Fig. 4.

Effect of isolated compounds (30 µM) on NF-κB activity in HEK-293/NF-κB-luc cells; negative control: cells were treated which solvent vehicle (DMSO, 0.1%) and stimulated with TNF-α; positive control: cells were treated with parthenolide (5 µM) and stimulated with TNF-α. For compound assignment see Fig. 1. Data points represent mean±S.E.M.; n=3, ^⁎p<0.05 (ANOVA/Tukey) compared with negative control.