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• W2026345801 endingPage "194" @default.
• W2026345801 startingPage "188" @default.
• W2026345801 abstract "Several studies have shown the beneficial effects of folate treatment in improving cardiovascular function. However, the mechanisms involved have not been clearly identified. The aim of this study is to determine the effect of folates and vitamin B12 on endothelial vasoconstriction/vasodilatation parameters in cultured human endothelial cells incubated with human low density lipoproteins (LDL).Human umbilical vein endothelial cells (HUVEC) were extracted from recently delivered umbilical cords, cultured until confluence was achieved, and then incubated for 24h with folic acid (FA), 5-methyltetrahydrofolic acid (5-MTHF) or vitamin B12 (B12) in the presence or absence of LDL that was isolated from healthy volunteers. Total nitrites (as a measure of nitric oxide production), thiobarbituric acid reactive species (TBARS, a parameter of lipid peroxidation), and endothelin-1 (ET-1) were determined in the incubation media. None of the vitamins, either in the presence or absence of LDL, was able to modify nitric oxide production by HUVEC. A significant reduction of ET-1 production was observed in LDL-treated cells. This effect was not modified by FA or B12; however, 5-MTHF caused a concentration-dependent increase on ET-1 production, an effect coincidental with reduced TBARS production.This study demonstrates for the first time that 5-MTHF, but not FA or B12, increases ET-1 production in LDL-treated endothelial cells. Although this effect was associated with the antioxidant properties of this folate, our results show that additional specific mechanisms involving 5-MTHF-LDL interactions may be operating to regulate endothelial function." @default.
• W2026345801 created "2016-06-24" @default.
• W2026345801 creator A5010684743 @default.
• W2026345801 creator A5045773323 @default.
• W2026345801 creator A5058111785 @default.
• W2026345801 creator A5086568535 @default.
• W2026345801 date "2007-03-01" @default.
• W2026345801 modified "2023-10-18" @default.
• W2026345801 title "5-Methyltetrahydrofolic acid stimulates endothelin-1 production in low density lipoprotein-treated human endothelial cells" @default.
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• W2026345801 doi "https://doi.org/10.1016/j.numecd.2005.12.005" @default.
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• W2026345801 hasPublicationYear "2007" @default.
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