Add time:09/29/2019 Source:sciencedirect.com
The association of suspected endocrine-disrupting chemicals (EDCs), diethylstilbestrol (DES), Ioxynil (cas 1689-83-4) and pentachlorophenol (PCP), with chicken serum proteins was investigated in relation to thyroid system disruption. All of these chemicals strongly inhibited l-[125I]thyroxine ([125I]T4) binding to purified transthyretin (TTR) whereas PCP was less potent inhibitor than DES and ioxynil of [125I]T4 binding to diluted whole chicken serum. This result suggested that PCP interacted with serum proteins other than TTR in whole chicken serum. Following the incubation of chicken serum with each chemical (final concentrations 0.25–1.0 µM), serum proteins were fractionated by gel filtration chromatography (Cellulofine GCL-1000) and affinity chromatography (human retinol-binding protein coupled to Sepharose 4B). Although all chemicals were detected in the gel filtration chromatography 50–100 kDa fractions, DES and ioxynil, but not PCP, were co-eluted with TTR during affinity chromatography. Our results indicated that a significant proportion of DES and ioxynil, but a low proportion of PCP, interacted with TTR in whole chicken serum.
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