Used in research settings to quantify levels of human neutrophil elastase (HNE) in biological samples such as serum, plasma, sputum, and cell culture supernatants. This kit supports studies related to inflammatory diseases including chronic obstructive pulmonary disease (COPD), cystic fibrosis, acute respiratory distress syndrome (ARDS), and rheumatoid arthritis, where HNE plays a key role in tissue degradation and immune response. It enables researchers to monitor disease progression, evaluate the effectiveness of anti-inflammatory therapies, and investigate neutrophil activation in various pathological conditions. The assay is not intended for diagnostic use but serves as a tool for preclinical and translational research.