Therapeutic potential of vitamin E in heart disease

Therapeutic potential of vitamin E in heart disease
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维生素E对心脏病的治疗潜力

DOI:
--
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发表时间:
2000
影响因子:
6.1
通讯作者:
D. Bunout
D. Bunout
中科院分区:
医学2区
文献类型:
--
作者:
D. Bunout

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低密度脂蛋白(LDL)氧化被认为是动脉粥样硬化形成过程中的重要步骤。氧化修饰的颗粒诱导黏附分子的表达,刺激炎性细胞因子的产生,损害内皮功能。体内氧化低密度脂蛋白的测量非常困难,因此大多数研究人员依赖于这些颗粒的体外氧化能力的测量来评估它们的有害影响。补充水和脂溶的抗氧化维生素,特别是维生素C和E,显著提高对低密度脂蛋白氧化的抵抗力。补充维生素E还可以改善高胆固醇血症和吸烟受试者的内皮依赖性血管扩张。流行病学研究并没有始终如一地证明食用维生素E作为食物或补充剂对冠状动脉事件或中风具有保护作用。同样,在五项大型前瞻性试验中,只有一项显示补充维生素E对心血管事件或死亡率有好处。一份报告显示,补充血液透析的患者心血管事件发生率较低。因此,目前没有足够的证据来广泛推荐使用维生素E补充剂来保护血管。
Low density lipoprotein (LDL) oxidation is considered an important step in the atherogenic process. Oxidatively modified particles induce the expression of adhesion molecules, stimulate the production of inflammatory cytokines and impair endothelial function. The measurement of oxidised LDLs in vivo is very difficult, therefore most investigators rely on the measurement of in vitro oxidability of these particles to evaluate their deleterious effects. Supplementation with water and lipid soluble anti-oxidant vitamins, especially vitamin C and E, significantly increase the resistance to LDL oxidation. Vitamin E supplementation also improves endothelium-dependent vasodilation in hypercholesterolaemic and subjects who smoke cigarettes. Epidemiological studies have not consistently demonstrated a protective effect of vitamin E consumption as food or supplements on coronary events or stroke. Likewise, only one of five large prospective trials has shown a beneficial effect of vitamin E supplementation on cardiovascular events or mortality. One report showed that supplemented haemodialysed patients had a lower incidence of cardiovascular events. Thus, presently, there is not enough evidence to widely recommend the use of vitamin E supplements for vascular protection.
绝经后女性抗氧化维生素的摄入量和中风死亡风险。
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