NF-κB activation in A2780 (A) and C200 (B) human ovarian cancer cells. Supershift assay (C) showed the formation of bigger complex after addition of anti-NF-κB p65 antibody, resulting in the shift of NF-κB band. Cells untreated or treated with 10 or 25 μM genistein (Gen), 250 nM cisplatin (Cis), the combination (Gen + Cis), 1 or 2 nM taxotere (Tax), the combination (Gen + Tax), 2 or 50 nM gemcitabine (Gem) and the combination (Gen + Gem). Retinoblastoma antibodies were used as internal controls for nuclear protein loading as control. Significant inactivation of NF-κB was observed in A2780 and C200 cells treated with the combination of genistein and either cisplatin, gemcitabine or taxotere compared to cells treated with either drug alone.