TCDD induces c-jun expression via a novel Ah (dioxin) receptor-mediated p38–MAPK-dependent pathway
| Autor: | Dagmar Faust, Martin Göttlicher, Heike Dürk, Franz Oesch, Cornelia Dietrich, Anke Pelzer, Siva Kumar Kolluri, Carsten Weiss, Sandra M. Schneider |
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| Rok vydání: | 2005 |
| Předmět: |
MAPK/ERK pathway
Cancer Research Polychlorinated Dibenzodioxins Proto-Oncogene Proteins c-jun p38 mitogen-activated protein kinases Biology Transfection Proto-Oncogene Mas p38 Mitogen-Activated Protein Kinases Genes Reporter Cell Line Tumor Genetics Humans RNA Neoplasm RNA Small Interfering Protein kinase A Molecular Biology Transcription factor DNA Primers Base Sequence Kinase c-jun respiratory system Aryl hydrocarbon receptor respiratory tract diseases Gene Expression Regulation Neoplastic Receptors Aryl Hydrocarbon Mitogen-activated protein kinase biology.protein Cancer research |
| Zdroj: | Oncogene. 24:4975-4983 |
| ISSN: | 1476-5594 0950-9232 |
| DOI: | 10.1038/sj.onc.1208679 |
| Popis: | The aryl hydrocarbon receptor (AhR) has a fundamental role during postnatal liver development and is essential for mediating dioxin toxicity. However, the genetic programs mediating, both, the toxic and physiological effects downstream of the transcription factor AhR are in major parts unknown. We have identified the proto-oncogene c-jun as a novel target gene of AhR. Induction of c-jun depends on activation of p38-mitogen-activated protein kinase (MAPK) by an AhR-dependent mechanism. None of the kinases that are known to phosphorylate p38-MAPK is activated by AhR. Neither the dephosphorylation rate of p38-MAPK is reduced. Furthermore, increased p38-MAPK phosphorylation in response to dioxins does not require ongoing transcription. These findings establish activating 'cross-talk' with MAPK signaling as a novel principle of AhR action, which is apparently independent of the AhR's function as a DNA-binding transcriptional activator. |
| Databáze: | OpenAIRE |
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