Figure 3.

Representative blot of iNOS expression (a). Densitometric analysis of concentration-dependent effect of Yuccaol C (0.01–100 μM) on LPS-induced iNOS expression in J774.A1 macrophages (b). Yuccaol C was added 1 h before and simultaneously with LPS challenge. Values, mean ± s.e.m., are expressed as %inhibition of at least 6–9 independent experiments with 3 replicates each. Comparisons were made using one way ANOVA test. *P < 0.05, and **P < 0.01 [34]