IL2 and inflammatory bowel disease: Increasing functions of IL-2 have proven to be resistant to microorganism infection and regulation of Tregs growth, survival and activity (Ohkura et al. 2011), which play a role in IBD (Waidmann et al. 2002), cirrhosis (Bajaj et al. 2012), and itchy psoriasis (Reich and Szepietowski 2007).