CCL27 and colitis: Since its description in 2006 (Uhlig et al., 2006), the induction of colitis by injecting agonistic anti-CD40 antibody has become an important tool to assess ILC-driven acute colitis (Buonocore et al., 2010; Vonarbourg et al., 2010; Fuchs et al., 2013; Kim et al., 2013; Song et al., 2015).