| First Author | Roura S | Year | 2004 |
| Journal | Biochem Biophys Res Commun | Volume | 320 |
| Issue | 2 | Pages | 435-41 |
| PubMed ID | 15219847 | Mgi Jnum | J:92202 |
| Mgi Id | MGI:3051943 | Doi | 10.1016/j.bbrc.2004.05.186 |
| Citation | Roura S, et al. (2004) Inducible expression of p120Cas1B isoform corroborates the role for p120-catenin as a positive regulator of E-cadherin function in intestinal cancer cells. Biochem Biophys Res Commun 320(2):435-41 |
| abstractText | Over the past decade, the exact function of p120-catenin in regulation of E-cadherin/catenins complex has remained particularly controversial. We have previously reported that E-cadherin-mediated adhesion is tightly regulated by tyrosine phosphorylation of catenins. However, this effect is not observed in human colon carcinoma cell line Caco-2. Here, we have generated inducible Caco-2 clones that display p120Cas1B, a p120-catenin isoform poorly expressed by these cells. As a result, neither expression of the transgene nor tyrosine phosphorylation of catenins induces redistribution of E-cadherin to the cytosol and disassembly of adherens and tight junctions. In contrast, E-cadherin appears markedly increased reinforcing cell-cell adhesion. Interestingly, a substantial decrease in p120-catenin levels is found in MDCK cells expressing Snail, in which E-cadherin expression is strongly inhibited. Additionally, we show that the specific depletion of p120-catenin decreases cell-cell contacts, and increases cell motility and scattering of colonies established by HT-29 M6 cells. Together our results corroborate that p120-catenin plays an essential role in the maintenance of the required E-cadherin protein levels that prevent the loss of epithelial characteristics occurred during tumorigenesis. |
