Abstract
Nicotinamide adenine dinucleotide (NAD+) plays critical roles in energy metabolism, mitochondrial functions, calcium homeostasis and immunological functions. Our previous studies have found that NAD+ administration can profoundly decrease ischemic brain injury and traumatic brain injury. Our recent study has also provided first direct evidence indicating that NAD+ treatment can decrease cellular apoptosis, while the mechanisms underlying this protective effect remain unclear. In our current study, we determined the effects of NAD+ treatment on several major factors in apoptosis and necrosis, including levels of Bax and nuclear translocation of apoptosis-inducing factor (AIF), as well as levels of DNA double-strand breaks (DSBs) and intracellular ATP in rotenone-treated differentiated PC12 cells. We found that NAD+ treatment can markedly attenuate the rotenone-induced increases in the levels of Bax and nuclear translocation of AIF in the cells. We further found that NAD+ treatment can significantly attenuate the rotenone-induced increase in the levels of DSBs and decrease in the intracellular ATP levels. Collectively, our study has suggested mechanisms underlying the preventive effects of NAD+ on apoptosis, which has highlighted the therapeutic potential of NAD+ for decreasing apoptotic changes in multiple major diseases.
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Acknowledgments
This study was supported by Chinese National Science Foundation Grants #81171098 and #81271305 (to W. Y.), and two Shanghai Jiao Tong University Grants for Interdisciplinary Research on Medicine and Engineering (to W. Y.).
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Hong, Y., Nie, H., Wei, X. et al. NAD+ Treatment Can Prevent Rotenone-Induced Increases in DNA Damage, Bax Levels and Nuclear Translocation of Apoptosis-Inducing Factor in Differentiated PC12 Cells. Neurochem Res 40, 837–842 (2015). https://doi.org/10.1007/s11064-015-1534-0
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DOI: https://doi.org/10.1007/s11064-015-1534-0