Figure 3. Depletion of GSTT1 inactivates the p38–MK2 signaling pathway. KGN cells (wild–type, ΔLamin ΔGSTT1 or Δp38α cells) were treated with or without H2O2 at 200 μM for 24 h before investigation of the expression of GSTT1 and activation of p38 and MK2 by immunofluorescence analysis (A). The primary antibodies against GSTT1, phosphorylated p38 and phosphorylated MK2 were probed with anti-rabbit IgG–Alexa488 (Green). Cells were counterstained with Hoechst 33342 at 10 μM (Blue). Magnification: ×200. Bar graphs represent the mean fluorescence intensity per cell ± SEM (B). One–way ANOVA: (B, GSTT1) P < 0.001, (B, p-p38) P < 0.05, (B, p-MK2) P < 0.001.