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Nephrotoxicity of simultaneous exposure to mercury and uranium in comparison to individual effects of these metals in rats

Biological Trace Element Research volume 84, Article number: 139 (2001) Cite this article

Abstract

Both inorganic mercury and uranium are known nephrotoxicants in mammals. In this study, the renal toxicity of a concurrent exposure to inorganic mercury and uranium was compared with the nephrotoxic effects of the individual metals in a rat model. Eight groups of rats, 10 animals per group, were subcutaneously given a single administration of mercuric chloride (HgCl2, 0.34 mg/kg and 0.68 mg/kg), uranyl acetate dihydrate (UAD, 2.5 mg/kg and 5 mg/kg), or combinations of both compounds at the same doses. A ninth group of rats received sc injections of 0.9% saline and was designated as the control group. Necrosis of proximal tubules, which was observed in all experimental groups, was the most relevant morphologic abnormality. Marked changes, which were remarkably greater than those induced by the individual elements, were noted in some urinary parameters in the groups concurrently exposed to HgCl2 and UAD. It could be an indicator of a synergistic interaction between mercury and uranium. In contrast, compared with the urinary levels found after individual administration of the highest doses of mercury and uranium, significant reductions in the urinary concentrations of these elements were noted following simultaneous exposure to both metals. At these doses, the reduction in the urinary metal excretion was also accompanied by significant decreases in the renal content of mercury and uranium. Whereas the results of some parameters pointed out a possible synergistic interaction between mercury and uranium, other measures hinted that an antagonistic interaction between these elements is also present.

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Affiliations

  1. Laboratory of Toxicology and Environmental Health, School of Medicine, “Rovira i Virgili” University, 43201, Reus, Spain

    Domenec J. Sánchez, Montserrat Bellés, M. Luisa Albina, Juan J. Sirvent & José L. Domingo

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  1. Domenec J. Sánchez
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  2. Montserrat Bellés
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  3. M. Luisa Albina
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  4. Juan J. Sirvent
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  5. José L. Domingo
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Sánchez, D.J., Bellés, M., Albina, M.L. et al. Nephrotoxicity of simultaneous exposure to mercury and uranium in comparison to individual effects of these metals in rats. Biol Trace Elem Res 84, 139 (2001). https://doi.org/10.1385/BTER:84:1-3:139

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  • DOI: https://doi.org/10.1385/BTER:84:1-3:139

Index Entries

  • Mercuric chloride
  • uranyl acetate dihydrate
  • simultaneous exposure
  • interactions
  • rats
  • nephrotoxicity