Zinc oxide nanoparticles induce murine photoreceptor cell death via mitochondria-related signaling pathway

Artificial Cells, Nanomedicine, and Biotechnology
Ling WangDadong Guo

Abstract

Zinc oxide (ZnO) nanoparticles can exhibit toxic effect on cells and tissues, which may be involved in the excessive generation of reactive oxygen species (ROS) and the consequent mitochondria-mediated apoptotic pathway. Nevertheless, the detailed mechanism remains unclear. In this study, we explored the effects of ZnO nanoparticles on the expressions of cytochrome c, ATP level, mitochondrial membrane potential, ROS, apoptosis, total antioxidant enzyme activities and apoptotic-related protein levels in murine photoreceptor cells as well as the changes of proteomic profiling. Moreover, we also performed the bioinformatics analysis for the differentially expressed proteins. Our results show that ZnO nanoparticles induce the release of cytochorme c, decrease the intracellular ATP level, collapse the mitochondrial membrane potential, elevate the ROS level, inhibit total antioxidant enzyme activities and increase the Bax and Caspase 3 levels whereas it decrease the Bcl-2 expression, leading to cell death. Proteomic analysis reveals the differentially expressed proteins are involved in cytochrome c oxidase activity and oxidative phosphorylation. Protein-protein interaction analysis confirms the differentially expressed proteins are c...Continue Reading

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Citations

Nov 13, 2019·The Science of the Total Environment·Daming WuTing Zhang
Jul 5, 2021·European Journal of Pharmacology·Dadong GuoHongsheng Bi
Aug 22, 2021·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·Jing WenYongjiang Li

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