Fig. 1. Inhibition of nitric oxide production measured as nitrite in the cell free culture supernatants of LPS (1 lg/ml) challenged RAW 264.7 murine macrophages. NO concentration in the culture supernatant was determined by Griess assay using sodium nitrite standard curve. Data are presented as means ± SD from three sets of independent experiments. * p< 0.05 represent significant difference compared with cells treated with LPS alone. a p < 0.05 represent significant difference compared with control group.