Used in biomedical research to quantify levels of soluble interleukin-1 receptor II in biological samples such as serum, plasma, or cell culture supernatants. This kit helps study the regulation of inflammatory responses, as IL-1sRⅡ acts as a natural inhibitor of interleukin-1 signaling. It is commonly applied in immunology and inflammation-related studies, including autoimmune diseases, sepsis, and chronic inflammatory conditions. The assay enables researchers to monitor disease progression, evaluate therapeutic interventions, and understand immune modulation mechanisms.