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Bioanalytical and instrumental analysis of thyroid hormone disrupting compounds in water sources along the Yangtze River

Bioanalytical and instrumental analysis of thyroid hormone disrupting compounds in water sources along the Yangtze River,10.1016/j.envpol.2010.10.023,

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Bioanalytical and instrumental analysis of thyroid hormone disrupting compounds in water sources along the Yangtze River   (Citations: 1)
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Thyroid hormone (TH) agonist and antagonist activities of water sources along the Yangtze River in China were surveyed by a green monkey kidney fibroblast (CV-1) cell-based TH reporter gene assay. Instrumental analysis was conducted to identify the responsible thyroid-active compounds. Instrumentally derived l-3,5,3′-triiodothyronine (T3) equivalents (T3-EQs) and thyroid receptor (TR) antagonist activity equivalents referring to dibutyl phthalate (DBP-EQs) were calculated from the concentrations of individual congeners. The reporter gene assay demonstrated that three out of eleven water sources contained TR agonist activity equivalents (TR-EQs), ranging from 286 to 293 ng T3/L. Anti-thyroid hormone activities were found in all water sources with the TR antagonist activity equivalents referring to DBP (Ant-TR-EQs), ranging from 51.5 to 555.3 μg/L. Comparisons of the equivalents from instrumental and biological assays suggested that high concentrations of DBP and di-2-ethylhexyl phthalate (DEHP) were responsible for the observed TR antagonist activities at some locations along the Yangtze River.
Journal: Environmental Pollution - ENVIRON POLLUT , vol. 159, no. 2, pp. 441-448, 2011
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