Neutrophil inflammatory functions

Neutrophil inflammatory functions encompass the diverse set of biological activities performed by neutrophils, the primary cellular component of the innate immune system, to combat infection and respond to tissue damage (Kolaczkowska & Kubes, 2013). Key processes include chemotaxis, phagocytosis, the oxidative burst (production of reactive oxygen species), degranulation (release of proteases like neutrophil elastase and myeloperoxidase), and the formation of neutrophil extracellular traps (NETosis) (Brinkmann et al., 2004). While these functions are vital for host defense, their dysregulation or chronic activation is a central driver of pathology in inflammatory diseases such as chronic obstructive pulmonary disease (COPD), rheumatoid arthritis, and acute respiratory distress syndrome (ARDS) (Ley et al., 2007). Pharmacological intervention typically targets specific molecular components of these functions, such as chemokine receptors (CXCR1/2) or serine proteases, to mitigate tissue injury while attempting to preserve essential immune surveillance (Ohbayashi, 2002; Insmed, 2024). Balancing the suppression of these functions with the need to maintain host defense remains a primary challenge in clinical applications.

Other names

Neutrophil activationNeutrophil effector functionsNeutrophil-mediated inflammation

Inhibition of neutrophil recruitment via chemokine receptor antagonism, inhibition of serine protease activity (e.g., neutrophil elastase), inhibition of reactive oxygen species production, and suppression of neutrophil extracellular trap (NET) formation.