Inhibition of the microsomal oxidation of ethanol and 1-butanol by the free-radical, spin-trapping agent 5,5-dimethyl-1-pyrroline-1-oxide.
Inhibition of the microsomal oxidation of ethanol and 1-butanol by the free-radical, spin-trapping agent 5,5-dimethyl-1-pyrroline-1-oxide.
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自由基自旋捕获剂 5,5-二甲基-1-吡咯啉-1-氧化物抑制乙醇和 1-丁醇的微粒体氧化。
DOI:
10.1016/0003-9861(80)90049-1
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发表时间:
1980
影响因子:
3.9
通讯作者:
Cohen,G
中科院分区:
文献类型:
--
作者:
Cederabum,AI;Cohen,G
The free-radical, spin-trapping agent, 5,5-dimethyl-1-pyrroline-1-oxide (DMPO), inhibited the microsomal oxidation of ethanol and 1-butanol as well as the metabolism of 2-keto-4-thiomethylbutyrate. DMPO also blocked the stimulation of ethanol oxidation caused by the addition of iron-EDTA to microsomes. Previous electron spin resonance studies with DMPO by others had shown that the free radical produced by rat liver microsomes and augmented by iron-EDTA was the hydroxyl radical. In the current study, DMPO had no effect on microsomal oxygen consumption with NADPH as substrate, nor on NADPH-cytochromecreductase activity, nor on the demethylation of aminopyrine or the hydroxylation of aniline. Therefore, a general toxic action of DMPO on microsomes is excluded. DMPO also failed to inhibit the catalase-dependent pathway of ethanol oxidation by microsomes. Experiments with Chelex 100 resin and the chelating agent, diethylenetri-aminepentaacetic acid, rule out any major role for contaminating iron in the reagents. These results tend to identify the free radical responsible for microsomal metabolism of ethanol, 1-butanol, and 2-keto-4-thiomethylbutyrate as the radical trapped by DMPO, namely the hydroxyl radical.
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DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
Oliver C. Lloyd
通讯作者:
Oliver C. Lloyd
DOI:
--
发表时间:
1981
期刊:
Cancer treatment reports
影响因子:
--
作者:
Wick,MM
通讯作者:
Wick,MM
DOI:
10.1111/j.1432-0436.1985.tb00510.x
发表时间:
1985
期刊:
Differentiation; research in biological diversity
影响因子:
--
作者:
Lipkin,G;Naughton,GK;Rosenberg,M;Bystryn,JC
通讯作者:
Bystryn,JC
DOI:
--
发表时间:
1968
期刊:
Scandinavian journal of clinical and laboratory investigation. Supplementum
影响因子:
--
作者:
H. Wetterqvist
通讯作者:
H. Wetterqvist
DOI:
--
发表时间:
1985
期刊:
Dermatologia clinica
影响因子:
--
作者:
J. Bystryn
通讯作者:
J. Bystryn