Methodology to assay CYP2E1 mixed function oxidase catalytic activity and its induction.

Methodology to assay CYP2E1 mixed function oxidase catalytic activity and its induction.
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DOI:
10.1016/j.redox.2014.09.007
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发表时间:
2014
期刊:
影响因子:
11.4
通讯作者:
Cederbaum, Arthur I.
Cederbaum, Arthur I.
中科院分区:
生物学1区
文献类型:
--
作者:
Cederbaum, Arthur I.

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细胞色素P450混合功能氧化酶是参与药物代谢的主要催化剂。 P450有多种形式。 CYP2E1 代谢许多毒理学上重要的化合物,包括乙醇,并积极产生活性氧。由于共同主题系列“CYP2E1 和氧化/亚硝化应激在酒精肝毒性作用中的作用”中的几篇文章讨论了 CYP2E1,因此本方法综述描述了如何使用底物探针(例如对硝基苯酚氧化为对硝基儿茶酚和 乙醇氧化成乙醛。验证特定反应的方法,例如药物或毒素的氧化是由 CYP2E1 催化的,或者该反应的诱导是由于 CYP2E1 的诱导,这些都是重要的,并且将讨论使用 CYP2E1 抑制剂、抗 CYP2E1 IgG 或 CYP2E1 敲除和敲入小鼠的具体例子。细胞色素 P4502E1 (CYP2E1) 氧化乙醇并激活肝毒素和致癌物。 CYP2E1 在其催化循环过程中产生活性氧。综述了通过乙醇和对硝基苯酚氧化测定 CYP2E1 的方法。乙醇诱导 CYP2E1 后,这些底物的氧化增强。 CYP2E1 抑制剂、抗 CYP2E1 IgG 和 CYP2E1 基因敲除小鼠可降低这些底物的氧化。
The cytochrome P450 mixed function oxidase enzymes are the major catalysts involved in drug metabolism. There are many forms of P450. CYP2E1 metabolizes many toxicologically important compounds including ethanol and is active in generating reactive oxygen species. Since several of the contributions in the common theme series “Role of CYP2E1 and Oxidative/Nitrosative Stress in the Hepatotoxic Actions of Alcohol” discuss CYP2E1, this methodology review describes assays on how CYP2E1 catalytic activity and its induction by ethanol and other inducers can be measured using substrate probes such as the oxidation of para-nitrophenol to para-nitrocatechol and the oxidation of ethanol to acetaldehyde. Approaches to validate that a particular reaction e.g. oxidation of a drug or toxin is catalyzed by CYP2E1 or that induction of that reaction is due to induction of CYP2E1 are important and specific examples using inhibitors of CYP2E1, anti-CYP2E1 IgG or CYP2E1 knockout and knockin mice will be discussed. Cytochrome P4502E1(CYP2E1) oxidizes ethanol and activates hepatoxins and procarcinogens. CYP2E1 produces reactive oxygen species during its catalytic cycle. Methodology to assay CYP2E1 via oxidation of ethanol and p-nitrophenol is reviewed. Oxidation of these substrates is enhanced after induction of CYP2E1 by ethanol. Oxidation of these substrates is lowered by CYP2E1 inhibitors, anti-CYP2E1 IgG and in CYP2E1 knockout mice.
DOI: 10.1042/bj2390671
发表时间: 1986-11-01
影响因子: 4.1
作者:
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发表时间: 2008-05-01
期刊: HEPATOLOGY
影响因子: 13.5
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影响因子: 3.9
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