The pathogenesis of many chronic non-communicable diseases (NCDs) is associated with chronic low-grade (low-intensity) inflammation. One of the most important mechanisms in the development of inflammation is the activation of the proteolysis system, which regulates biological processes through post-translational modification of proteins. A clinically significant proteolytic enzyme is neutrophil elastase (NE), which belongs to the GASPIDs (Granule-Associated Serine Peptidases of Immune Defense). In inflammation, NE exerts its catalytic activity and damaging potential, acting on a wide range of structural and regulatory proteins, thus participating in the pathogenesis of several NCDs. The most commonly used scientific and clinical laboratory methods for assessing NE, both circulating and complexed with an inhibitor, are reviewed.
OBJECTIVE
To analyze Russian and foreign publications on the relationship between neutrophil elastase and chronic non-communicable diseases and the prospects for using neutrophil elastase as a biomarker of low-grade inflammation in these diseases.
MATERIALS AND METHODS
The literature search was performed in the eLibrary.ru and PubMed databases using the keywords neutrophil elastase, biomarkers, biomarker analysis methods, and chronic non-communicable diseases.
RESULTS
The biochemical structure is analyzed, and the main functions and mechanisms of NE-mediated inflammation regulation in NCDs are presented. The test methods for NE activity and level and the possibilities and conditions for their use in scientific and clinical laboratory practice are discussed.
CONCLUSION
The role of neutrophil elastase in the pathogenesis of several chronic non-infectious diseases and significant change of its level/activity in the blood serum of patients compared to those of control groups support using this enzyme as a promising biomarker predicting the risk of these diseases and their complications.