Figure 2: Concentration-dependent effects of Russula virescens (RVE) on NO production and iNOS protein in RAW 267.4 cells. The cells were left untreated or treated with LPS (1 g/ml) and RVE (0.5- 5.0 mg/ml) for 24 h, and the production of NO was evaluated by Griess reaction. Lysates were prepared from control or stimulated cells treated for 24 h with LPS (1 g/ml) alone or in combination with increasing concentrations (0.5- 5.0 mg/ml) of RVE. The experiment was repeated three times with similar results.