Figure 3. Combination of curcumin with HHT induced apoptosis of lymphoma cells via the mitochondrial-mediated apoptosis pathway. Raji and U937 cells were treated with 5 ng/mL HHT or/and 10 μM curcumin for 72 h. (A) Intracellular ROS generation was measured by DCF fluorescence. (B) MMP loss was determined via JC-1 staining. (C) Bax, Bcl-2, cleaved caspase 3, and cleaved caspase 9 expression were measured in Raji cells using Western blotting. (D, E, F, G) Relative cellular Bax, Bcl-2, cleaved caspase 3, and cleaved caspase 9 expression normalized to β-actin. **P < 0.01 compared to control group; ##P < 0.01 compared to HHT group.