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| Content Provider | PubMed Central |
|---|---|
| Author | Wang, Zezhou Sandiford, Shelley Wu, Chenggang Li, Shawn Shun-cheng |
| Copyright Year | 2009 |
| Abstract | Epithelial-mesenchymal transition (EMT), which can be caused by aberrant tyrosine kinase signalling, marks epithelial tumour progression and metastasis, yet the underlying molecular mechanism is not fully understood. Here, we report that Numb interacts with E-cadherin (E-cad) through its phosphotyrosine-binding domain (PTB) and thereby regulates the localization of E-cad to the lateral domain of epithelial cell–cell junction. Moreover, Numb engages the polarity complex Par3–aPKC–Par6 by binding to Par3 in polarized Madin-Darby canine kidney cells. Intriguingly, after Src activation or hepatocyte growth factor (HGF) treatment, Numb decouples from E-cad and Par3 and associates preferably with aPKC–Par6. Binding of Numb to aPKC is necessary for sequestering the latter in the cytosol during HGF-induced EMT. Knockdown of Numb by small hairpin RNA caused a basolateral-to-apicolateral translocation of E-cad and β-catenin accompanied by elevated actin polymerization, accumulation of Par3 and aPKC in the nucleus, an enhanced sensitivity to HGF-induced cell scattering, a decrease in cell–cell adhesion, and an increase in cell migration. Our work identifies Numb as an important regulator of epithelial polarity and cell–cell adhesion and a sensor of HGF signalling or Src activity during EMT. |
| Related Links | http://dx.doi.org/10.1038/emboj.2009.190 |
| Ending Page | 2373 |
| Page Count | 14 |
| Starting Page | 2360 |
| File Format | |
| ISSN | 02614189 |
| e-ISSN | 14602075 |
| Journal | The EMBO Journal |
| Issue Number | 16 |
| Volume Number | 28 |
| Language | English |
| Publisher | Nature Publishing Group |
| Publisher Date | 2009-07-01 |
| Access Restriction | Open |
| Rights Holder | Nature Publishing Group |
| Subject Keyword | Biochemistry, Genetics and Molecular Biology(all) Immunology and Microbiology(all) Neuroscience(all) Molecular Biology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Immunology and Microbiology Medicine Molecular Biology |
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