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Durga, J. et al.

Durga, van Tits, Schouten, Kok, Verhoef,

Effect of lowering of homocysteine levels on inflammatory markers: a randomized controlled trial.

BACKGROUND: Elevated concentrations of homocysteine and low concentrations of folate may lead to a proinflammatory state that could explain their relation to vascular disease risk. We investigated the effect of lowering homocysteine concentrations by means of folic acid supplementation on markers of inflammation. METHODS: In a double-blind, randomized, placebo-controlled trial among 530 men and postmenopausal women with homocysteine concentrations of 1.8 mg/L or higher (>/=13 micromol/L) at screening, we investigated the effect of folic acid supplementation (0.8 mg/d) vs placebo for 1 year on serum concentrations of C-reactive protein, soluble intercellular adhesion molecule-1, oxidized low-density lipoprotein, and autoantibodies against oxidized low-density lipoprotein. RESULTS: After 1 year of supplementation, concentrations of serum folate increased by 400% (95% confidence interval [CI], 362%-436%), and those of homocysteine decreased by 28% (95% CI, 24%-36%) in the folic acid group compared with the placebo group. However, no changes in plasma concentrations of the inflammatory markers were observed. CONCLUSIONS: Although homocysteine is associated with vascular disease risk in the general population, marked lowering of slightly elevated homocysteine concentrations by means of 1-year folic acid supplementation does not influence inflammatory responses involving C-reactive protein, soluble intercellular adhesion molecule-1, oxidized low-density lipoprotein, and autoantibodies against oxidized low-density lipoprotein.[1]

References

Effect of lowering of homocysteine levels on inflammatory markers: a randomized controlled trial. Durga, J., van Tits, L.J., Schouten, E.G., Kok, F.J., Verhoef, P. Arch. Intern. Med. (2005) [Pubmed]

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