Abstract
The epithelial–mesenchymal transition (EMT) plays an important role in development and cancer progression. Upon EMT, epithelial cells lose stable cell–cell adhesions and reorganize their cytoskeleton to acquire migratory activity. Recent data demonstrated that EMT drives cancer cells from the epithelial state to a hybrid epithelial/mesenchymal phenotype with retention of some epithelial markers (in particular, E-cadherin), which is important for cancer cell dissemination. In vitro studies of the effect of growth factors (in particular, epidermal growth factor (EGF)) on cultured cells can be highly advantageous for understanding the details of the early stages of EMT. The methods described in this chapter are intended for studying intermediate phenotypes of EMT. Time-lapse DIC microscopy is used for visualization of changes in morphology and motility of the cells stimulated with EGF. The transwell migration assay allows the evaluation of the migratory activity of the cells. Studying of dynamics of a fluorescently labeled actin-binding protein F-tractin-tdTomato using confocal microscopy allows detection of EGF-induced changes in the organization of the actin cytoskeleton. Live-cell imaging of cells stably expressing GFP-E-cadherin visualizes reorganization of stable tangential E-cadherin-based adherens junctions (AJs) into unstable radial AJs during the early stages of EMT.
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Acknowledgment
This work was supported by the Russian Science Foundation (Grant 16-15-10288).
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Gloushankova, N.A., Rubtsova, S.N., Zhitnyak, I.Y. (2018). An In Vitro System to Study the Epithelial–Mesenchymal Transition In Vitro. In: Gautreau, A. (eds) Cell Migration. Methods in Molecular Biology, vol 1749. Humana, New York, NY. https://doi.org/10.1007/978-1-4939-7701-7_4
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DOI: https://doi.org/10.1007/978-1-4939-7701-7_4
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