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논문 기본 정보

자료유형
학술저널
저자정보
Jung, Ki-Kyung (Department of Pharmacology, Biochemical Pharmacology Team, National Institute of Toxicological Research) Kim, So-Young (Department of Pharmacology, Biochemical Pharmacology Team, National Institute of Toxicological Research) Kim, Tae-Gyun (Department of Pharmacology, Biochemical Pharmacology Team, National Institute of Toxicological Research) Kang, Ju-Hye (Department of Pharmacology, Biochemical Pharmacology Team, National Institute of Toxicological Research) Kang, Seog-Youn (Department of Pharmacology, Biochemical Pharmacology Team, National Institute of Toxicological Research) Kim, Seung-Hee (National Institute of Toxicologyical Research, KFDA) Cho, Jae-Youl (School of Bioscience and Biotechnology and Institute of Bioscience and Biotechnology, Kangwon National University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제30권 제5호
발행연도
2007.1
수록면
616 - 623 (8page)

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It is well Known that endocrine disruptors (EDs) act as anti-estrogenic agents and affect the function of reproductive organ. EDs are also thought to affect thyroid hormone (TH) system which is important for biological functions such as growth, development and metabolism. However, it is still not clear how EDs are able to regulate TH receptor (TR)-mediated functions. in this study, therefore, the modulatory effects of representative EDs such as 2,3,7,8-tetrachlorod-ibenzo-p-dioxin (TCDD), polychlorinated biphenyl (Aroclor 1254) and bisphenol A (BPA) were examined using TR-expressing GH$_3$ cells (a rat pituitary gland epithelial tumor cell line) activated by triiodothyronine (T$_3$). EDs tested significantly blocked T$_3$ binding to TR in a dosedependent manner. Biochemical characterization by Scatchard and Lineweaver-Burk plot analyses indicated that TCDD and aroclor 1254 bound to TH receptors in a competitive inhibitory manner, whereas BPA bound to TH receptors in a non-competitive pattern. The different inhibitory mode of action by EDs was also found in regulating TR-mediated production of prolactin(PRL). Aroclor 1254 exposure for 48 h enhanced 73-mediated PRL production, but BPA downregulated. These results suggest that the EDs (TCDD, Aroclor 1254 and BPA) could differentially bind to TR and distinctly regulate the action of TR function, even though EDs are structurally similar.

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