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首页> 外文期刊>Environmental Science & Technology >Chlorobiphenyls: Model Compounds for Metabolism in Food Chain Organisms and Their Potential Use as Ecotoxicological Stress Indicators by Application of the Metabolic Slope Concept
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Chlorobiphenyls: Model Compounds for Metabolism in Food Chain Organisms and Their Potential Use as Ecotoxicological Stress Indicators by Application of the Metabolic Slope Concept

机译:氯代苯基:在食物链生物中代谢的模型化合物及其通过代谢斜坡概念的应用作为生态毒理学胁迫指标

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摘要

A model is described to explain the compositional similarities and differences in chlorobiphenyls (CBs) in members of marine food chains, including water. Four groups of CBs are distinguished based on the presence/absence of vicinal H-atoms in o,m and/ or m,p vicinal H-atoms, according to structure-activity relations for their biotransformation by cytochrome P-450 1A and 2B isozymes. Contents of CBs (X) in water, diatom, mussel, copepod, worm, shrimp, flounder, herring, and harbor porpoise were transformed into molar X/153 ratios (CB-153 is persistent) and plotted against X/153 ratios in diatom, lacking metabolic efficiency. For each metabolic group, a linear plot results. Their slopes indicate relative metabolic efficiencies of cytochrome P-450 isozymes. Indication of PB-type enzyme activity in harbor porpoise, flounder, and herring that was not observed before biochemically is new. Metabolic slopes of CBs can also be used as environmental stress indicators by comparison of slopes in a selected organism in areas with different degrees of contamination.
机译:描述了一个模型来解释海洋食物链(包括水)成员中氯联苯(CB)的组成相似性和差异。根据o,m和/或m,p邻位H原子中是否存在邻位H原子,根据它们通过细胞色素P-450 1A和2B同工酶进行生物转化的结构-活性关系,区分出四类CB。 。将水,硅藻,贻贝,co足类,蠕虫,虾,比目鱼,鲱鱼和海豚鼠体内的CB(X)含量转换为X / 153摩尔比(CB-153是持续的),并针对硅藻中的X / 153比绘制,缺乏代谢效率。对于每个代谢组,将得出线性图。它们的斜率表明细胞色素P-450同工酶的相对代谢效率。在生化之前未观察到的海港海豚,比目鱼和鲱鱼中PB型酶活性的指示是新的。通过比较选定生物体在不同污染程度的区域中的斜率,CB的代谢斜率也可以用作环境压力指标。

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