Effects of GDC-0068-based CRBN-recruiting compounds on degrading AKT and inhibiting downstream signaling. BT474 cells were treated with GDC-0068 (1 μM), VHL-1 (1 μM), POM (1 μM), or indicated compounds at 1, 5, and 10 μM for 24 h. The cell lysates were analyzed by western blotting to examine the protein levels of T-AKT, P-AKT (S473), P-PRAS40, (T246) and P-S6 (S240/244). β-Actin was used as the loading control.