Coronary Heart Disease
Inverse relation between the concentration of low-density-lipoprotein vitamin E and severity of coronary artery disease.
Regnstrom J; Nilsson J; Moldeus P; Strom K; Bavenholm P; Tornvall
P; Hamsten A
Oxidation of low-density lipoprotein (LDL) is believed to play an important role in atherogenesis, and antioxidant vitamins are thought to protect against coronary artery disease (CAD). We investigated whether the vitamin E concentrations in serum and LDL were associated with the severity of CAD as assessed by a semiquantitative scoring system in which coronary angiograms are analyzed for the number and size of distinct stenotic lesions (global stenosis score). The study group consisted of 64 consecutive male survivors of myocardial infarction aged < 45 y. Lipid-adjusted serum and LDL vitamin E concentrations were significantly lower in the patients than in 35 age-matched male control subjects, whereas the absolute serum and LDL vitamin E concentrations did not differ significantly. No associations were found between the serum concentration or lipid-adjusted serum values of vitamin E and the stenosis score. In contrast, significant inverse correlation was found between the LDL vitamin E concentration, whether adjusted to the lipid (r=-0.477,P<0.001) or protein (r=-0.375, P<0.01) content of LDL, and the global coronary stenosis score. We conclude that a low LDL vitamin E concentration might play a role in the development of stenoses in coronary arteries and may contribute to clinically manifest CAD.
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