Anti-inflammatory activity of (−)-aptosimon isolated from Daphne genkwa in RAW264.7 cells

In the present study, we investigated that (−)-aptosimon, isolated from flower buds of Daphne genkwa, inhibited cyclooxygenase-2 (COX-2) and inducible nitric oxide (NO) synthase (iNOS) expression in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Similarly, (−)-aptosimon suppressed tumor necrosis factor (TNF)-α production. Our results clearly indicated that (−)-aptosimon inhibited LPS-induced nuclear factor-κB (NF-κB) activation, by preventing degradation of the inhibitor kappa B-alpha (IκB-α). (−)-Aptosimon also inhibited interleukin-4 (IL-4) and interleukin-13 (IL-13) production in ConA-induced splenocytes. In conclusion, the anti-inflammatory effects of (−)-aptosimon are attributed to the suppression of pro-inflammatory cytokines and mediators by blocking NF-κB activation. These data suggest that (−)-aptosimon as a potential therapeutic agent for inflammation-associated disorders.