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  • Title: A significant correlation between the plasma levels of coenzyme Q10 and vitamin B-6 and a reduced risk of coronary artery disease.
    Author: Lee BJ, Yen CH, Hsu HC, Lin JY, Hsia S, Lin PT.
    Journal: Nutr Res; 2012 Oct; 32(10):751-6. PubMed ID: 23146771.
    Abstract:
    Coronary artery disease (CAD) is the leading cause of death worldwide. The purpose of this study was to investigate the relationship between plasma levels of coenzyme Q10 and vitamin B-6 and the risk of CAD. Patients with at least 50% stenosis of one major coronary artery identified by cardiac catheterization were assigned to the case group (n = 45). The control group (n = 89) comprised healthy individuals with normal blood biochemistry. The plasma concentrations of coenzyme Q10 and vitamin B-6 (pyridoxal 5'-phosphate) and the lipid profiles of the participants were measured. Subjects with CAD had significantly lower plasma levels of coenzyme Q10 and vitamin B-6 compared to the control group. The plasma coenzyme Q10 concentration (β = 1.06, P = .02) and the ratio of coenzyme Q10 to total cholesterol (β = .28, P = .01) were positively correlated with vitamin B-6 status. Subjects with higher coenzyme Q10 concentration (≥516.0 nmol/L) had a significantly lower risk of CAD, even after adjusting for the risk factors for CAD. Subjects with higher pyridoxal 5'-phosphate concentration (≥59.7 nmol/L) also had a significantly lower risk of CAD, but the relationship lost its statistical significance after adjusting for the risk factors of CAD. There was a significant correlation between the plasma levels of coenzyme Q10 and vitamin B-6 and a reduced risk of CAD. Further study is needed to examine the benefits of administering coenzyme Q10 in combination with vitamin B-6 to CAD patients, especially those with low coenzyme Q10 level.
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