Gene expression markers in the zebrafish embryo reflect a hepatotoxic response in animal models and humans
| Autor: | Anne S. Kienhuis, Evert-Jan van den Brandhof, Marja Driessen, Jeroen L. A. Pennings, Marianne Roodbergen, Tessa E. Pronk, Leo T.M. van der Ven, Bob van de Water, Alexa P. Vitins |
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| Rok vydání: | 2014 |
| Předmět: |
Genetic Markers
Computational biology Pharmacology Toxicology Risk Assessment Gene Expression Regulation Enzymologic Species Specificity Cholestasis Toxicity Tests Gene expression medicine Animals Cluster Analysis Humans Gene Regulatory Networks Gene Zebrafish Oligonucleotide Array Sequence Analysis biology Gene Expression Profiling Gene Expression Regulation Developmental Cytochrome P450 General Medicine medicine.disease Phenotype Liver Models Animal biology.protein DNA microarray Steatosis Drug metabolism |
| Zdroj: | Toxicology Letters. 230:48-56 |
| ISSN: | 0378-4274 |
| Popis: | The zebrafish embryo (ZFE) is a promising non-rodent model in toxicology, and initial studies suggested its applicability in detecting hepatotoxic responses. Here, we hypothesize that the detailed analysis of underlying mechanisms of hepatotoxicity in ZFE contributes to the improved identification of hepatotoxic properties of new compounds and to the reduction of rodents used for screening. ZFEs were exposed to nine reference hepatotoxicants, targeted at induction of cholestasis, steatosis and necrosis, and two non-hepatotoxic controls. Histopathology revealed various specific morphological changes in the ZFE hepatocytes indicative of cell injury. Gene expression profiles of the individual compounds were generated using microarrays. Regulation of single genes and of pathways could be linked to hepatotoxic responses in general, but phenotype-specific responses could not be distinguished. Hepatotoxicity-associated pathways included xenobiotic metabolism and oxidoreduction related pathways. Overall analysis of gene expression identified a limited set of potential biomarkers specific for a common hepatotoxicity response. This set included several cytochrome P450 genes (cyp2k19, cyp4v7, cyp2aa3), genes related to liver development (pklr) and genes important in oxidoreduction processes (zgc:163022, zgc:158614, zgc:101858 and sqrdl). In conclusion, the ZFE model allows for identification of hepatotoxicants, without discrimination into specific phenotypes. |
| Databáze: | OpenAIRE |
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