Abstract
Besides the major players IL-4, IL-13, IL-5, and IgE as targets for biologics, other mediators have been identified that are secreted by epithelial cells and act upstream in the cascade of allergic inflammation. Such are the alarmin IL-33 as well as TSLP and IL-5. The role of each cytokine in sensitization and effector phase of allergic inflammation and how development of biologics is ongoing in order to inhibit this pathomechanism will be described in the following article.