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DIGITAL.CSIC
Article . 2010 . Peer-reviewed
Data sources: DIGITAL.CSIC
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Journal of Cell Science
Article . 2009 . Peer-reviewed
Data sources: Crossref
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The class I bHLH factors E2-2A and E2-2B regulate EMT

Authors: Sobrado, Verónica R.; Moreno-Bueno, Gema; Cubillo, Eva; Holt, Liam J.; Nieto, M. Ángela; García del Portillo, Francisco; Cano, Amparo;

The class I bHLH factors E2-2A and E2-2B regulate EMT

Abstract

Functional loss of the cell-cell adhesion molecule E-cadherin is an essential event for epithelial-mesenchymal transition (EMT), a process that allows cell migration during embryonic development and tumour invasion. In most carcinomas, transcriptional repression has emerged as the main mechanism responsible for E-cadherin downregulation. Here, we report the identification of class I bHLH factor E2-2 (TCF4/ITF2) as a new EMT regulator. Both isoforms of E2-2 (E2-2A and E2-2B) induce a full EMT when overexpressed in MDCK cells but without affecting the tumorigenic properties of parental cells, in contrast to other EMT inducers, such as Snail1 or class I bHLH E47. E-cadherin repression mediated by E2-2 is indirect and independent of proximal E-boxes of the promoter. Knockdown studies indicate that E2-2 expression is dispensable for maintenance of the EMT driven by Snail1 and E47. Comparative gene-profiling analysis reveals that E2-2 factors induce similar, yet distinct, genetic programs to that induced by E47 in MDCK cells. These results, together with the embryonic expression pattern of Tcf4 and E2A (which encodes E12/E47), support a distinct role for E2-2 and suggest an interesting interplay between E-cadherin repressors in the regulation of physiological and pathological EMT processes.

Keywords

Transcription Factor 7-Like 1 Protein, Bhlh E2-2, Epithelium, Mesoderm, Mice, Tumour progression, Dogs, Gene profiling, Cell Movement, Cell Line, Tumor, Basic Helix-Loop-Helix Transcription Factors, Animals, Humans, Neoplasm Invasiveness, RNA, Small Interfering, Promoter Regions, Genetic, Gene Expression Profiling, Emt, Epithelial Cells, E-cadherin repression, Cadherins, Embryo, Mammalian, Snail, Carcinoma, Squamous Cell, Snail Family Transcription Factors, E47, TCF Transcription Factors

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
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116
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