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• W2049203498 startingPage "50" @default.
• W2049203498 abstract "Neoplastic transformation of fibroblasts results in widely different cell morphologies. We have attempted to correlate cell morphology with cytoskeletal organization and fibronectin expression in murine and avian fibroblasts transformed by a diverse group of viral and chemical agents. The distribution of vinculin, alpha-actinin, actin, and surface fibronectin was studied, and, where appropriate, also the extent of phosphotyrosine modification of vinculin. Irrespective of the transforming agent we found that increased cell rounding was generally correlated with a reduction in vinculin-containing focal adhesions, a dissolution of microfilament bundles, and a reduction of extracellular fibronectin. In contrast, spindle-shaped fibroblasts expressed relatively high levels of surface fibronectin. Reorganization of vinculin, actin, and alpha-actinin into rosette-like structures was observed in polygonal or rounded cells transformed by viruses encoding tyrosine kinases, but was not seen in fibroblasts transformed by agents without associated tyrosine kinase activity or in spindle-shaped cells. No correlation was found between the extent of phosphotyrosine modification of vinculin and the extent of cell rounding. Irrespective of cell morphology, the extent of tyrosine phosphorylation of vinculin was high in all cells transformed by viruses carrying the src gene, but low in those transformed by viruses expressing the fps gene. Our results indicate that the morphology of a transformed cell is determined by a combination of several factors which are affected to different extents by different transforming agents." @default.
• W2049203498 created "2016-06-24" @default.
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• W2049203498 date "1986-05-01" @default.
• W2049203498 modified "2023-10-16" @default.
• W2049203498 title "Cytoskeletal organization, vinculin-phosphorylation, and fibronectin expression in transformed fibroblasts with different cell morphologies" @default.
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• W2049203498 doi "https://doi.org/10.1016/0042-6822(86)90103-0" @default.
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