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• W4324316398 abstract "Conventional NO gas generation based on l-arginine (l-Arg) is usually dependent on H2O2 and O2, both of which are very limited within the tumor microenvironment, thus greatly limiting l-Arg's therapeutic effect. Herein, a novel nanoplatform for efficiently triggering NO production based on ultrasound-induced piezocatalysis was developed, which was fabricated by coating amphiphilic poly-l-arginine (DSPE-PEG2000-Arg, DPA) on the piezoelectric material of barium titanate (BTO). The resulting BTO@DPA nanoparticles can efficiently generate H2O2, 1O2, and O2 via ultrasound-induced piezocatalysis based on BTO and oxidize the surface arginine to produce NO, which can even further interact with the reactive oxygen species (ROS) to produce more reactive peroxynitrite, thus inducing serious tumor cell apoptosis both in hypoxia and normoxia. After intravenous injection, BTO@DPA accumulated well at the tumor tissue at 4 h postinjection; later, ultrasound irradiation on the tumor not only achieved the best tumor inhibition rate of ∼70% but also completely inhibited tumor metastasis to the lungs via the alleviation of tumor hypoxia. Such a strategy was not dependent on the tumor microenvironment and can be well controlled by ultrasound irradiation, providing a simple and efficient therapy paradigm for hypoxic tumor." @default.
• W4324316398 created "2023-03-16" @default.
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• W4324316398 date "2023-03-15" @default.
• W4324316398 modified "2023-10-18" @default.
• W4324316398 title "Ultrasound-Induced Piezocatalysis Triggered NO Generation for Enhanced Hypoxic Tumor Therapy" @default.
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• W4324316398 doi "https://doi.org/10.1021/acsami.3c00603" @default.
• W4324316398 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36922152" @default.
• W4324316398 hasPublicationYear "2023" @default.
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