TNF-α inhibitory effects of the GWE. L929 cells were treated with indicated concentrations of GWE in the presences of 1 ng/mg TNF-α. After 24 h of treatment, cell viability was determined by MTT assays and TNF-α inhibitory effects of the test drugs were expressed as % inhibition = (O.D.ActD+TNF-α+test drugs – O.D.ActD+TNF-α)/(O.D.ActD – O.D.ActD+TNF-α). PC: Positive Control, 5 μg anti-TNF-α antibody. The values show are mean ± S.E.M. (\( n \) =6). **\( P \)< 0.001 compared with the normal control group.