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Modeling the interaction of peroxynitrite with low-density lipoproteins. III: The role of antioxidants

机译:模拟过氧亚硝酸盐与低密度脂蛋白的相互作用。三:抗氧化剂的作用

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Peroxynitrite is a candidate for the substance responsible for the initiation of peroxidation of low-density lipoproteins (LDL) in blood. This is believed to be the initial step in the formation of atherosclerotic plaque. Using kinetic arguments, this paper examines possible routes in both LDL particles and in the surrounding plasma for antioxidants to block peroxidation. The antioxidants considered include ascorbate ion, glutathione and human serum albumin in plasma as well as a-tocopherol, ubiquinone-10 and carotenoids in the LDL particles. The results suggest that in the plasma compartment the most efficacious blocking mechanism is the reaction of ascorbate ion with the peroxynitrite precursor, superoxide ion. The situation in LDL particles is much less clear cut because of the paucity of kinetic data in this medium. However, some constraints are suggested on the requirements for an effective antioxidant. (C) 2000 Academic Press. [References: 56]
机译:过氧亚硝酸盐是负责引发血液中低密度脂蛋白(LDL)过氧化的物质的候选物。据信这是形成动脉粥样硬化斑块的第一步。本文使用动力学论证研究了低密度脂蛋白颗粒和周围血浆中可能存在的途径,以寻找抗氧化剂来阻止过氧化。考虑的抗氧化剂包括血浆中的抗坏血酸离子,谷胱甘肽和人血清白蛋白,以及低密度脂蛋白颗粒中的α-生育酚,泛醌-10和类胡萝卜素。结果表明,在等离子体室中,最有效的阻断机制是抗坏血酸离子与过氧亚硝酸盐前体超氧离子的反应。由于该介质中缺乏动力学数据,因此LDL粒子的情况不那么清晰。但是,对于有效抗氧化剂的要求提出了一些限制。 (C)2000学术出版社。 [参考:56]

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