Autor: |
Matteo Forloni, Romi Gupta, Arvindhan Nagarajan, Li-Sha Sun, Yuying Dong, Valentina Pirazzoli, Maria Toki, Anna Wurtz, Mary Ann Melnick, Susumu Kobayashi, Robert J. Homer, David L. Rimm, Scott J. Gettinger, Katerina Politi, Shaillay Kumar Dogra, Narendra Wajapeyee |
Jazyk: |
angličtina |
Rok vydání: |
2016 |
Předmět: |
|
Zdroj: |
Cell Reports, Vol 16, Iss 2, Pp 457-471 (2016) |
Druh dokumentu: |
article |
ISSN: |
2211-1247 |
DOI: |
10.1016/j.celrep.2016.05.087 |
Popis: |
Oncogene-induced DNA methylation-mediated transcriptional silencing of tumor suppressors frequently occurs in cancer, but the mechanism and functional role of this silencing in oncogenesis are not fully understood. Here, we show that oncogenic epidermal growth factor receptor (EGFR) induces silencing of multiple unrelated tumor suppressors in lung adenocarcinomas and glioblastomas by inhibiting the DNA demethylase TET oncogene family member 1 (TET1) via the C/EBPα transcription factor. After oncogenic EGFR inhibition, TET1 binds to tumor suppressor promoters and induces their re-expression through active DNA demethylation. Ectopic expression of TET1 potently inhibits lung and glioblastoma tumor growth, and TET1 knockdown confers resistance to EGFR inhibitors in lung cancer cells. Lung cancer samples exhibited reduced TET1 expression or TET1 cytoplasmic localization in the majority of cases. Collectively, these results identify a conserved pathway of oncogenic EGFR-induced DNA methylation-mediated transcriptional silencing of tumor suppressors that may have therapeutic benefits for oncogenic EGFR-mediated lung cancers and glioblastomas. |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
|