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https://hdl.handle.net/2440/47503
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Type: | Journal article |
Title: | Homocysteine-lowering treatment with folic acid, cobalamin, and pyridoxine does not reduce blood markers of inflammation, endothelial dysfunction, or hypercoagulability in patients with previous transient ischemic attack or stroke: A randomized substudy of the VITATOPS trial |
Author: | Dusitanond, P. Eikelboom, J. Hankey, G. Thom, J. Gilmore, G. Loh, K. Yi, Q. Klijn, C. Langton, P. van Bockxmeer, F. Baker, R. Jamrozik, K. |
Citation: | Stroke, 2005; 36(1):144-146 |
Publisher: | Lippincott Williams & Wilkins |
Issue Date: | 2005 |
ISSN: | 0039-2499 1524-4628 |
Statement of Responsibility: | P. Dusitanond, J.W. Eikelboom, G.J. Hankey, J. Thom, G. Gilmore, K. Loh, Q. Yi, C.J.M. Klijn, P. Langton, F.M. van Bockxmeer, R. Baker and K. Jamrozik |
Abstract: | Background and Purpose— Epidemiological and laboratory studies suggest that increasing concentrations of plasma homocysteine (total homocysteine [tHcy]) accelerate cardiovascular disease by promoting vascular inflammation, endothelial dysfunction, and hypercoagulability. Methods— We conducted a randomized controlled trial in 285 patients with recent transient ischemic attack or stroke to examine the effect of lowering tHcy with folic acid 2 mg, vitamin B12 0.5 mg, and vitamin B6 25 mg compared with placebo on laboratory markers of vascular inflammation, endothelial dysfunction, and hypercoagulability. Results— At 6 months after randomization, there was no significant difference in blood concentrations of markers of vascular inflammation (high-sensitivity C-reactive protein [P=0.32]; soluble CD40L [P=0.33]; IL-6 [P=0.77]), endothelial dysfunction (vascular cell adhesion molecule-1 [P=0.27]; intercellular adhesion molecule-1 [P=0.08]; von Willebrand factor [P=0.92]), and hypercoagulability (P-selectin [P=0.33]; prothrombin fragment 1 and 2 [P=0.81]; D-dimer [P=0.88]) among patients assigned vitamin therapy compared with placebo despite a 3.7-µmol/L (95% CI, 2.7 to 4.7) reduction in total homocysteine (tHcy). Conclusions— Lowering tHcy by 3.7 µmol/L with folic acid-based multivitamin therapy does not significantly reduce blood concentrations of the biomarkers of inflammation, endothelial dysfunction, or hypercoagulability measured in our study. The possible explanations for our findings are: (1) these biomarkers are not sensitive to the effects of lowering tHcy (eg, multiple risk factor interventions may be required); (2) elevated tHcy causes cardiovascular disease by mechanisms other than the biomarkers measured; or (3) elevated tHcy is a noncausal marker of increased vascular risk. |
Description: | Published online before print November 29, 2004 |
Rights: | © 2005 American Heart Association, Inc. |
DOI: | 10.1161/01.STR.0000150494.91762.70 |
Published version: | http://stroke.ahajournals.org/cgi/content/full/strokeaha;36/1/144 |
Appears in Collections: | Aurora harvest 6 Public Health publications |
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