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- W2800692603 abstract "The role of distinct actin filament architectures in epithelial plasticity remains incompletely understood. We therefore determined roles for formins and the Arp2/3 complex, which are actin nucleators generating unbranched and branched actin filaments, respectively, in the process of epithelial to mesenchymal transition (EMT). In clonal lung, mammary, and renal epithelial cells, the formin activity inhibitor SMIFH2 but not the Arp2/3 complex activity inhibitor CK666 blocked EMT induced by TGF-β. SMIFH2 prevented the proximal signal of increased Smad2 phosphorylation and hence also blocked downstream EMT markers, including actin filament remodeling, decreased expression of the adherens junction protein E-cadherin, and increased expression of the matrix protein fibronectin and the transcription factor Snail. The short hairpin RNA silencing of formins DIAPH1 and DIAPH3 but not other formins phenocopied SMIFH2 effects and inhibited Smad2 phosphorylation and changes in Snail and cadherin expression. Formin activity was not necessary for the cell surface expression or dimerization of TGF-β receptors, or for nuclear translocation of TAZ, a transcription cofactor in Hippo signaling also regulated by TGF-β. Our findings reveal a previously unrecognized role for formin-dependent actin architectures in proximal TGF-β signaling that is necessary for Smad2 phosphorylation but not for cross-talk to TAZ." @default.
- W2800692603 created "2018-05-17" @default.
- W2800692603 creator A5030671284 @default.
- W2800692603 creator A5034737583 @default.
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- W2800692603 date "2018-06-15" @default.
- W2800692603 modified "2023-10-16" @default.
- W2800692603 title "Formin-dependent TGF-β signaling for epithelial to mesenchymal transition" @default.
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- W2800692603 doi "https://doi.org/10.1091/mbc.e17-05-0325" @default.
- W2800692603 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6014098" @default.
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