DUOX2 and DUOXA2 Form the Predominant Enzyme System Capable of Producing the Reactive Oxygen Species H2O2 in Active Ulcerative Colitis and are Modulated by 5-Aminosalicylic Acid

Abstract

Both DUOX2 and DUOXA2 expression are involved specifically in inflammation and are regulated on a crypt-by-crypt basis in ulcerative colitis tissues. Synergy between inflammation, hypoxia, and 5-ASA to increase H2O2 production could explain how 5-ASA supports innate defense, although potentially increasing the burden of DNA damage.