Antioxidant activity of ubiquinol in solution and phosphatidylcholine liposome.

Antioxidant activity of ubiquinol in solution and phosphatidylcholine liposome.
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泛醇溶液和磷脂酰胆碱脂质体的抗氧化活性。

DOI:
--
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发表时间:
1990
影响因子:
1.6
通讯作者:
E. Niki
E. Niki
中科院分区:
医学4区
文献类型:
--
作者:
Y. Yamamoto;E. Komuro;E. Niki

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测定了溶液中的亚油酸甲酯和水分散体系中的磷脂酰胆碱脂质体在自由基氧化反应中的抗氧化性。泛喹酚-10抑制了亚油酸甲酯在正己烷中的氧化,但其对过氧化自由基的反应活性比α-生育酚低约10倍。相反,泛醌-10没有表现出任何抗氧化活性。另一方面,泛喹酚-10与α-生育酚一样有效地抑制磷脂酰胆碱脂质体膜的氧化。当辅酶Q-10和α-生育酚同时存在时,辅酶Q-10首先降低,而α-生育酚在溶液和脂质体中均被消耗后降低。这些结果和电子自旋共振(ESR)研究表明,泛喹酚-10通过还原α-生育酚自由基来再生α-生育酚。
The antioxidant activities of ubiquinol and ubiquinone were measured in the free radical-mediated oxidations of methyl linoleate in solution and phosphatidylcholine liposomes in aqueous dispersion. Ubiquinol-10 suppressed the oxidation of methyl linoleate in hexane, although its reactivity toward peroxyl radical was about 10 times less than that of alpha-tocopherol. Ubiquinone-10, on the contrary, did not show any antioxidant activity. On the other hand, ubiquinol-10 inhibited the oxidation of phosphatidylcholine liposomal membranes as efficiently as alpha-tocopherol. When both ubiquinol-10 and alpha-tocopherol were present, ubiquinol-10 decreased first and alpha-tocopherol decreased after all ubiquinol-10 was consumed in both solution and liposomes. These results and electron spin resonance (ESR) study suggest that ubiquinol-10 regenerates alpha-tocopherol by reducing alpha-tocopheroxyl radical.
DOI: 10.1073/pnas.87.12.4879
发表时间: 1990-06-01
影响因子: 11.1
作者:
FREI, B;KIM, MC;AMES, BN
通讯作者: AMES, BN
DOI: 10.1073/pnas.85.9.3175
发表时间: 1988-05-01
影响因子: 11.1
作者:
KOHEN, R;YAMAMOTO, Y;AMES, BN
通讯作者: AMES, BN
DOI: 10.1016/0891-5849(90)90114-x
发表时间: 1990-01-01
影响因子: 7.4
作者:
KAGAN, VE;SERBINOVA, EA;PACKER, L
通讯作者: PACKER, L
DOI: 10.1016/0003-2697(88)90369-7
发表时间: 1988-11-15
影响因子: 2.9
作者:
FREI, B;YAMAMOTO, Y;AMES, BN
通讯作者: AMES, BN
线粒体电子传输相关的生育酚自由基还原。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Maguire,JJ;Wilson,DS;Packer,L
通讯作者: Packer,L