Used in biomedical research to quantify levels of human polymorphonuclear leukocyte elastase in biological samples such as serum, plasma, or tissue homogenates. This ELISA kit helps assess neutrophil activation and degranulation, which are critical in inflammatory processes. Commonly applied in studies of chronic inflammatory diseases like COPD, cystic fibrosis, rheumatoid arthritis, and acute lung injury. Enables researchers to evaluate the effectiveness of anti-inflammatory or anti-elastase compounds in experimental models. Also used in clinical research to investigate the role of elastase in infection, sepsis, and tissue remodeling.