic treatment
资金
- National Natural Science Foundation of China [NSFC 51972075, 51772059, 51972076]
- Natural Science Foundation of Shandong Province [ZR2019ZD29]
- China Postdoctoral Foundation [2020M670884]
- Heilongjiang Postdoctoral Foundation [LBH-Z19129]
- Fundamental Research Funds for the Central Universities [3072020CF2522]
Tumor hypoxia compromises the therapeutic efficacy of oxygen (O-2)-dependent treatment methods as the endogenous O-2 levels have an important influence on the production of reaction oxygen species. Herein, a synergistic multifunctional mesoporous Fe@Sn-UCNPs biophotocatalytic nanoplatform is provided to comprehensively realize endogenous hydrogen peroxide (H2O2)-activatable, self-supplied O-2, photothermal performance, and near-infrared-mediated magnetic targeting PDT/PTT simultaneously for relieving tumor hypoxia. Such a nanoplatform is constructed by encapsulating magnetic Fe3O4 with lanthanide-ion-doped mesoporous tin oxide upconversion nanoparticles and further modified with phosphorylated serine and poly(ethylene glycol) for enhancing the biocompatibility and solubility. The nanoparticles can be activated by endogenous H2O2 and in situ generated O-2 to relieve hypoxia through catalytic reaction. Therefore, H2O2-responsive/O-2-evolving nanoparticles can elevate the O-2 level in the tumor site for an apparently enhanced PDT effect in vitro and in vivo. What is more, Fe@Sn-UCNPs demonstrate enhanced photothermal conversion efficiency based on the special nanostructure and much more circuit loops for electron transitions between Fe3O4 and Sn-UCNPs, and the electronic structure of Fe@Sn-UCNPs was calculated. In addition, such Fe@Sn-UCNPs also exhibit multimodality imaging performance (including photothermal, magnetic resonance, and computed tomography imaging) for monitoring and tracking the in vivo tumor therapeutic process. This work provides novel insight into the smart Fe@Sn-UCNPs as an all-in-one theranostic nanosystem for cancer therapy.
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