MPO and ulcer disease: In all groups treated with ACAE and ACHE with the exception of ACAE (150 mg/kg), ulcer index and wet weight of colon as parameters of macroscopic injuries, total colitis index as marker of microscopic features and MPO activity were significantly reduced in comparison to the control group; however, MDA value was only diminished in ACAE (300 and 600 mg/kg) and ACHE (300 mg/kg) groups significantly.