Abstract
At the levels used in the experiments, mercury and silver significantly depressed the activity of glutathione peroxidase (assayed with either H2O2 or cumene-OOH) in rat tissues, whereas cadmium or lead had no effect on this activity. The most pronounced effects of mercury and silver on glutathione peroxidase were found in the liver and kidneys, with much less effect in the testes and erythrocytes. Similar trends for the effects of these metals were noted for tissue selenium levels. Silver and mercury significantly depressed the selenium concentrations, but cadmium and lead had no effect upon the selenium levels. Mercury and silver had no effect upon the activity of glutathione transferase in liver and testes, but mercury caused a significant initial increase of its activity in the kidneys. At no time did silver have any significant effect on its activity in this organ.
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