Figure 5. ER-α36 disruptor Broussoflavonol B restores TAM sensitivity.
A. Western blot analysis of the expression of ER-α36, ER-α66, EGFR and HER2, and levels of EGFR and HER2 phosphorylation in parental MCF7 (MCF7/P) and MCF7/TAM cells treated with indicated concentrations of Broussoflavonol B (BB) for 12 hours. B. Cells were treated with indicated concentrations of tamoxifen (TAM) together with vehicle or 1 µM of Broussoflavonol B (BB) for seven days and the numbers of survived cells were counted. The columns represent the means of three experiments; bars, SE. *, P<0.05 for MCF/TAM cells treated with vehicle vs cells treated with 1 µM of tamoxifen and BB.