GFAP and colitis: ES 50 mg/kg (11.75 ± 2.02) and Au@ES 50 mg/kg (8.53 ± 1.45), as well as dexamethasone (7.71 ± 1.41), decreased the labeling (p < 0.05) when compared to the colitis group, in terms of GFAP-positive cells per field.