Isopropanol enhancement of cytochrome P-450-dependent monooxygenase activities and its effects on carbon tetrachloride intoxication.

Isopropanol enhancement of cytochrome P-450-dependent monooxygenase activities and its effects on carbon tetrachloride intoxication.
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异丙醇增强细胞色素 P-450 依赖性单加氧酶活性及其对四氯化碳中毒的影响。

DOI:
10.1016/0041-008x(83)90337-x
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发表时间:
1983
影响因子:
3.8
通讯作者:
A. Alvares
A. Alvares
中科院分区:
医学3区
文献类型:
--
作者:
T. Ueng;L. Moore;R. Elves;A. Alvares

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用异丙醇对大鼠进行急性或慢性治疗,导致肝细胞色素P-450含量显着增加,苯胺羟化酶和7-乙氧基香豆素O-脱乙基酶活性增加2至3倍,但乙基吗啡N-脱甲基酶或苯并(a)芘羟化酶活性没有显着变化。在用异丙醇处理并用 CCl4 激发的大鼠中,根据血清谷氨酸丙酮酸转氨酶 (SGPT) 水平升高的评估,CCl4 的肝毒性特征性增强。异丙醇预处理还增强了 CCl4 诱导的肝单加氧酶系统损伤。除了细胞色素 P-450 降低外,用异丙醇处理并用 CCl4 攻击的大鼠不仅苯胺羟化酶和 7-乙氧基香豆素 O-脱乙基酶活性出现非特异性降低,而且乙基吗啡 N-脱甲基酶、苯并 (a) 芘羟化酶和 NADPH-细胞色素 c 还原酶活性也出现非特异性降低。这些结果通过溶解的微粒体的十二烷基硫酸钠-聚丙烯酰胺凝胶电泳得到证实。电泳结果表明,异丙醇预处理显着增强了 CCl4 引起的细胞色素 P-450 血红素蛋白的破坏。数据强烈表明,异丙醇会增加一种或多种形式的细胞色素 P-450,从而选择性地增强 CCl4 代谢为活性代谢物。这种活性代谢物随后会对微粒体混合功能氧化酶系统造成非选择性损伤。
Acute or chronic treatment of rats with isopropanol caused a significant increase in hepatic cytochrome P-450 content and a two- to threefold increase in aniline hydroxylase and 7-ethoxycoumarin O-deethylase activities, but no significant change in ethylmorphine N-demethylase or benzo(a)pyrene hydroxylase activity. In rats treated with isopropanol and challenged with CCl4, liver toxicity of CCl4was characteristically potentiated, as assessed by elevation of serum glutamic-pyruvic transaminase (SGPT) levels. Isopropanol pretreatment also potentiated CCl4-induced damage to the hepatic monooxygenase system. In addition to a decrease in cytochrome P-450, rats treated with isopropanol and challenged with CCl4showed a nonspecific decrease not only in aniline hydroxylase and 7-ethoxycoumarin O-deethylase activities, but also in ethylmorphine N-demethylase, benzo(a)pyrene hydroxylase, and NADPH-cytochrome c reductase activities. These results were confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis of solubilized microsomes. The electrophoretic results showed that isopropanol pretreatment markedly potentiated the CCl4-caused destruction of cytochrome P-450 hemeproteins. The data strongly suggest that isopropanol increases one or more forms of cytochrome P-450 which selectively enhance the metabolism of CCl4to an active metabolite. This active metabolite then causes a nonselective damage to the microsomal mixedfunction oxidase system.
DOI: 10.3109/15563658208990399
发表时间: 1982
期刊: Journal of toxicology. Clinical toxicology
影响因子: --
作者:
Anders,MW
通讯作者: Anders,MW
从乙醇处理的兔子的肝微粒体中分离出的细胞色素 P-450 同工酶 3a 的催化活性。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
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通讯作者: Coon,MJ
DOI: 10.1016/0024-3205(82)90767-6
发表时间: 1982
期刊: Life sciences
影响因子: 6.1
作者:
Reynolds,ES;Moslen,MT;Treinen,RJ
通讯作者: Treinen,RJ
急性四氯化碳中毒期间大鼠肝脏中细胞色素 P-450 特定形式的变化。
DOI: 10.1016/0041-008x(81)90419-1
发表时间: 1981
影响因子: 3.8
作者:
Head,B;Moody,DE;Woo,CH;Smuckler,EA
通讯作者: Smuckler,EA
由 3 碳和 4 碳醇介导的培养肝细胞中细胞色素 p-450 的增加。
DOI: 10.1016/0006-2952(82)90138-1
发表时间: 1982
影响因子: 5.8
作者:
Sinclair,JF;Smith,L;Bement,WJ;Sinclair,PR;Bonkowsky,HL
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