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Subcellular distribution and expression of cofilin and ezrin in human colon adenocarcinoma cell lines with different metastatic potential

D. Nowak, A. J. Mazur, A. Popow-Woźniak, A. Radwańska, H. G. Mannherz, M. Malicka-Błaszkiewicz

Authors information
  • D. Nowak
    Dept. of Cell Pathology, Faculty of Biotechnology, University of Wroclaw, Poland, Poland. dorotan@ibmb.uni.wroc.pl
  • A. J. Mazur
    Department of Cell Pathology, Faculty of Biotechnology, University of Wroc?aw and Department of Anatomy and Embryology, Ruhr-University, .
  • A. Popow-Woźniak
    Department of Cell Pathology, Faculty of Biotechnology, University of Wroc?aw, Poland.
  • A. Radwańska
    Department of Cell Pathology, Faculty of Biotechnology, University of Wroc?aw, Poland.
  • H. G. Mannherz
    Department of Anatomy and Embryology, Ruhr-University, Germany.
  • M. Malicka-Błaszkiewicz
    Department of Cell Pathology, Faculty of Biotechnology, University of Wroc?aw, Poland.

Abstract


The dynamic reorganization of the actin cytoskeleton is regulated by a number of actin binding proteins (ABPs). Four human colon adenocarcinoma cell lines – parental and three selected sublines, which differ in motility and metastatic potential, were used to investigate the expression level and subcellular localization of selected ABPs. Our interest was focused on cofilin and ezrin. These proteins are essential for cell migration and adhesion. The data received for the three more motile adenocarcinoma sublines (EB3, 3LNLN, 5W) were compared with those obtained for the parental LS180 adenocarcinoma cells and fibroblastic NRK cells. Quantitative densitometric analysis and confocal fluorescence microscopy were used to examine the expression levels and subcellular distribution of the selected ABPs. Our data show distinct increase in the level of cofilin in adenocarcinoma cells accompanied by the reduction of inactive phosphorylated form of cofilin. In more motile cells, cofilin was accumulated at cellular periphery in co-localization with actin filaments. Furthemore, we indicated translocation of ezrin towards the cell periphery within more motile cells in comparison with NRK and parental adenocarcinoma cells. In summary, our data indicate the correlation between migration ability of selected human colon adenocarcinoma sublines and subcellular distribution as well as the level of cofilin and ezrin. Therefore these proteins might be essential for the higher migratory activity of invasive tumor cells.

Keywords


Actin; Actin Binding Proteins; Cytoskeleton

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Submitted: 2009-12-28 13:03:08
Published: 2010-04-13 15:28:02
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The European Journal of Histochemistry [eISSN 2038-8306] is an Open Access, peer-reviewed journal published by PAGEPress®, Pavia, Italy. All credits and honors to PKP for their OJS.
 
 
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