IL33 (Interleukin 33): IL33 is a cytokine that belongs to the IL-1 family and functions as an alarm signal released by cells experiencing stress or injury. It binds to the ST2 receptor, initiating inflammatory responses, and plays a crucial role in conditions such as allergies, asthma, and other inflammatory diseases. Research on IL33 investigates its dual function in both promoting inflammation and offering protection, with potential implications for therapies targeting chronic inflammation and immune system dysregulation.