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• W4299682351 abstract "In an attempt to clarify the role of oval cells in the emergence of hepatocellular carcinoma, we fed rats a choline-free diet containing 0%, 0.05% or 0.1% ethionine. The incidence and nature of premalignant and malignant hepatic lesions were then related to the degree of oval cell proliferation. Intake of choline-free diet alone for up to 12 mo was associated with minimal oval cell proliferation; cholangiofibrosis, hepatocellular nodules and hepatocellular carcinoma were observed in 55%, 23% and 14% of the animals, respectively. When rats were given the choline-free diet with 0.05% ethionine, proliferation of oval cells was more pronounced; after a 6- to 12 mo feeding period, cholangiofibrosis (57%) was again observed. However, hepatocellular nodules (91%) and hepatocellular carcinoma (74%) were the most common lesions seen with this feeding regimen. Finally, rats fed the choline-free diet with 0.1% ethionine had massive oval cell proliferation and progressive loss of parenchymal liver tissue. Most of these animals died before they had consumed the choline-free diet with 0.1% ethionine for 12 mo. Rats in this group (96%) exhibited large and numerous cholangiofibrotic lesions, but hepatocellular nodules and carcinoma were not detected. In all animals of each experimental group, hyperplastic bile duct cells in areas of cholangiofibrosis and oval cells were positive for cytokeratin 19, an intermediate filament protein present only in bile duct cells in normal liver. Hepatocellular nodules and hepatocellular carcinoma were invariably negative for cytokeratin 19. We interpret these findings to suggest that oval cells are not involved in the histogenesis of hepatocellular carcinoma. They are, rather, consistent with the view that hepatocellular carcinoma is hepatocellular in lineage in hepatocarcinogenesis during intake of a choline-free diet (whether or not it is supplemented with ethionine) and, possibly, in other forms of neoplastic liver growth associated with oval cell proliferation. (HEPATOLOGY 1993;18:596–603.)" @default.
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• W4299682351 date "1993-09-01" @default.
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• W4299682351 title "Liver carcinogenesis associated with feeding of ethionine in a choline-free diet: Evidence against a role of oval cells in the emergence of hepatocellular carcinoma" @default.
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• W4299682351 doi "https://doi.org/10.1002/hep.1840180319" @default.
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