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- W2087141372 abstract "Fatty liver in the goose results from an increased hepatic lipogenesis in response to overfeeding, together with a deficient secretion of triacylglycerol as very-low-density lipoproteins (VLDL). Orotic acid and estrogen, which both modify lipid metabolism in the liver, were used in male geese as tools to understand the alterations of liver lipids and plasma lipoproteins during the induction of liver steatosis. Liver lipids were analyzed after solvent extraction and plasma lipoproteins after separation by density gradient ultracentrifugation. Contrary to what is known in the rat, orotic acid (1% in food for 2 weeks) failed to induce liver steatosis. In force-fed geese, liver weight increased from ≈ 100 g to ≈ 800 g in 2 weeks, as a consequence of a specific accumulation of triacylglycerol. In both groups, VLDL contained less triacylglycerol (35%) than normal. Such an uncoupling of triacylglycerol synthesis and secretion, of which the precise reason is still unknown, may facilitate their accumulation when force-feeding increases hepatic lipogenesis. As with force-feeding, triacylglycerol synthesis was enhanced by estrogen, but their secretion as VLDL was very efficient and prevented liver steatosis almost completely. Since HDL concentrations were considerably decreased by estrogen, VLDL were the main lipoprotein species, with 48 g/l and 62% triacylglycerol. Where estrogen-treated geese were force-fed concomitantly, VLDL concentration was even higher (62 g/l), but triacylglycerol secretion could not prevent liver steatosis (liver weight 640 g). The data are discussed in relation to in vitro studies showing that channelling of triacylglycerol towards secretion as VLDL or hepatic storage depends on their residence time in the different intracellular compartments." @default.
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- W2087141372 date "1994-02-01" @default.
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- W2087141372 title "Influence of orotic acid and estrogen on hepatic lipid storage and secretion in the goose susceptible to liver steatosis" @default.
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- W2087141372 doi "https://doi.org/10.1016/0005-2760(94)90143-0" @default.
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