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- W2056195849 abstract "Cadmium is known to exhibit high affinity for thiol groups and may therefore severely disturb many cellular functions. We have demonstrated that the control of mitochondrial redox balance and oxidative damage is one of the primary functions of mitochondrial NADP<sup>+</sup>-dependent isocitrate dehydrogenase (IDPm). When exposed to cadmium, IDPm was susceptible to loss of enzyme activity and structural alterations. Site-directed mutagenesis confirms that binding of cadmium occurs to a Cys<sup>379</sup> of IDPm. We examined the antioxidant mechanism-mediated protective role of IDPm against cadmium-induced apoptosis with human embryonic kidney 293 cells transfected with the IDPm cDNA in sense and antisense orientations. As a result, we observed a clear inverse relationship between the amount of IDPm expressed in target cells and their susceptibility to cadmium-induced modulation of cellular redox status and apoptosis. In addition, loss of glutaredoxin (Grx, thioltransferase) activity by cadmium was more pronounced in antisense cells compared with the sense cells. When oxalomalate, a competitive inhibitor of IDPm, was administered to mice, inhibition of IDPm and Grx and enhanced susceptibility to apoptosis were observed upon their exposure to cadmium. These results suggest that IDPm plays an important protective role in cadmium-induced apoptosis by maintaining cellular redox status and by protection of Grx activity." @default.
- W2056195849 created "2016-06-24" @default.
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- W2056195849 date "2006-06-19" @default.
- W2056195849 modified "2023-09-25" @default.
- W2056195849 title "Mitochondrial NADP<sup>+</sup>-Dependent Isocitrate Dehydrogenase Protects Cadmium-Induced Apoptosis" @default.
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- W2056195849 doi "https://doi.org/10.1124/mol.106.023515" @default.
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