Abstract
Malignant cell transformation requires changes in the ability of cells to migrate. The disruption of actin cytoskeleton and intercellular adhesions is an important component of the acquisition of invasive properties in epithelial malignancies. The invasive ability of carcinoma cells is associated with reduced expression of adhesion junction molecules and increased expression of mesenchymal markers, frequently referred to as epithelial-to-mesenchymal transition (EMT). Standard features of the EMT program in cancer cells include fibroblastic phenotype, downregulation of the epithelial marker E-cadherin, induction of Snail-family transcription factors, as well as expression of mesenchymal proteins. We compared the epithelial and mesenchymal marker profiles of nonmalignant HaCaT keratinocytes to the corresponding profiles of cervical carcinoma cell lines C-33A, SiHa, and CaSki. The characteristics of the EMT appeared to be more developed in SiHa and CaSki cervical cancer cells. Further activation of the EMT program in cancer cells was induced by epidermal growth factor. Decreased epithelial marker E-cadherin in CaSki cells was accompanied by increased mesenchymal markers N-cadherin and vimentin. Downregulated expression of E-cadherin in SiHa and CaSki cells was associated with increased expression of Snail transcription factor. Our goal was to study actin reorganization in the EMT process in cell cultures and in tissue. We found that β-cytoplasmic actin structures are disorganized in the cervical cancer cells. The expression of β-cytoplasmic actin was downregulated.
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Abbreviations
- EGF:
-
epidermal growth factor
- EMT:
-
epithelial-to-mesenchymal transition
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Original Russian Text © G. S. Shagieva, L. V. Domnina, T. A. Chipysheva, V. D. Ermilova, C. Chaponnier, V. B. Dugina, 2012, published in Biokhimiya, 2012, Vol. 77, No. 11, pp. 1513–1525.
Originally published in Biochemistry (Moscow) On-Line Papers in Press, as Manuscript BM12-154, October 7, 2012.
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Shagieva, G.S., Domnina, L.V., Chipysheva, T.A. et al. Actin isoforms and reorganization of adhesion junctions in epithelial-to-mesenchymal transition of cervical carcinoma cells. Biochemistry Moscow 77, 1266–1276 (2012). https://doi.org/10.1134/S0006297912110053
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DOI: https://doi.org/10.1134/S0006297912110053