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• W1969938493 abstract "We have developed a model system for studying integrin regulation of mammalian epithelial tubule formation. Application of collagen gel overlays to Madin-Darby canine kidney (MDCK) cells induced coordinated disassembly of junctional complexes that was accompanied by lamellipodia formation and cell rearrangement (termed epithelial remodeling). In this study, we present evidence that the Rho signal transduction pathway regulates epithelial remodeling and tubule formation. Incubation of MDCK cells with collagen gel overlays facilitated formation of migrating lamellipodia with membrane-associated actin. Inhibitors of myosin II and actin prevented lamellipodia formation, which suggests that actomyosin function was involved in regulation of epithelial remodeling. To determine this, changes in myosin II distribution, function, and phosphorylation were studied during epithelial tubule biogenesis. Myosin II colocalized with actin at the leading edge of lamellipodia thereby providing evidence that myosin is important in epithelial remodeling. This possibility is supported by observations that inhibition of Rho kinase, a regulator of myosin II function, alters formation of lamellipodia and results in attenuated epithelial tubule development. These data and those demonstrating myosin regulatory light-chain phosphorylation at the leading edge of lamellipodia strongly suggest that Rho kinase and myosin II are important modulators of epithelial remodeling. They support a hypothesis that the Rho signal transduction pathway plays a significant role in regulation of epithelial tubule formation." @default.
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• W1969938493 date "2004-04-01" @default.
• W1969938493 modified "2023-10-17" @default.
• W1969938493 title "Modulation of epithelial tubule formation by Rho kinase" @default.
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• W1969938493 doi "https://doi.org/10.1152/ajpcell.00246.2003" @default.
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