Considerations for potency equivalent calculations in the Ah receptor-based CALUX bioassay: normalization of superinduction results for improved sample potency estimation.

Considerations for potency equivalent calculations in the Ah receptor-based CALUX bioassay: normalization of superinduction results for improved sample potency estimation.
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DOI:
10.1016/j.talanta.2010.11.035
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发表时间:
2011-02-15
期刊:
影响因子:
6.1
通讯作者:
Denison, Michael S.
Denison, Michael S.
中科院分区:
化学1区
文献类型:
--
作者:
Baston, David S.;Denison, Michael S.

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化学激活荧光素酶表达(CALUX)系统是一种基于机械的重组荧光素酶报告基因细胞生物测定,与化学提取和清理方法结合使用,用于检测和相对定量2,3,7,8-四氯二苯并-对-二恶英和相关二恶英类卤代芳烃在各种样品基质中。虽然含有化学品复杂混合物的样品提取物可在CALUX细胞中产生各种不同的浓度依赖性荧光素酶诱导反应,但这些作用是通过共同的作用机制(即Ah受体(AhR))产生的,从而使结果和样品效价测定标准化。在这里,我们描述了多样性的CALUX响应PCDD/Fs从沉积物和土壤提取物,不仅报告发生的超诱导的CALUX生物测定,但我们描述了一个机械为基础的超诱导数据,结果在一个更准确的估计,这样的样品提取物的相对效力的标准化方法。
The chemically activated luciferase expression (CALUX) system is a mechanistically based recombinant luciferase reporter gene cell bioassay used in combination with chemical extraction and clean-up methods for the detection and relative quantitation of 2,3,7,8-tetrachlorodibenzo-p-dioxin and related dioxin-like halogenated aromatic hydrocarbons in a wide variety of sample matrices. While sample extracts containing complex mixtures of chemicals can produce a variety of distinct concentration-dependent luciferase induction responses in CALUX cells, these effects are produced through a common mechanism of action (i.e. the Ah receptor (AhR)) allowing normalization of results and sample potency determination. Here we describe the diversity in CALUX response to PCDD/Fs from sediment and soil extracts and not only report the occurrence of superinduction of the CALUX bioassay, but we describe a mechanistically based approach for normalization of superinduction data that results in a more accurate estimation of the relative potency of such sample extracts.
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