Lipid peroxidation and hemoglobin degradation in red blood cells exposed to t-butyl hydroperoxide. Dependence on glucose metabolism and hemoglobin status.

Lipid peroxidation and hemoglobin degradation in red blood cells exposed to t-butyl hydroperoxide. Dependence on glucose metabolism and hemoglobin status.
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暴露于叔丁基过氧化氢的红细胞中的脂质过氧化和血红蛋白降解。

DOI:
10.1016/0304-4165(81)90211-7
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发表时间:
1981
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Stern,A
Stern,A
中科院分区:
--
文献类型:
--
作者:
Trotta,RJ;Sullivan,SG;Stern,A

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血红蛋白状态和脂质过氧化的变化,随后在红细胞含有氧合-甲氧血红蛋白,或碳单氧血红蛋白,孵育与丁基氢过氧化物在培养基中有或没有葡萄糖。完整血红蛋白(氧合血红蛋白和高铁血红蛋白的总和)的损失与含有氧合血红蛋白或高铁血红蛋白的红细胞中的脂质过氧化程度成反比。当葡萄糖被添加到介质中,脂质过氧化反应增加,而有一个完整的血红蛋白在红细胞中含有氧合或高铁血红蛋白的损失减少,而脂质过氧化和血红蛋白的变化减少在红细胞中含有碳一氧合血红蛋白。高铁血红蛋白的形成和完整血红蛋白的损失与含碳一氧血红蛋白的红细胞中脂质过氧化的程度成正比。最大量的脂质过氧化反应发生在含有碳一氧血红蛋白的红细胞中,在没有葡萄糖的情况下孵育。这些结果表明,高铁血红蛋白和不完整的血红蛋白可以保护膜免受脂质过氧化。我们建议,根据葡萄糖的可用性和血红蛋白的配体状态,脂质过氧化和血红蛋白的变化代表了氧化损伤谱的极端。
Changes in hemoglobin status and lipid peroxidation were followed in red cells containing either oxy- met-, or carbonmonoxyhemoglobin, incubated witht-butyl hydroperoxide in a medium with or without glucose. Loss of intact hemoglobin (the sum of oxyhemoglobin and methemoglobin) was inversely proportional to the degree of lipid peroxidation in red cells containing either oxy- or methemoglobin. When glucose was added to the medium, lipid peroxidation increased while there was a decreased loss of intact hemoglobin in red cells containing either oxy- or methemoglobin, while both lipid peroxidation and changes in hemoglobin decreased in red cells containing carbonmonoxyhemoglobin. Methemoglobin formation and loss of intact hemoglobin were directly proportional to the degree of lipid peroxidation in red cells containing carbonmonoxyhemoglobin. The greatest amount of lipid peroxidation occurred in red cells containing carbonmonoxyhemoglobin, incubated without glucose. These results indicate that methemoglobin and non-intact hemoglobin may protect the membrane against lipid peroxidation. We propose that, depending on the availability of glucose and the liganded state of hemoglobin, lipid peroxidation and hemoglobin alterations represent extremes of a spectrum of oxidative damage.
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