Fig. 7: Decision-making workflow for selecting treatment for newly diagnosed ER+/HER2- metastatic breast cancer patients.

Phosphoproteomic-based quantification of PI3K/AKT/mTOR activity in tumor samples using the LCM/RPPA workflow allows to identify patients with high pathway activation that may benefit from the addition of a PI3K inhibitor to sensitize resistant tumors to ET in combination with CDK4/6 inhibition.