Fig 7. Inhibition of PAK4 affects β-catenin Ser-675 phosphorylation.

A) U2OS cells were treated with an inhibitor to PAK4 (5 μM PF-3758309) or vehicle for 1h before fixation, and then immuno-stained for PAK4 and p120-catenin. B) U2OS cells were similarly treated as in (A), but immuno-stained for pSer-675 β-catenin and p120-catenin instead. C) U2OS cells were treated with an inhibitor to PKA (10 μM H-89) or 5 μM PF-3758309 for 1h before lysates were harvested and subjected to Western blotting. The PAK4 bands are marked by arrowheads. D) Band signal intensities of β-catenin pSer-675 against total β-catenin was obtained from Western blots in 3 independent experiments via analysis using ImageJ, averaged and plotted with standard error of mean. *P value < 0.05. Scale bar: 10μm.