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- W2133642619 abstract "Alterations in the liver of rats subjected to 24 days of continuous administration of phenobarbitone have been supplied bu subcellular fractionation, conventional electron microscopy and morphometric analysis. The increase in wet weight of the liver was found to result from a combination of cellular hypertrophy, hyperplasia and an enlarged hepatic blood space. In the centrilobular zone all the hepatocytes underwent a substantial proliferation of total ER, became enlarged and had an increased blood supply. However, in the periportal zone phenobarbitone caused changes in only 45% of the hepatocytes, the remainder being apparently resistent or tardy. An overall dramatic increase in hepatic RER was both measured and observed but the response involved hepatocytes in which the RER had proliferated as well as those which were depleted of RER or had stacks and cisternae that were severely shortened and dispersed. These alterations are discussed in relation to changes in RER after administration of agents causing hepatonecrosis. Possible reasons for the inability of other workers to detect a phenobarbitone-induced increase in RER are also put forward. After subcellular fractionation and corection for centrifugation losses into the 9500 g pellet, using the microsomal marker cytochrome P-450, phenobarbitone-induced increase in total ER was substantially less than that found by morphometric analysis. This indicates that during the preparation of microsomes a substantial proportion of intracellular membranes, having different metabolic and synthetic properties to those finally isolated, are discarded and emphasizes the need to exercise care when using microsomal preparations." @default.
- W2133642619 created "2016-06-24" @default.
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- W2133642619 date "1979-03-01" @default.
- W2133642619 modified "2023-10-12" @default.
- W2133642619 title "Zonal changes in the rat liver after chronic administration of phenobarbitone: An ultrastructural, morphometric and biochemical correlation" @default.
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- W2133642619 doi "https://doi.org/10.1016/0009-2797(79)90081-4" @default.
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