Fig. 3: URB597 combined with RSL3 significantly inhibits the growth of RCC cells by inducing ferroptosis and cell cycle arrest.

Level of lipid peroxidation (A), MDA (B), 4-HNE (C), and cytosolic ROS production (D) in 786-O and Caki-1 cells treated with URB597 (10 µM) and RSL3 (0.5 µM) singly or in combination for 48 h. Lipid peroxidation and cytosolic ROS were assessed by flow cytometry with C11-BODIPY and H2DCFDA, respectively. Histograms show the production of MDA, the production of 4-HNE, and the relative fold change in lipid ROS and cytosolic ROS (right panel). E Cell cycle distributions of 786-O and Caki-1 cells treated as in (A). The cell cycle was evaluated by flow cytometry after staining with propidium iodide (PI). Histograms show the cell cycle distributions of treated 786-O and Caki-1 cells (right). Data are means ± SDs of measurements repeated three times with similar results. **p < 0.01 versus the corresponding control (t test).