Primary human keratinocytes control (a) or stimulated with either 30 mM LiCl (b), 1 μM Dex (c) or 100 nM Dex-BSA (f) for 24 hours in presence of 1 μM Ru486 (d and g) or 0.2 μM CC (e and h) are shown. Presence of phospho-β-catenin (Y142) was visualized by immunofluorescence (green; left panels). Nuclei were visualized by staining with PI (red; middle panels) and relative nuclearization was assessed by merging the two images using ImageJ (with co-localization appearing yellow; right panels). CC, calphostin C; Dex, dexamethasone; Dex-BSA, BSA-conjugated dexamethasone; GC, glucocorticoid; LiCl, lithium chloride; PI, propidium iodide; PKC, protein kinase C. Scale bar = 50 μm.