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  • 1
    ISSN: 1432-0738
    Schlagwort(e): Interaction ; Zinc ; Mercury ; Selenium ; Inorganic ; Subcellular distribution ; Liver ; Kidney ; Metallothionein ; Endogenous copper
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Interaction of zinc with mercuric chloride and sodium selenite was studied in the rat at the organ and subcellular levels (liver and kidneys). Zinc chloride was administered subcutaneously at dose of 5 mg Zn/kg, mercury chloride into the tail vein at a dose of 0.5 mg Hg/kg (both metals every other day during 2 weeks) and sodium selenite intragastrically, at doses of 0.1 mg Se/kg, every day. Zinc retention in the rat did not exceed 20% and was unchanged in the presence of mercury. An interaction effect was reflected by an increased whole-body retention of zinc by selenium, mercury, and selenium. In the presence of selenium no peak of metallothionein-like proteins stimulated by zinc or mercury was found in the soluble fraction of the kidneys. The metallothionein level did not differ from that typical for control group animals, too. A significant increase in the level of endogenous copper was found only in the kidneys of rats exposed to zinc in the presence of mercury and selenium.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-0738
    Schlagwort(e): Mercury ; Selenium ; Retention ; Liver ; Kidney ; Ultrastructure ; Interaction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Distribution and retention of mercury and selenium was studied in rats exposed repeatedly to HgCl2 injections (0.5 mg Hg/kg to the tail vein every other day) and intragastrically to Na2SeO3 (0.5 mg Se/kg every day), applying combined and separate administration of these metals for 2 weeks. Whole-body retention of mercury in the presence of selenium was augmented by 20% and that of selenium in the presence of mercury by 4% with respect to the administered dose. Combined administration of mercuric chloride and sodium selenite brought about damage to the epithelial cells of renal proximal convolutions and formation of protein casts in their lumen. These changes had the same pattern as those induced by administration of mercuric chloride alone, but the intensity was lower. Submicroscopic studies revealed that repeated combined administration of sodium selenite and mercuric chloride did not completely abolish the mercury-induced mitochondrial swelling and contributed to chromatin destruction in the hepatocyte nuclei.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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