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- W2155164561 abstract "To clarify the role of Fc receptors (FcR) for immunoglobulin in endothelial dysfunction induced by hypercholesterolaemia, we evaluated the effect of deletion of the FcR gamma chain on endothelium-dependent relaxation and oxidative stress after 10 weeks on a high-fat diet in FcR gamma(-/-) mice compared with that in wild-type mice.Plasma cholesterol levels of those on the high-fat diet were significantly increased compared with those on the normal chow diet in both groups of mice. Endothelium-dependent relaxation of the aortic ring with acetylcholine in wild-type mice was significantly reduced by the high-fat diet (ED(50): 0.22 vs. 0.43 nM, P < 0.002), whereas the relaxation in FcR gamma(-/-) mice was not inhibited (ED(50): 0.22 vs. 0.23 nM, NS). Furthermore, superoxide detection by dihydroethidium-derived fluorescence and immunohistochemical staining of p22phox expression were significantly increased in wild-type mice fed on the high-fat diet, while these oxidative stresses in FcR gamma(-/-) mice were not enhanced by the high-fat diet. Oil Red O-staining showed no significant lipid accumulation at the aortic sinus in both groups of mice.This study demonstrates that the deletion of the FcR gamma chain preserves the endothelial function and attenuates oxidative stress affected by hypercholesterolaemia in FcR gamma(-/-) mice. These results indicate that FcR may play the pivotal role in endothelial dysfunction through oxidative stress induced by hypercholesterolaemia." @default.
- W2155164561 created "2016-06-24" @default.
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- W2155164561 date "2008-10-01" @default.
- W2155164561 modified "2023-09-25" @default.
- W2155164561 title "Deletion of the Fc receptors chain preserves endothelial function affected by hypercholesterolaemia in mice fed on a high-fat diet" @default.
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- W2155164561 doi "https://doi.org/10.1093/cvr/cvn206" @default.
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