Modulation of adhesion, spreading and cytoskeleton organization of 3T3 fibroblasts by sulfonic groups present on polymer surfaces.
The early phase of 3T3 fibroblast interaction with sulfonated styrene copolymer surfaces, of two sulfonic group densities and thus of differing wettability, was studied. The sulfonic groups present on copolymer surfaces affected the behaviour of cells, i.e. they stimulated cell adhesion, activated cell spreading and influenced cytoskeleton reorganization. The relative number of adhering cells correlated, while the number of spreading cells inversely correlated, with the surface density of sulfonic groups. Cell shape and the pattern of distribution of F-actin, alpha-actinin and vinculin in the interacting cells also depend on the surface density of sulfonic groups. On surfaces of high sulfonic group density, highly polarized cells were observed with F-actin bundles. On surfaces of low sulfonic group density, the cells spread with a square-like morphology with F-actin organized in stress fibres. In contrast, the cells spread poorly on nonsulfonated surfaces and cell adhesion was unaffected by surface wettability. The contribution of alpha(5)beta(1), alpha(4), and beta(5)integrins to the cell interaction with fibronectin (FN) and vitronectin (VN) adsorbed from serum-containing medium on polymer surfaces was examined. Our results suggest that surface sulfonic groups influence the conformation of FN and VN adsorbed on polymer surfaces and, in turn, determine the integrins that are involved in cell adhesion.
Kowalczyńska
Hanna M
HM
Department of Biophysics and Biomathematics, Medical Centre for Postgraduate Education, ul Marymoncka 99, 01-813 Warsaw, Poland. hmkowal@smkp.edu.pl
Nowak-Wyrzykowska
Małgorzata
M
D016475:3T3 Cells; D000185:Actinin / Q000378:metabolism; D000818:Animals; D000911:Antibodies, Monoclonal / Q000494:pharmacology; D002448:Cell Adhesion / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D048429:Cell Size / Q000187:drug effects; D003599:Cytoskeleton / Q000502:physiology*; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects / Q000502:physiology*; D005353:Fibronectins / Q000378:metabolism; D039441:Integrin alpha4 / Q000276:immunology / Q000378:metabolism; D039081:Integrin alpha5beta1 / Q000276:immunology / Q000378:metabolism; D039641:Integrin beta Chains / Q000276:immunology / Q000378:metabolism; D051379:Mice; D011137:Polystyrenes / Q000138:chemical synthesis / Q000494:pharmacology*; D013457:Sulfur Compounds / Q000737:chemistry / Q000494:pharmacology*; D014404:Tubulin / Q000378:metabolism; D016596:Vinculin / Q000378:metabolism
D000911:Antibodies, Monoclonal; D005353:Fibronectins; D039081:Integrin alpha5beta1; D039641:Integrin beta Chains; D011137:Polystyrenes; D013457:Sulfur Compounds; D014404:Tubulin; C084344:integrin beta5; D000185:Actinin; D016596:Vinculin; D039441:Integrin alpha4; C024075:styrofoam