Effects of co-treatment on the expression of the mRNA in T47D-KBluc cells cultured in cs-FBS-supplemented medium. Results are expressed as (N-fold difference in target gene expression relative to GAPDH gene expression). E2, 0.1 μM 17β-estradiol; E2+I, 0.1 μM 17β-estradiol with 1 μM ICI 182 780; E2+N, 0.1 μM 17β-estradiol with 5 μM naringenin; Gen 5 μM genistein; G+I, 5 μM genistein with 1 μM ICI 182 780; G+N, 5 μM genistein with 5 μM naringenin; NAR, 5 μM naringenin; N+I, 5 μM naringenin with 1 μM ICI 182 780; ICI, 1 μM ICI 182 780; CONT, control.