Research at Azcuris Co. Ltd. has led to the development of thymic stromal lymphopoietin (TSLP)/cytokine receptor-like factor 2 (CRLF2; TSLPR) interaction inhibitors, which are reported to be useful for the treatment of autoimmune diseases, chronic obstructive pulmonary disease (COPD), allergy, asthma, allergic rhinitis and chronic rhinosinusitis.