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首页> 外文期刊>Environmental Science & Technology >Chicken Embryo Hepatocyte Bioassay for Measuring Cytochrome P4501A-Based 2,3,7,8-Tetrachlorodibenzo-p-dioxin Equivalent Concentrations in Environmental Samples
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Chicken Embryo Hepatocyte Bioassay for Measuring Cytochrome P4501A-Based 2,3,7,8-Tetrachlorodibenzo-p-dioxin Equivalent Concentrations in Environmental Samples

机译:鸡胚肝细胞生物测定法用于测量环境样品中基于细胞色素P4501A的2,3,7,8-四氯二苯并-p-二恶英当量浓度

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摘要

A bioassay that uses chicken embryo hepatocyte (CEH) primary cultures for measuring 2,3,7,8-tetrachlo-rodibenzo-p-dioxin equivalent (TCDD-EQ) concentrations in extracts prepared from wild bird eggs contaminated with complex mixtures of polychlorinated biphenyls (PCBs), dibenzp-p-dioxins (PCDDs), diben-zofurans (PCDFs), and other halogenated aromatic hydrocarbons is described. The CEH bioassay uses an efficient method for measuring ethoxyresorufin-O-deethylase (EROD) in hepatocytes cultured in 48-well plates to obtain bioassay-derived TCDD-EQ concentrations (TCDD-EQ_(bio)). Induction equivalency factors (IEFs) were determined for 39 PCB congeners, 2,3,7,8-TCDD, 1,2,3,7,8-PCDD, and 2,3,7,8-TCDF. TCDD-EQ_(bio) concentrations in eggs from herring gulls, Larus argentatus, and great blue herons, Ardea herodias, were highly correlated with TCDD-EQ concentrations calculated (TCDD-EQ_(calc)) from chemical residue data and lEFs (r~2 = 0.977, slope = 0.99). Unlike other in vitro bioassays, 2,2′,3,4,4′,5′-hexachlorobiphenyl (PCB 138) made a significant contribution to TCDD-EQ_(calc) in CEH cultures. TCDD-EQ_(bio) concentrations were also highly correlated to TCDD-EQ_(calc) obtained using toxic equivalency factors (TEFs) derived from various in vivo and in vitro toxic and biochemical end points. The CEH bioassay is a cost-effective method for measuring TCDD-EQ_(bio) concentrations in environmental samples.
机译:一种生物测定法,该方法使用鸡胚肝细胞(CEH)原代培养物测量从受多氯联苯复杂混合物污染的野禽卵中提取的提取物中的2,3,7,8-四氯-罗二苯并-对-二恶英当量(TCDD-EQ)浓度(PCBs),二苯并-对-二恶英(PCDDs),二苯并呋喃(PCDFs)和其他卤化芳烃。 CEH生物测定法是一种有效的方法,用于测量在48孔板中培养的肝细胞中的乙氧基异戊二烯-O-脱乙基酶(EROD),以获得生物测定法衍生的TCDD-EQ浓度(TCDD-EQ_(bio))。确定了39个PCB同系物,2、3、7、8-TCDD,1、2、3、7、8-PCDD和2、3、7、8-TCDF的感应当量因子(IEF)。鲱鸥,黑鸥和大蓝鹭(苍鹭)卵中的TCDD-EQ_(生物)浓度与根据化学残留数据和lEFs计算的TCDD-EQ浓度(TCDD-EQ_(calc))高度相关。 2 = 0.977,斜率= 0.99)。与其他体外生物测定不同,2,2',3,4,4',5'-六氯联苯(PCB 138)对CEH培养物中的TCDD-EQ_(calc)做出了重大贡献。 TCDD-EQ_(生物)浓度也与使用从体内和体外各种毒性和生化终点得出的毒性当量因子(TEF)获得的TCDD-EQ_(calc)高度相关。 CEH生物测定法是一种用于测量环境样品中TCDD-EQ_(bio)浓度的经济有效的方法。

著录项

  • 来源
    《Environmental Science & Technology》 |1996年第2期|p.706-715|共10页
  • 作者单位

    Environment Canada, Canadian Wildlife Service, National Wildlife Research Centre, Hull, Quebec, Canada K1A 0H3;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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