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- W2133932465 abstract "Background. Hyperhomocysteinaemia is an independent risk factor for the development of atherosclerosis. Furthermore, homocysteine induces endothelial dysfunction by an increased inactivation of nitric oxide. In patients with chronic renal failure, the administration of folic acid or its metabolites reduces but does not normalize plasma homocysteine concentrations. Methods. We examined the effect of oral treatment with 15 mg/daily of 5-methyltetrahydrofolate (5-MTHF) for 12 weeks, on homocysteinaemia and endothelial function in 19 patients undergoing peritoneal dialysis and compared them, for the same period of time, to a control group of patients on peritoneal dialysis. Endothelial function was evaluated by B-mode ultrasonography on the brachial artery. Flow-mediated dilation (FMD) was recorded during reactive hyperaemia produced by the inflation of a pneumatic tourniquet. Nitroglycerine-mediated dilation (NMD) was recorded after sublingual administration of glyceryl trinitrate. Finally, oxidative stress was assessed by evaluating the conjugated dienes plasma levels. Results. Plasma homocysteine concentrations fell by 30% after oral treatment with 5-MTHF. Endothelial function improved significantly after oral 5-MTHF treatment (13.8 ± 1.2% vs 11.4 ± 1.4%; P < 0.02) while in the control group we observed a worsening of basal values from 12.1 ± 2.66% to 8.7 ± 2.90% ( P < 0.02). The conjugated dienes plasma levels did not change either. Conclusions. Our study demonstrated that 5-MTHF administration improves endothelial dysfunction in patients undergoing peritoneal dialysis. This effect appears to be independent of the reduction in homocysteine plasma levels." @default.
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- W2133932465 date "2007-06-05" @default.
- W2133932465 modified "2023-10-16" @default.
- W2133932465 title "Improvement of endothelial function in uraemic patients on peritoneal dialysis: a possible role for 5-MTHF administration" @default.
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- W2133932465 doi "https://doi.org/10.1093/ndt/gfm402" @default.
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