TSLP and asthma: T2-high asthma involves T helper 2 (Th2) cells, eosinophils/basophils, and group 2 innate lymphoid cells (ILC2), in conjunction with epithelial cell-derived cytokines, such as interleukin (IL)-25, IL-33, and thymic stromal lymphopoietin (TSLP), leading to allergic sensitization and airway inflammation sustained by IgE, IL-4, IL-5, and IL-13 [54].