Effect of Scutellariae radix on 2,4,6-trinitrobenzene sulfonic acid-induced oxidant stress in ulcerative colitis rats. (a) The effect of Scutellariae radix on 2,4,6-trinitrobenzene sulfonic acid-induced catalase activity; (b) the effect of Scutellariae radix on 2,4,6-trinitrobenzene sulfonic acid-induced glutathione peroxidase activity; (c) the effect of Scutellariae radix on 2,4,6-trinitrobenzene sulfonic acid-induced superoxide dismutase activity; (d) the effect of Scutellariae radix on 2,4,6-trinitrobenzene sulfonic acid-induced malondialdehyde content. &&&P < 0.001 and &&P < 0.01, model group versus control group; **P < 0.01, mesalazine versus model group; ###P < 0.001, ##P < 0.01, and #P < 0.05 Scutellariae radix versus model group. Data from individual experiments are presented as means ± standard deviation (n = 6)