Used in biomedical research to quantify soluble interleukin-1 receptor levels in biological samples such as serum, plasma, or cell culture supernatants. Helps in studying inflammatory processes, immune responses, and diseases like rheumatoid arthritis, sepsis, and autoimmune disorders. Enables researchers to assess the modulation of interleukin-1 activity, which plays a key role in inflammation and host defense. Widely applied in preclinical studies, clinical diagnostics development, and therapeutic monitoring where inflammation is a contributing factor.