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Some heterocyclic aromatic compounds are Ah receptor agonists in the DR-CALUX assay and the EROD assay with RTL-W1 cells
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2011 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 18, no 8, p. 1297-1304Article in journal (Refereed) Published
Abstract [en]

Purpose Heterocyclic aromatic compounds containing nitrogen, sulfur, or oxygen heteroatoms (NSO-HET) have been detected in air, soil, marine, and freshwater systems. However, only few publications are available investigating NSO-HET using in vitro bioassays. To support better characterization of environmental samples, selected NSO-HET were screened for dioxin-like activity in two bioassays. Methods The present study focuses on the identification and quantification of dioxin-like effects of 12 NSO-HET using the DR-CALUX assay, and the 7-ethoxyresorufin-O-deethylase (EROD) assay with the permanent fish liver cell line RTL-W1. Changes of the total medium compound concentrations during the test procedure due to, e.g., sorption or volatilization were quantified using GC/MS. Results The NSO-HET benzofuran, 2,3-dimethylbenzofuran, dibenzofuran, dibenzothiophen, acridine, xanthene, and carbazole caused a response in the DR-CALUX assay. Only benzofuran and 2,3-dimethylbenzofuran were also positive in the EROD assay. All other compounds were inactive in the EROD assay. Relative potency (REP) values ranged from (2.80 +/- 1.32) center dot 10(-8) to (3.26 A +/- 2.03) A center dot 10(-6) in the DR-CALUX and from (3.26 A +/- 0.91) A center dot 10(-7) to (4.87 A +/- 1.97) A center dot 10(-7) in the EROD assay. Conclusions The REP values were comparable to those of larger polycyclic aromatic hydrocarbons, e.g., fluoranthene and pyrene. Thus, and because of the ubiquitous distribution of heterocyclic aromatic compounds in the environment, the provided data will further facilitate the bioanalytical and analytical characterization of environmental samples towards these toxicants.

Place, publisher, year, edition, pages
Springer, 2011. Vol. 18, no 8, p. 1297-1304
Keywords [en]
Heterocyclic aromatic compounds, NSO-HET, EROD, DR-CALUX, Ah receptor
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:oru:diva-17018DOI: 10.1007/s11356-011-0483-7ISI: 000293899700006PubMedID: 21431309Scopus ID: 2-s2.0-80051668115OAI: oai:DiVA.org:oru-17018DiVA, id: diva2:439382
Available from: 2011-09-07 Created: 2011-09-02 Last updated: 2017-12-08Bibliographically approved

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Takner [Olsman], HelenaEngwall, Magnus

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