The protocols herein described provide a guide to visualize and quantify the activity of neutrophil proteases in human sputum. The applications of such analysis span from the evaluation of anti-inflammatory treatments, to biomarker validation, drug screening and large cohort clinical studies.
Frey, D. L., Guerra, M., Mall, M. A., Schultz, C. Monitoring Neutrophil Elastase and Cathepsin G Activity in Human Sputum Samples. J. Vis. Exp. (171), e62193, doi:10.3791/62193 (2021).