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- W2892094843 abstract "In order to contribute to a comprehensive understanding of the regulating mechanisms of the aryl-hydrocarbon-receptor (AHR) in zebrafish embryos, we aimed to elucidate the interaction of proteins taking part in this signaling pathway during early development of the zebrafish (Danio rerio) after chemical exposure. We managed to illustrate initial transcription processes of the implemented proteins after exposure to two environmentally relevant chemicals: polychlorinated biphenyl 126 (PCB126) and β-Naphthoflavone (BNF). Using qPCR, we quantified mRNA every 4 h until 118 h post fertilization and found the expression of biotransformation enzymes (cyp1 family) and the repressor of the AHR (ahr-r) to be dependent on the duration of chemical exposure and the biodegradability of the compounds. PCB126 induced persistently increased amounts of transcripts as it is not metabolized, whereas activation by BNF was limited to the initial period of exposure. We did not find a clear relation between the amount of transcripts and activity of the induced CYP-proteins, so posttranscriptional mechanisms are likely to regulate biotransformation of BNF. With regard to zebrafish embryos and their application in risk assessment of hazardous chemicals, our examination of the AHR pathway especially supports the relevance of the time point or period of exposure that is used for bioanalytical investigations and consideration of chemical properties determining biodegradability." @default.
- W2892094843 created "2018-09-27" @default.
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- W2892094843 date "2018-11-01" @default.
- W2892094843 modified "2023-10-16" @default.
- W2892094843 title "A temporal high-resolution investigation of the Ah-receptor pathway during early development of zebrafish (Danio rerio)" @default.
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- W2892094843 doi "https://doi.org/10.1016/j.aquatox.2018.09.007" @default.
- W2892094843 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30245344" @default.
- W2892094843 hasPublicationYear "2018" @default.
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