Use of an oxidase electrode to determine factors affecting the in vitro production of hydrogen peroxide by Ehrlich cells and 1-chloro-2, 4-dinitrobenzene.

Use of an oxidase electrode to determine factors affecting the in vitro production of hydrogen peroxide by Ehrlich cells and 1-chloro-2, 4-dinitrobenzene.
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使用氧化酶电极确定影响艾利希细胞和 1-氯-2, 4-二硝基苯体外产生过氧化氢的因素。

DOI:
10.1016/0006-2952(81)90519-0
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发表时间:
1981
影响因子:
5.8
通讯作者:
Biaglow,JE
Biaglow,JE
中科院分区:
医学2区
文献类型:
--
作者:
Schroy,CB;Biaglow,JE

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用过氧化氢(H_2O_2)电极在体外连续监测H_2O_2浓度,以确定影响细胞H_2O_2产生和还原的一些因素。1-氯-2,4-二硝基苯(CDNB)是一种临床和分析试剂,被发现可改变埃利希腹水肿瘤细胞(EATC)的电子传递,导致H2 O2的形成。细胞悬浮液中H_2O_2的积累是在谷胱甘肽(GSH)耗竭所需的初始滞后期之后开始的,N-乙基马来酰亚胺(NEM)可去除巯基,缩短滞后期,但不改变H_2O_2积累的速率。H2 O2积累受葡萄糖和药物浓度的影响,葡萄糖在决定最终积累的H2 O2总量方面很重要。在不存在CDNB的情况下,外源添加的H2 O2的代谢还原被葡萄糖刺激,不受叠氮化物(过氧化氢酶抑制剂)的影响,并被NEM抑制。数据表明,谷胱甘肽过氧化物酶是主要负责灭活胞内产生的H2 O2,至少有三种机制可以操作,以消除谷胱甘肽在CDNB处理的细胞。研究结果表明,当CDNB用作全细胞分析试剂时,可能会发现人为的低水平GSH,并且局部使用CDNB可能会造成遗传健康危害。
A hydrogen peroxide (H2O2) electrode was used to continuously monitor H2O2concentrationsin vitroin a system designed to determine some of the factors which influence cellular H2O2production and reduction. 1-Chloro-2,4-dinitrobenzene (CDNB), a clinical and analytical agent, was found to alter electron transport in Ehrlich ascites tumor cells (EATC), causing formation of H2O2. H2O2accumulation in the cell suspension began after an initial lag period required for glutathione (GSH) depletion.N-Ethylmaleiraide (NEM), which removes thiols, shortened the lag period but did not alter the rate at which H2O2accumulated. H2O2accumulation was influenced by glucose and drug concentrations and glucose was important in determining the total amount of H2O2that eventually accumulated. The metabolic reduction of exogenously added H2O2in the absence of CDNB was stimulated by glucose, unaffected by azide (a catalase inhibitor), and inhibited by NEM. The data show that glutathione peroxidase is chiefly responsible for inactivating intracellularly produced H2O2and that at least three mechanisms may operate to remove glutathione in CDNB-treated cells. The findings imply that artificially low levels of GSH may be found when CDNB is used as an analytical reagent in whole cells and that topical use of CDNB may pose a genetic health hazard.
1-氯-2,4-二硝基苯会消耗大鼠皮肤中的谷胱甘肽,并对鼠伤寒沙门氏菌具有致突变性。
DOI: --
发表时间: 1980
期刊: Mutation research
影响因子: --
作者:
K. Summer;W. Göggelmann
通讯作者: W. Göggelmann
在硝基呋喃存在下,艾利希腹水肿瘤细胞中的电子转移。
DOI: --
发表时间: 1976
影响因子: 5.8
作者:
J. Biaglow;J. Biaglow;O. Nygaard;O. Nygaard;C. Greenstock
通讯作者: C. Greenstock
氧化剂“二酰胺”用于研究艾利希腹水肿瘤细胞的非线粒体还原能力的用途。
DOI: --
发表时间: 1973
期刊: Biochemical and Biophysical Research Communications - BBRC
影响因子: --
作者:
J. Biaglow;O. Nygaard
通讯作者: O. Nygaard
致癌物 4-硝基喹啉 1-氧化物与哺乳动物细胞的非蛋白质硫醇的相互作用。
DOI: --
发表时间: 1979
期刊: Cancer Research
影响因子: 11.2
作者:
M. Varnes;J. Biaglow
通讯作者: J. Biaglow
1-氟-2,4-二硝基苯的致突变性受细菌谷胱甘肽的影响。
DOI: --
发表时间: 1980
期刊: Mutation research
影响因子: --
作者:
K. Summer;W. Göggelmann
通讯作者: W. Göggelmann