1. Overexpression of lumican affects the migration of human colon cancer cells through up-regulation of gelsolin and filamentous actin reorganization
- Author
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Agata Radwanska, François-Xavier Maquart, Dorota Nowak, Maria Malicka-Błaszkiewicz, Monika Litwin, Yanusz Wegrowski, Dagmara Baczynska, Matrice extracellulaire et dynamique cellulaire - UMR 7369 (MEDyC), Université de Reims Champagne-Ardenne (URCA)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), and Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Lumican ,macromolecular substances ,Transfection ,Filamentous actin ,Actin cytoskeleton organization ,03 medical and health sciences ,0302 clinical medicine ,Cell Movement ,Cell Line, Tumor ,Humans ,Cytoskeleton ,Gelsolin ,ComputingMilieux_MISCELLANEOUS ,030304 developmental biology ,0303 health sciences ,biology ,Cell migration ,Cell Biology ,Vinculin ,Actin cytoskeleton ,Molecular biology ,Actins ,Up-Regulation ,Cell biology ,Actin Cytoskeleton ,Chondroitin Sulfate Proteoglycans ,Keratan Sulfate ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,biology.protein - Abstract
Cell migration is a multistep process initiated by extracellular matrix components that leads to cytoskeletal changes and formation of different protrusive structures at the cell periphery. Lumican, a small extracellular matrix leucine-rich proteoglycan, has been shown to inhibit human melanoma cell migration by binding to α2β1 integrin and affecting actin cytoskeleton organization. The aim of this study was to determine the effect of lumican overexpression on the migration ability of human colon adenocarcinoma LS180 cells. The cells stably transfected with plasmid containing lumican cDNA were characterized by the increased chemotactic migration measured on Transwell filters. Lumican-overexpressing cells presented the elevated filamentous to monomeric actin ratio and gelsolin up-regulation. This was accompanied by a distinct cytoskeletal actin rearrangement and gelsolin subcellular relocation, as observed under laser scaning confocal microscope. Moreover, LS180 cells overexpressing lumican tend to form podosome-like structures as indicated by vinculin redistribution and its colocalization with gelsolin and actin at the submembrane region of the cells. In conclusion, the elevated level of lumican secretion to extracellular space leads to actin cytoskeletal remodeling followed by an increase in migration capacity of human colon LS180 cells. These data suggest that lumican expression and its presence in ECM has an impact on colon cancer cells motility and may modulate invasiveness of colon cancer.
- Published
- 2012
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