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  • Title: Protective role of metallothionein in renal toxicity of cisplatinum.
    Author: Satoh M, Aoki Y, Tohyama C.
    Journal: Cancer Chemother Pharmacol; 1997; 40(4):358-62. PubMed ID: 9225956.
    Abstract:
    To elucidate the protective role of metallothionein (MT) in the prevention of cisplatinum (cis-DDP) toxicity, we investigated the lethal and renal toxicities caused by cis-DDP in MT-null transgenic mice in comparison with wild-type control mice, and examined the effect of pretreatment with bismuth nitrate or zinc sulfate on the cis-DDP nephrotoxicity. The MT-null mice were of mixed 129 Ola and C57BL/6 genetic background. Since no differences in cis-DDP nephrotoxicity were observed between these strains, C57BL/6J mice were used as the wild-type control. The basal MT levels in the kidneys were negligible in the MT-null mice and 2.93 +/- 0.77 micrograms/g tissue in the C57BL/6J mice. In terms of both the lethal and renal toxicities of cis-DDP, MT-null mice were far more sensitive than C57BL/6J mice. Preinduction of renal MT synthesis by administration of bismuth nitrate or zinc sulfate protected C57BL/6J mice from cis-DDP nephrotoxicity. In the case of MT-null mice, however, renal MT could not be induced by pretreatment with these metal compounds, and renal toxicity of cis-DDP was not prevented by this pretreatment. These results suggest that MT is an important factor with the potential to suppress the development of cis-DDP toxicity.
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