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• W1998373588 abstract "Cellular oxidative stress and alterations in redox metabolisms have been implicated in the etiology and pathology of many diseases including cancer. Antioxidant treatments have been proven beneficial in controlling these diseases. We have recently shown that 4-hydroxynonenal (4-HNE), a by-product of lipid peroxidation, induces oxidative stress in PC12 cells by compromising the mitochondrial redox metabolism. In this study, we have further investigated the deleterious effects of 4-HNE on mitochondrial respiratory functions and apoptosis using the same cell line. In addition, we have also compared the effects of two antioxidants, curcumin and melatonin, used as chemopreventive agents, on mitochondrial redox metabolism and respiratory functions in these cells. 4-HNE treatment has been shown to cause a reduction in glutathione (GSH) pool, an increase in reactive oxygen species (ROS), protein carbonylation and apoptosis. A marked inhibition in the activities of the mitochondrial respiratory enzymes, cytochrome c oxidase and aconitase was observed after 4-HNE treatment. Increased nuclear translocation of NF-kB/p65 protein was also observed after 4-HNE treatment. Curcumin and melatonin treatments, on the other hand, maintained the mitochondrial redox and respiratory functions without a marked effect on ROS production and cell viability. These results suggest that 4-HNE-induced cytotoxicity may be associated, at least in part, with the altered mitochondrial redox and respiratory functions. The alterations in mitochondrial energy metabolism and redox functions may therefore be critical in determining the difference between cell death and survival." @default.
• W1998373588 created "2016-06-24" @default.
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• W1998373588 date "2008-01-01" @default.
• W1998373588 modified "2023-09-29" @default.
• W1998373588 title "Alterations in mitochondrial respiratory functions, redox metabolism and apoptosis by oxidant 4-hydroxynonenal and antioxidants curcumin and melatonin in PC12 cells" @default.
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• W1998373588 doi "https://doi.org/10.1016/j.taap.2007.09.002" @default.
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