Fig. 1.

Effect of HE2000 on nitric oxide production by RAW 264·7 cells. Cultures were stimulated with 100 ng/ml lipopolysaccharide in the presence or absence of serial dilutions of HE2000 (n ≥ 3 per culture condition). After 24 h, nitric oxide in the supernatants was determined using Griess reagent. Data are from one of three independent studies with similar results and are expressed as nitric oxide concentration ± standard deviation.