Guinea Pig Liver Cytochrome P450 Responsible for 3-Hydroxylation of 2,5,2′,5′-Tetrachlorobiphenyl

Guinea Pig Liver Cytochrome P450 Responsible for 3-Hydroxylation of 2,5,2′,5′-Tetrachlorobiphenyl
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豚鼠肝脏细胞色素 P450 负责 2,5,2′,5′-四氯联苯的 3-羟基化

DOI:
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发表时间:
1998
影响因子:
2.7
通讯作者:
H. Yoshimura
H. Yoshimura
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
N. Koga;T. Kanamaru;N. Kikuichi;N. Oishi;S. Kato;H. Yoshimura

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2,5,2 ',5'-四氯联苯(TCB)是多氯联苯制剂Kanechlor 400的主要成分之一,该制剂于1968年在日本引起了一场名为Yusho的大规模食物中毒(Kuratsune 1996),并具有苯巴比妥(PB)型诱导大鼠肝微粒体酶的能力(Yoshimura等人1979)。该PCB异构体的主要代谢途径是细胞色素P450(P450)催化的芳香环3-羟基化。到目前为止,已知两组P450超家族,即CYP 1A和CYP 2B亚家族,参与哺乳动物中PCBs的羟基化(古贺and Yoshimura 1996)。特别是,2,5,2 ',5'-TCB的3-羟基化由属于CYP 2B亚家族的一些P450亚型催化,例如大鼠肝脏中的CYP 2B 1和2B 2以及仓鼠肝脏中的P450 HPB-1(Ishida et al. 1990;古贺et al. 1995 a)。
2,5,2',5'-Tetrachlorobiphenyl (TCB) is one of the major components of PCB preparation, Kanechlor 400, which caused a mass food poisoning called Yusho in Japan in 1968 (Kuratsune 1996) and has phenobarbital (PB)-type inducing ability of rat liver microsomal enzymes (Yoshimura et al. 1979). The main metabolic pathway of this PCB isomer is 3-hydroxylation of aromatic ring catalyzed by cytochrome P450 (P450). So far, two groups of P450 superfamily, namely CYP1A and CYP2B subfamily, have been known to be involved in the hydroxylation of PCBs in mammals (Koga and Yoshimura 1996). In particular, the 3-hydroxylation of 2,5,2',5'-TCB is catalyzed by some P450 isoforms belonging to CYP2B subfamily, for example, CYP2B1 and 2B2 in rat liver and P450HPB-1 in hamster liver (Ishida et al. 1990; Koga et al. 1995a).
DOI: 10.1016/0003-9861(87)90396-1
发表时间: 1987-06-01
影响因子: 3.9
作者:
DUIGNAN, DB;SIPES, IG;HALPERT, JR
通讯作者: HALPERT, JR