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多溴联苯醚对大鼠肝细胞CYP1A2依赖性MROD活性的影响     被引量:9

MROD Analysis of Competitive Inhibition from Polybrominated Diphenyl Ethers to CYP 1A2 in Rat Hepatocytic Microsomes

文献类型:期刊文献

中文题名:多溴联苯醚对大鼠肝细胞CYP1A2依赖性MROD活性的影响

英文题名:MROD Analysis of Competitive Inhibition from Polybrominated Diphenyl Ethers to CYP 1A2 in Rat Hepatocytic Microsomes

作者:聂芳红[1];陈进军[2];Bunce Nigel[3]

机构:[1]广东海洋大学食品科技学院;[2]广东海洋大学动物医学系;[3]Dept.of Chemistry and Biochemistry,University of Guelph,Guelph,Ontario,N1G 2W1,Canada

年份:2005

卷号:21

期号:12

起止页码:11

中文期刊名:中国农学通报

外文期刊名:Chinese Agricultural Science Bulletin

收录:CSTPCD、、CSCD_E2011_2012、CSCD

基金:教育部留学回国人员科研启动基金(教外司[2003]406号)广东海洋大学SCI源刊作者奖励基金(0412130)

语种:中文

中文关键词:MROD分析法;CYP1A2;多溴联苯醚;大鼠

外文关键词:MROD assay, CYP 1A2, Polybrominated diphenyl ethers, Rat

中文摘要:采用未成熟SD大鼠肝细胞微粒体为试验材料,以2,3,7,8-四氯-二苯基-并-二哑噁英(2,3,7,8- tetrachlorobenzo-p-dioxin,TCDD)作为参照,利用甲氧基-异酚噁脱甲基酶(methoxyresorufin-O- demethylase,MROD)竞争性抑制动力学和荧光光谱法分析法,测定了5种多溴联苯(polybrominated diphenyl ethers,PBDEs)对7-甲氧基-异酚噁唑脱甲基反应的影响,间接研究了这些PBDEs对CYP1A2 的竞争性抑制作用。结果表明,和TCDD相比,PBDEs对MROD活性的抑制作用较弱,亦即对CYP1A2的 竞争性抑制作用较弱。

外文摘要:The role of a number of polybrominated diphenyl ethers (PBDEs) as inhibitors of the demethylation of 7-methoxyresorufin, a process that is selectively catalyzed by cytochrome P450 1A2 (CYP1A2), was examined, using methoxyresorufin-O-demethylase (MROD) fluorescent assay and competitive inhibition constant Ki determination. It was found that those examined PBDEs showed punier inhibiting effects to MROD / CYPtA2 than that of 2,3,7,8-Tetrachlorobenzo-p-dioxin (TCDD) which is the strongest inhibitor of MROD / CYP1A2 activity in dioxin-like compounds.

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