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Comparative Study
Journal Article
An X-ray, microanalytical and ultrastructural study of cadmium absorption and transport in rat liver.
Accumulation of cadmium in the liver was demonstrated by X-ray microanalysis in every type of experiment, i.e. after injecting Cd into the ligated intestine and after the peroral acute single and combined, subchronic and chronic administration of Cd. Half an hour after its injection, Cd was localized diffusely in the liver; one hour after injection its increased accumulation in the cells caused generalized changes in the endoplasmic reticulum, mitochondria and nuclei. In acute and chronic peroral tests, the hepatocytes of the intermedial and peripheral zone of the lobes were the main storage region. After an acute dose of Cd, the cells in the centrolobular zone were hydropic, or single-cell necrosis developed; after the longer effect of combined doses the latter was manifested as centrolobular focal necrosis. Cd was not demonstrated in the lesions. Chronic administration did not lead to manifest severe degenerative changes in the liver. Accretions in the mitochondria and on the membranes of the endoplasmic reticulum were identified by means of X-ray analysis with cadmium peaks. Cadmium showed up clearly as L alpha- and L beta-lines at 3.135-3.320 keV. We presume that cadmium is bound in the ribosomes of the endoplasmic reticulum, as well as the mitochondria, and is released by the invagination of swelling mitochondria of the peripheral hepatocytes into Disse's spaces.
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