"Figure 4 shows the inhibitory effect of gefitinib on EGFinduced autophosphorylation of EGFR, and phophorylation of Akt and ERK1/2 in three of the NSCLC cell lines. EGF stimulated EGFR autophosphorylation and activation of Akt and ERK1/2 in PC9 (A), A549 (B), and QG56 (C) cells, and activation was blocked to different extents by gefitinib."
"Western blotting with the anti-phospho-Akt1 antibody, which recognizes only phosphorylated Ser-473 residue, was performed in human esophageal cancer cell lines (TE-2, TE-5, TE-8, TE-9, TE-10, and TE-12 cells) (top panel). PDGF-treated NIH3T3 cells served as a positive control. The phospho-Akt antibody demonstrated two bands at 60 kDa. The phosphorylation of Akt was enhanced by EGF stimulation in all the esophageal cancer cell lines examined, although TE-5 cells showed high basal phosphorylation of Akt."