Figure 5. Effects of combination therapy on p21 expression in vivo and in vitro.
(A) Immunohistochemistry (IHC) staining for p21 in tumor xenograft tissues. Mice were treated with placebo or combination therapy (Gefitinib 2 mg/day, 5 times per week and DIM-C 60 mg/Kg, 3 times per week). Graphic on the right side represents quantification of positive staining cells. (B) In vitro expression of p21 in Western blot of lysate cells treated with gefitinib 5 µM and DIM-C 3 µM for 24 hs. Graphic on the right side, represents quantification of p21 expression related to GAPDH.