Figure 2.
The ER antagonist ICI 182780 specifically blocks the induction of luciferase activity by JP-M through ERα in MCF-7 cells transiently transfected with a pERE-luciferase plasmid. Cells were treated with 10 nM E2 or 10 nM E2 + 1 µM ICI 182780 or 20 µg/ml JP-M or 20 µg/ml JP-M + 1 µM ICI 182780 to assess induction. Relative luciferase units were measured by luminometer. Results are expressed as fold induction above control (vehicle solvent). Abbreviations: E2 = 17β-estradiol; JP-M = Justicia pectoralis; ICI = ICI 182,780. Data represent the mean ± SD of three separate experiments performed in triplicate.