期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 442, 期 1-2, 页码 133-138出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2013.11.031
关键词
EMT; LEF-1; beta-Catenin; Slug; ZEB1
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Kodama Memorial Found for Medical Research
The epithelial-mesenchymal transition (EMT), a key process in the tumor metastatic cascade, is characterized by the loss of cell-cell junctions and cell polarity, as well as the acquisition of migratory and invasive properties. LEF-1 is a member of the lymphoid enhancer-binding factor/T-cell factor (LEF/TCF) family of DNA-binding transcription factors, which interact with nuclear beta-catenin and act as central transcriptional mediators of Wnt signaling. To investigate the role of LEF-1 in EMT, we generated stable LEF-1 transfectants using MDCK cells. The transfectants had a spindle-shaped mesenchymal morphology, and enhanced migration and invasiveness relative to control cells. These EMT changes were accompanied by the downregulation of an epithelial marker protein, E-cadherin, and the upregulation of mesenchymal marker proteins, vimentin and N-cadherin. Consistent with these observations, the mRNA levels of Slug, ZEB1, and ZEB2-EMT-related transcription factors increased significantly. Although the N-terminally deleted mutant LEF-1 cannot interact with beta-catenin, it retained the ability to induce EMT. Consistent with these observations, neither the expression of a dominant negative beta-catenin/engrailed chimera, nor the expression of a cytoplasmic domain of E-cadherin that sequesters beta-catenin from binding to LEF/TCF, reversed LEF-1-induced EMT. Together, these data indicated that the nuclear function of beta-catenin was not necessary for the induction of Slug, ZEB1, and ZEB2 expression leading to EMT. (C) 2013 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据