Described herein are methods and compositions for treatment of immune-related diseases or disorders and/or therapy monitoring based on the level of TIGIT, Flg2 and/or IL-33 expression and/or activity. In some embodiments, the methods and compositions described herein are directed to treatment and/or therapy monitoring of cancer and/or infections (e.g., chronic viral infection, intracellular and/or extracellular bacterial infection, and/or fungal infection). In some embodiments, the methods and compositions described herein are directed to treatment and/or therapy monitoring of autoimmune diseases and/or inflammation (e.g., caused by parasitic infection). In some embodiments, the methods and compositions described herein are directed to treatment and/or therapy monitoring of asthma, allergy, and/or atopy. Methods for identifying patients who are more likely to be responsive to and benefit from an immunotherapy that targets TIGIT, Fg12 and/or IL-33 are also described herein.
