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Relative difference...
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Olsman [Takner], HelenaÖrebro universitet,Institutionen för naturvetenskap,Bioanalytisk miljötoxikologi
(författare)
Relative differences in aryl hydrocarbon receptor-mediated response for 18 polybrominated and mixed halogenated dibenzo-p-dioxins and -furans in cell lines from four different species
- Artikel/kapitelEngelska2007
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:oru-4714
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https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-4714URI
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https://doi.org/10.1897/07-004R.1DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:vet swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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As a consequence of ubiquitous use of brominated organic chemicals, there is a concern for persistent or increasing environmental levels of polybrominated dibenzo-p-dioxins/furans (PBDD/Fs) and mixed polychlorinated and polybrominated dibenzo-p-dioxins/furans (PXDD/Fs). Hence, there is a need to broaden the toxicological and environmental knowledge about these compounds, as a basis for risk assessment. In the study presented here, the relative potencies (REPs) for 18 PBDD/F and PXDD/ F congeners were determined in four dioxin-specific bioassays from different species: dioxin receptor chemically activated luciferase expression assay (DR-CALUX, rat hepatoma cells), TV101L (human hepatoma cells), and GPC.2D (guinea pig adenoma cells), as well as ethoxyresorufin-O-deethylase induction in the fish cell line RTL-W1 (rainbow trout liver cells). The bioassay specific REP factors presented here enable the assessment of the contribution from PBDD/Fs and PXDD/Fs to total 2,3,7,8-tetrachl orodibenzop-dioxin (TCDD) equivalents (TEQs: toxic equivalents), using bioassay analysis. The PBDD/Fs were found to be equally potent as their chlorinated analogues in the three mammalian assays, whereas the PXDD/Fs showed relatively higher potencies. Of special concern were the 2,3,7,8-substituted penta- and tetrahalogenated congeners, for which mean REPs were >= 1. The 2-B-1,3,7,8-CDD (2-bromo-1,3,7,8-tetrachlorodibenzo-p-dioxin) was up to three times more potent than TCDD in individual experiments (on weight basis). The RTL-W1 was less sensitive to the tested compounds with overall 10-fold lower REPs than the mammalian cell lines. Although the REP factors exhibited species-specific differences, overall resembling rank orders of dioxin-like potency were obtained.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Engwall, MagnusÖrebro universitet,Institutionen för naturvetenskap,Bioanalytisk miljötoxikologi(Swepub:oru)mel
(författare)
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Kammann, Ulrike
(författare)
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Klempt, Martin
(författare)
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Otte, Jens
(författare)
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van Bavel, BertÖrebro universitet,Institutionen för naturvetenskap(Swepub:oru)bvl
(författare)
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Hollert, Henner
(författare)
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Örebro universitetInstitutionen för naturvetenskap
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Environmental Toxicology and Chemistry26:11, s. 2448-24540730-72681552-8618
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