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WO3/Pt nanoparticles are NADPH oxidase biomimetics that mimic effector cells in vitro and in vivo

机译:WO3 / Pt纳米颗粒是NADPH氧化酶仿生物,可在体外和体内模拟效应细胞

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摘要

To provide a means of delivering an artificial immune effector cell-like attack on tumor cells, we report the tumoricidal ability of inorganic WO3/Pt nanoparticles that mimic a leukocyte's functional abilities. These nanoparticles route electrons from organic structures and electron carriers to form hydroxyl radicals within tumor cells. During visible light exposure, WO3/Pt nanoparticles manufacture hydroxyl radicals, degrade organic compounds, use NADPH, trigger lipid peroxidation, promote lysosomal membrane disruption, promote the loss of reduced glutathione, and activate apoptosis. In a model of advanced breast cancer metastasis to the eye's anterior chamber, we show that WO3/Pt nanoparticles prolong the survival of 4T1 tumor-bearing Balb/c mice. This new generation of inorganic photosensitizers do not photobleach, and therefore should provide an important therapeutic advance in photodynamic therapy. As biomimetic nanoparticles destroy targeted cells, they may be useful in treating ocular and other forms of cancer.
机译:为了提供一种对肿瘤细胞进行人工免疫效应细胞样攻击的方法,我们报道了模仿白细胞功能能力的无机WO3 / Pt纳米颗粒的杀肿瘤能力。这些纳米粒子将电子从有机结构和电子载体中转移出来,从而在肿瘤细胞内形成羟基自由基。在可见光照射期间,WO3 / Pt纳米颗粒可制造羟基自由基,降解有机化合物,使用NADPH,触发脂质过氧化作用,促进溶酶体膜破裂,促进还原型谷胱甘肽的损失并激活细胞凋亡。在晚期乳腺癌转移到眼睛前房的模型中,我们显示WO3 / Pt纳米颗粒延长了4T1荷瘤Balb / c小鼠的生存期。新一代的无机光敏剂不会光漂白,因此应在光动力疗法中提供重要的治疗进展。由于仿生纳米颗粒破坏了靶细胞,它们可用于治疗眼癌和其他形式的癌症。

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