ESR1 and breast cancer: We investigate the expression profile of 48 apoptotic and 35 oxidative gene markers after CHCP treatment in six different types of breast cancer cell lines including luminal A (ER+ PR+/−HER2−), luminal B (ER+PR+/−HER2+), (ER−PR−HER2+), basal-like: ER−PR−HER2− cells were tested with CHCP at different power settings and at 4 different incubation time.