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Caldesmon (CaD), a protein component of the actomyosin filament apparatus, modulates cell shape and cytoskeletal structure when overexpressed. When capillary endothelial cells were infected with an adenoviral vector encoding GFP-CaD under Tet-Off control, progressive inhibition of contractility, loss of actin stress fibers, disassembly of focal adhesions, and cell retraction resulted. This was accompanied...
Cell spreading on extracellular matrix and associated changes in the actin cytoskeleton (CSK) are necessary for progression through G1 and entry into S phase of the cell cycle. Pharmacological disruption of CSK integrity inhibits early mitogenic signaling to the extracellular signal-regulated kinase (Erk) subfamily of the mitogen-activated protein kinases (MAPKs) and arrests the cell cycle in G1....
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