ZnO Quantum Dots Induced Oxidative Stress and Apoptosis in HeLa and HEK-293T Cell Lines

ZnO Quantum Dots Induced Oxidative Stress and Apoptosis in HeLa and HEK-293T Cell Lines
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ZnO量子点诱导HeLa和HEK-293T细胞系氧化应激和细胞凋亡

DOI:
10.3389/fphar.2020.00131
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发表时间:
2020-02
影响因子:
5.6
通讯作者:
Shaoping Ji
Shaoping Ji
中科院分区:
医学2区
文献类型:
--
作者:
Yanjie Yang;Zhenhua Song;Weixia Wu;Ao Xu;Shuangyu Lv;Shaoping Ji

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氧化锌(ZnO)量子点(QD)是一种很有前途的廉价无机纳米材料,在生物医学应用之前,必须评估其对生物系统和人类健康的潜在毒性作用。在这项研究中,使用HeLa宫颈癌细胞和HEK-293 T人胚肾细胞系评估ZnO量子点的细胞毒性。用50 μg/ml ZnO量子点处理仅6小时后,细胞活力显著降低,并且ZnO量子点在HEK-293 T中的细胞毒性高于HeLa细胞。ZnO量子点以剂量依赖性方式增加活性氧水平,降低线粒体膜电位。ZnO量子点可调控凋亡相关基因的表达,包括bcl-2基因和caspase。在HeLa细胞中,ZnO QDs显著增加早期和晚期凋亡,但在HEK-293 T细胞中仅影响晚期凋亡。这些发现将有助于ZnO量子点在生物医学领域的进一步研究和应用。
Zinc oxide (ZnO) quantum dot (QD) is a promising inexpensive inorganic nanomaterials, of which potential toxic effects on biological systems and human health should be evaluated before biomedical application. In this study, the cytotoxicity of ZnO QDs was assessed using HeLa cervical cancer cell and HEK-293T human embryonic kidney cell lines. Cell viability was significantly decreased by treatment with 50 µg/ml ZnO QDs after only 6 h, and the cytotoxicity of ZnO QDs was higher in HEK-293T than in HeLa cells. ZnO QDs increased the level of reactive oxygen species and decreased the mitochondria membrane potential in a dose-dependent manner. Several gene expression involved in apoptosis was regulated by ZnO QDs, including bcl-2 gene and caspase. In HeLa cells, ZnO QDs significantly increased early and late apoptosis, but only late apoptosis was affected in HEK-293T cells. These findings will be helpful for future research and application of ZnO QDs in biomedicine.
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