Figure 2: Effects of Yupingfeng powder on colonic inflammation in trinitrobenzene sulfonic-induced colitis. (a) The representative histological changes of distal colon tissue from (a1) normal mice; (a2) trinitrobenzene sulfonic-induced colitis mice; (a3) sulfasalazine-treated mice; and (a4) high dose; (a5) median dose; (a6) low dose Yupingfeng powder-treated mice (H and E, scale bar, 200 µm). Statistical analysis of the pathological score and myeloperoxidase activity (b and c, respectively). Data are presented as a mean ± standard error of the mean, n = 10 per group. *P < 0.01 versus normal mice, *P < 0.05, **P < 0.01 versus trinitrobenzene sulfonic-induced colitis mice