Figure 2. Effects of 80 % EtOH extracts of H. radicata flower (HRF) or T. platycarpum flower (TRF) on NO and PGE2 production, and on cytotoxicity in LPS-stimulated RAW 264.7 cells. Cells (1.8 × 105 cells/mL) were pre-incubated for 18 h, and then stimulated with LPS (1 µg/mL) for 24 h in the presence of each of the 80 % EtOH extracts (100, 200, or 400 µg/mL), 2-amino (10 µM 2-amino-4-methylpyridine), or dex (20 µM dexamethasone). (A) NO and (B) PGE2 production levels. Data are presented as means ± S.D. of three independent experiments. *p < 0.05; **p < 0.01 compared to positive control.
