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- W2074657684 abstract "To clarify the relationship between ruffling and lamellipod extension in growth factor-stimulated chemotactic responses, we utilized cell lines derived from the rat 13762 NF mammary adenocarcinoma. Nonmetastatic MTC cells expressing the human EGF receptor (termed MTC HER cells) demonstrated chemotactic responses to TGF-α, an EGF receptor ligand typically present in mammary tissue. In microchemotaxis chambers, peak chemotactic responses occurred in response to 5 nM TGF-α. MTC HER cells showed dramatic ruffling edges in the absence of external stimuli, and addition of 5 nM TGF-α led to a transient reduction in ruffling concomitant with lamellipod extension. Lamellipod extension correlated with an overall increase in actin polymerization. These responses were blocked by the PI 3 kinase inhibitor wortmannin but not by the MAP kinase inhibitors PD98059 and SB203580. We conclude that the initial chemotactic response to TGF-α involves lamellipod extension and that ruffling reflects a dynamic turnover of lamellipodia that is arrested during lamellipod extension. By regulating the dissolution of ruffles and extension of lamellipods, a chemotactic response can be achieved, which may contribute to the metastatic process." @default.
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- W2074657684 date "1998-07-01" @default.
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- W2074657684 title "Suppression of Ruffling by the EGF Receptor in Chemotactic Cells" @default.
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- W2074657684 doi "https://doi.org/10.1006/excr.1998.4093" @default.
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