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Identification of estrogenic activity of chlorinated bisphenol A using a GFP expression system.

Abstract：

:A green fluorescent protein (GFP)-reporter vector regulated by an estrogen response element (ERE) was constructed and transfected into human breast carcinoma MCF7 cells. Stable transfectants were selected and their GFP fluorescence intensity was measured using a quantitative fluorescent imaging system. 17β-estradiol (E(2)) and bisphenol A (BPA) induced a dose-dependent increase in GFP intensity in the cells, reaching maximum response at 5×10(-10) and 10(-5) M, respectively. Using this GFP expression system, we examined the estrogenicity of mono-, di-, tri-, and tetra-chlorinated BPAs, which were detected in wastewater from waste-paper recycling plants using sodium hypochlorite as a bleaching agent. 3-ClBPA and 3,3'-diClBPA showed similar estrogenicities, effective at lower concentrations than parent BPA. On the other hand, the maximum activities of BPA and 3,3',5-triClBPA, whose EC(50) were similar, were higher than other chlorinated BPAs. This is the first demonstration of the estrogenicity of chlorinated BPAs. Since polychlorinated BPAs were not easily biodegraded, chlorinated BPAs might be more severe endocrine disruptors than BPA.

journal_name

Environ Toxicol Pharmacol

journal_title

Environmental toxicology and pharmacology

authors

Kuruto-Niwa R,Terao Y,Nozawa R

doi

10.1016/s1382-6689(02)00011-x

subject

Has Abstract

pub_date

2002-08-01 00:00:00

pages

27-35

issue

1

eissn

1382-6689

issn

1872-7077

pii

S1382-6689(02)00011-X

journal_volume

12

pub_type

杂志文章

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