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- W2068335282 abstract "<i>Background:</i> The aim of this work was to characterize the relationship between zinc (Zn<sup>2+</sup>) and cadmium (Cd<sup>2+</sup>) and the toxic effects of Cd<sup>2+</sup> in immortalized renal proximal tubule cells RP1. <i>Methods:</i> An RP1 cell line was developed from primary cultures of microdissected S1 and S2. Uptakes of <sup>65</sup>Zn and <sup>109</sup>Cd and competitive experiments with Cd<sup>2+</sup> and Zn<sup>2+</sup> were performed and kinetic parameters were determined. Oxygen consumption, metallothionein synthesis, and necrotic and apoptotic phenomena were studied. <i>Results:</i> Kinetic parameters indicate that <sup>65</sup>Zn (Km = 71.8 ± 10.6 µ<i>M</i>) and <sup>109</sup>Cd (Km = 23.3 ± 2.0 µ<i>M</i>) were both transported by a saturable carrier-mediated process. Competition between Cd<sup>2+</sup> and Zn<sup>2+</sup> uptake was reciprocal. Cd<sup>2+</sup> induced an increase in necrosis and apoptosis, and a decrease in oxygen consumption, depending on Cd<sup>2+</sup> concentrations. Concomitant addition of Zn<sup>2+</sup> (10 µ<i>M</i>) reduced the number of necrotic and apoptotic cells and maintained oxygen consumption at control levels. Cd<sup>2+</sup> alone, or in the presence of Zn<sup>2+</sup>, increased metallothionein levels, whereas Zn<sup>2+</sup> alone did not. <i>Conclusion:</i> Zn<sup>2+</sup> and Cd<sup>2+</sup> probably share the same transporter in the proximal tubule. Cd<sup>2+</sup> caused necrotic and apoptotic cell death. Cd<sup>2+</sup> toxicity may occur through an effect on the mitochondrial electron transport chain and not on metallothionein synthesis. Zn<sup>2+</sup> protects against the renal cell toxicity of Cd<sup>2+</sup>." @default.
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- W2068335282 date "2005-02-24" @default.
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- W2068335282 title "Zinc and Cadmium Interactions in a Renal Cell Line Derived from Rabbit Proximal Tubule" @default.
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- W2068335282 doi "https://doi.org/10.1159/000083413" @default.
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