CAT and infection: The Nrf2-ARE signaling pathway is a crucial antioxidant signaling pathway that can activate downstream phase II antioxidant enzymes such as HO-1, SOD, Trx, catalase, NADPH: quinine oxidoreductase (NQO1), and glutathione peroxidase, among others, to maintain healthy function when under oxidative stress in cases like hypoxia, infection, inflammation, or injuries.