Metabolism of vinyl halides: in vitro studies on roles of potential activated metabolites.

Metabolism of vinyl halides: in vitro studies on roles of potential activated metabolites.
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卤乙烯的代谢:潜在活化代谢物作用的体外研究。

DOI:
10.1007/978-1-4757-0674-1_50
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发表时间:
1981
影响因子:
--
通讯作者:
Guengerich,FP
Guengerich,FP
中科院分区:
医学4区
文献类型:
--
作者:
Guengerich,FP

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氯乙烯(VC)已被证明对动物和人类是有毒和致癌的(Maltoni和Lefemine,1974)。溴乙烯(VBR)似乎也具有肝脏毒性和致癌作用(Conolly等人,1978年)。Barbin等人。(1975)指出,Vc和VBR均可被NADPH强化的肝微体系统激活为反应性嗜电体。其他一些研究有力地表明,卤化乙烯的混合功能氧化是导致代谢产物与这些化合物发生突变和不可逆结合的原因(Bartsch和Montesano,1975;Bolt等人,1975;Hefner等人,1975;Henschler和Bonse,1977;Guengerich和Watanabe,1979)。通常建议的反应性代谢物是2-卤代环氧乙烷。然而,这些化合物重排成2-卤代乙醛,这也与潜在的亲核目标反应。在这里介绍的研究中,我们利用卤化乙烯标记与蛋白质和DNA的不可逆结合作为激活指标,检测了高纯度酶在微粒体孵育系统中特异性破坏这些假定的反应中间体的能力。
Vinyl chloride (VC) has been shown to be toxic and carcinogenic in animals and humans (Maltoni and Lefemine, 1974). Vinyl bromide (VBr) also appears to be hepatotoxic and carcinogenic (Conolly et al., 1978). Barbin et al. (1975) indicated that both VC and VBr can be activated to reactive electrophiles by liver microsomal systems fortified with NADPH. A number of other studies strongly suggest that mixed-function oxidation of vinyl halides is responsible for the mutagenesis and irreversible binding of metabolites that is observed with these compounds (Bartsch and Montesano, 1975; Bolt et al., 1975; Hefner et al., 1975; Henschler and Bonse, 1977; Guengerich and Watanabe, 1979). A commonly suggested reactive metabolite is a 2-haloethylene oxide. However, such compounds rearrange to 2-haloacetaldehydes, which also react with potential nucleophilic targets. In the studies presented here, we examined the ability of highly purified enzymes to specifically destroy these postulated reactive intermediatesinsituin microsomal incubation systems, utilizing irreversible binding of vinyl halide labels to protein and DNA as indices of activation.
肝脏和肝外细胞色素 P-450 的免疫学比较。
DOI: --
发表时间: 1979
影响因子: 3.6
作者:
F. Guengerich;P. Mason
通讯作者: P. Mason
[14C]-和[36C]-标记的氯乙烯在体内和体外的代谢。
DOI: 10.1016/0006-2952(79)90140-0
发表时间: 1979
影响因子: 5.8
作者:
F. Guengerich;P. Watanabe
通讯作者: P. Watanabe
DOI: --
发表时间: 1977
影响因子: 4.8
作者:
F. Guengerich
通讯作者: F. Guengerich
DOI: --
发表时间: 1978
影响因子: 4.8
作者:
G. Dubois;E. Appella;W. Levin;A. Y. Lu;D. Jerina
通讯作者: D. Jerina
DOI: 10.1021/bi00769a001
发表时间: 1972-01-01
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
SECRIST, JA;WEBER, G;BARRIO, JR
通讯作者: BARRIO, JR