TSLP (Thymic Stromal Lymphopoietin): TSLP is a cytokine that plays a key role in initiating allergic inflammation and regulating immune responses at the epithelial barrier. It acts on dendritic cells, promoting a Th2-biased immune response, which is central to the development of allergic diseases such as asthma, atopic dermatitis, and eosinophilic esophagitis. Research on TSLP focuses on its potential as a therapeutic target, with insights into its mechanisms offering opportunities for innovative treatments of these conditions.