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• W3135910912 abstract "Zirconia nanoparticles (ZrO 2 NPs) are commonly used in the field of biomedical materials, but their antitumor activity and mechanism is unclear. Herein, we evaluated the anti-tumor activity of ZrO 2 NPs and explored the anti-tumor mechanism. The results of in vitro and in vivo experiments showed that the level of intracellular reactive oxygen species (ROS) in HeLa cells was elevated after ZrO 2 NPs treatment. Transmission electron microscopy (TEM) showed that after treatment with ZrO 2 NPs, the mitochondria of HeLa cells were swollen, accompanied with the induction of autophagic vacuoles. In addition, flow cytometry analysis showed that the apoptotic rate of HeLa cells increased significantly by Annexin staining after treatment with ZrO 2 NPs, and the mitochondrial membrane potential (MMP) was reduced significantly. The proliferation of HeLa cells decreased as indicated by reduced Ki-67 labeling. In contrast, TUNEL-positive cells in tumor tissues increased after treatment with ZrO 2 NPs, which is accompanied by increased expression of mitochondrial apoptotic proteins including Bax, Caspase-3, Caspase-9, and Cytochrome C (Cyt C) and increased expression of autophagy-related proteins including Atg5, Atg12, Beclin-1, and LC3-II. Treating HeLa cells with N-acetyl-L-cysteine (NAC) significantly reduced ROS, rate of apoptosis, MMP, and in vivo anti-tumor activity. In addition, apoptosis- and autophagy-related protein expressions were also suppressed. Based on these observations, we conclude that ZrO 2 NPs induce HeLa cell death through ROS mediated mitochondrial apoptosis and autophagy." @default.
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• W3135910912 date "2021-03-16" @default.
• W3135910912 modified "2023-09-26" @default.
• W3135910912 title "Zirconia Nanoparticles Induce HeLa Cell Death Through Mitochondrial Apoptosis and Autophagy Pathways Mediated by ROS" @default.
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• W3135910912 doi "https://doi.org/10.3389/fchem.2021.522708" @default.
• W3135910912 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8007972" @default.
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