CAT and colitis: The aim of this work was to evaluate the potential protective effect of OZO in 2,4-dinitrobenzene sulphuric acid (DNBS) induced colitis in rats as well as elucidate the role of some important constituents of antioxidant defense system such as superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) in these possible effects.