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- W2051248703 abstract "An increased lipid peroxides and a decreased production of prostacyclin have been shown in advanced atherosclerotic lesions and plasma. Our purpose was to determine whether the similar findings could be observed in cultured endothelial cells, and whether antioxidants could protect the cell against peroxide injury. In these experiments we have used bovine aortic endothelial cells in culture to address the issue of hyperlipidemia-induced arterial damage. Results of the present study showed that different concentration of hyperlipidemic sera from atherogenic rabbits induced a time- and dose-dependent alteration in the production of prostacyclin and levels of lipid peroxides in endothelial cells. Endothelial cells incubated with hyperlipidemic serum increased prostacyclin generation significantly during the initial stages and then continuously decreased. When endothelial cells were incubated for 36 h, TXA2 generation was also impaired and at the same time the cellular lipid peroxides content increased. There was a positive correlation between the concentration of hyperlipidemic serum and lipid peroxides and an inverse correlation with prostacyclin synthesis. The medium supplemented with antioxidant selenium or vitamin E showed a significant decrease in lipid peroxides and an increase in prostacyclin synthesis. These results suggest that both hyperlipidemic serum and lipid peroxides injury endothelial cells and inactivate prostacyclin synthetase, resulting in a decrease of prostacyclin production, while antioxidants have a protective effect. We conclude that the increase in lipid peroxides in association with hyperlipidemia results in alteration of prostacyclin synthesis that may play an important role in the pathogenesis of atherosclerosis." @default.
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- W2051248703 date "1989-01-01" @default.
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- W2051248703 title "Effect of hyperlipidemic serum on lipid peroxidation, synthesis of prostacyclin and thromboxane by cultured endothelial cells: Protective effect of antioxidants" @default.
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- W2051248703 doi "https://doi.org/10.1016/0891-5849(89)90131-7" @default.
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