國家衛生研究院 NHRI:Item 3990099045/3772

NHRI > National Institute of Environmental Health Sciences > Tsui-Chun Tsou > Periodical Articles > Item 3990099045/3772

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/3772

Title:	The inhibition effect of 2,3,7,8-tetrachlorinated dibenzo-p-dioxin-induced aryl hydrocarbon receptor activation in human hepatoma cells with the treatment of cadmium chloride
Authors:	Chao, HR;Tsou, TC;Chen, HT;Chang, EE;Tsai, FY;Lin, DY;Chen, FA;Wang, YF
Contributors:	Division of Environmental Health and Occupational Medicine
Abstract:	Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), considered as endocrine disruptors, tend to accumulate in fatty tissues. Dioxin-responsive element chemical activated luciferase gene expression assay (DRE-luciferase assay) has been recognized as a semi-quantitative method for screening dioxins for its fast and low-cost as compared with HRGC/HRMS. However, some problems with the bioassay, including specificity, detection variation resulted from different cleanup strategies, and uncertainty of false-negative or false-positive results, remain to be overcome. Cadmium is a prevalent environmental contaminant around the world. This study was aimed to examine the effects of cadmium on the 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-induced activation of aryl hydrocarbon receptor (AhR)-mediated gene expression in human hepatoma cells (Huh7-DRE-Luc cells and Huh7 cells). Ethoxyresorufin-O-deethylase (EROD) and DRE-luciferase assay were employed to determine the enzyme activity of cytochrome P450 1A1 (CYP1A1) and activation of AhR, respectively. The results showed that Cd2+ levels significantly inhibited the induction of TCDD-induced CYP1A1 and DRE luciferase activation in hepatoma cells. The 50% inhibited concentrations (IC50) of CdCl2 were 0.414 μM (95% confidence interval (C.I.): 0.230-0.602 μM) in Huh7-DRE-Luc cells and 23.2 μM (95% C.I.: 21.7-25.4 μM) in Huh7 cells. Accordingly, prevention of interference with non-dioxin-like compounds in a DRE-luciferase assay is of great importance in an extensive cleanup procedure.
Date:	2009-10-15
Relation:	Journal of Hazardous Materials. 2009 Oct 15;170(1):351-356.
Link to:	http://dx.doi.org/10.1016/j.jhazmat.2009.04.090
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0304-3894&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000269162000050
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=67749132433
Appears in Collections:	[Tsui-Chun Tsou] Periodical Articles

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