Abstract
Downregulation of E-cadherin is a crucial event for epithelial to mesenchymal transition (EMT) in embryonic development and cancer progression. Using the EpFosER mammary tumour model we show that during EMT, upregulation of the transcription al regulator deltaEF1 coincided with transcriptional repression of E-cadherin. Ectopic expression of deltaEF1 in epithelial cells was sufficient to downregulate E-cadherin and to induce EMT. Analysis of E-cadherin promoter activity and chromatin immunoprecipitation identified deltaEF1 as direct transcriptional repressor of E-cadherin. In human cancer cells, transcript levels of deltaEF1 correlated directly with the extent of E-cadherin repression and loss of the epithelial phenotype. The protein was enriched in nuclei of human cancer cells and physically associated with the E-cadherin promoter. RNA interference-mediated downregulation of deltaEF1 in cancer cells was sufficient to derepress E-cadherin expression and restore cell to cell adhesion, suggesting that deltaEF1 is a key player in late stage carcinogenesis. © 2005 Nature Publishing Group All rights reserved.
Original language | English |
---|---|
Pages (from-to) | 2375-2385 |
Number of pages | 11 |
Journal | Oncogene |
Volume | 24 |
Issue number | 14 |
DOIs | |
Publication status | Published - 17 Jan 2005 |
Keywords
- protein deltaEF1
- repressor protein
- unclassified drug
- uvomorulin
- cadherin
- homeodomain protein
- primer DNA
- TCF8 protein
- human
- transcription factor
- article
- breast cancer
- breast tumor
- cancer growth
- carcinogenesis
- cell adhesion
- cell transformation
- controlled study
- epithelium cell
- human cell
- immunoprecipitation
- mesenchyme
- phenotype
- plasticity
- priority journal
- protein expression
- RNA interference
- transcription regulation
- genetic transcription
- genetics
- metabolism
- nucleotide sequence
- pathology
- physiology
- promoter region
- Base Sequence
- Breast Neoplasms
- Cadherins
- DNA Primers
- Epithelial Cells
- Homeodomain Proteins
- Humans
- Promoter Regions (Genetics)
- Repressor Proteins
- Transcription Factors
- Transcription
- Genetic