Abstract
Ets-1 is the prototype of the family of ETS transcription factors. In human tumors, Ets-1 is expressed in endothelial cells and fibroblasts of the tumor stroma and is proposed to play a role in tumor vascularization and invasion by upregulating expression of matrix-degrading proteases. In human carcinomas, Ets-1 is also expressed by neoplastic cells, but little is known about the functional implications of this observation. We have addressed the role of Ets-1 in epithelial HeLa tumor cells by selecting stably Ets-1 over and underexpressing HeLa cells. Ets-1 expression increases the transformed phenotype of HeLa cells, by promoting cell migration, invasion and anchorage-independent growth, while Ets-1 downregulation reduces cell attachment. In correlation with these results, Ets-1 upregulation increases integrinβ2 expression but not that of other integrins. These results suggest that, in addition to its role in the tumor stroma, Ets-1 may also promote tumor development and progression by increasing neoplastic transformation.
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Acknowledgements
We are indebted to Dr Hiroyasu Esumi (National Cancer Center Research Institute East, Kashiwa, Chiba/Japan) for providing plasmids. This work has been supported by German Cancer Association (‘Deutsche Krebshilfe’ Grant no. 10-1610-We2) and DFG (‘Deutsche Forschungsgemeinschaft’ Grant no. We 1104/8-1).
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Hahne, J., Okuducu, A., Kaminski, A. et al. Ets-1 expression promotes epithelial cell transformation by inducing migration, invasion and anchorage-independent growth. Oncogene 24, 5384–5388 (2005). https://doi.org/10.1038/sj.onc.1208761
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DOI: https://doi.org/10.1038/sj.onc.1208761
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