AZD8055 effect on growth of ER- acquired fulvestrant-resistant MCF7 (FasR) and T47D cells (T47D-fasR). FasR (A) and T47D-fasR (B) cells were grown for seven days in the presence of AZD8055 (0 to 100 nM) and cell number determined by Coulter counting. Results expressed as% control. **P <0.01, ***P <0. 001.