Cell permeable Rho inhibitor disrupts stress fibers and can be manipulated to induce either moderate or robust phenotypes. Swiss 3T3 fibroblasts plated on coverslips were untreated (A) or treated with 2.0 µg/ml of CT04 for 2 h (B) or 4 h (C) at 37°C. Cell were then fixed, stained with Rhodamine-labeled Phalloidin (Cat. # BK005), and visualized by flu orescence microscopy. Images were taken at a magnification of 20×. The untreated control cells in A were well spread and stress fibers were present. The cells treated for 2 h in B displayed a Moderate Phenotype, characterized by a loss of stress fibers, cells remaining well spread, and a 10-40% decrease in Rho activity (also see Figure 2). Treatment for 4 h (C) yielded a Robust Phenotype, characterized by a loss of stress fibers, decreased cell spreading, collapse of the cell body, protrusion of dentritic extensions, and a >50% decrease in Rho activity (also see Figure 2).
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