Inflammatory Mediators in Neutrophil Activation
Summary
Neutrophils are frontline defenders in innate immunity, rapidly mobilised to sites of tissue damage or infection. Their activation is orchestrated by a complex milieu of inflammatory mediators, including cytokines, chemokines, lipid autacoids and complement fragments. These signals guide neutrophils via chemotaxis to the inflamed focus, where they engage in phagocytosis, degranulation and generation of reactive oxygen species. In parallel, neutrophils can expel neutrophil extracellular traps (NETs), webs of DNA and antimicrobial proteins that immobilise pathogens but may also exacerbate tissue injury and thrombosis. A finely tuned balance of pro- and anti-inflammatory mediators governs the magnitude and duration of neutrophil responses, ensuring effective microbial clearance while limiting collateral damage. Dysregulated activation underlies a spectrum of disorders, from sepsis and acute respiratory distress to chronic inflammatory diseases and autoimmunity. Current research seeks to unravel the signalling pathways and transcriptional networks that integrate diverse mediators and to identify targets for therapeutic modulation to restore homeostasis without compromising host defence.
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Inflammatory Mediators in Neutrophil Activation publication trend
The graph below shows the total number of articles in inflammatory mediators in neutrophil activation across all publications each year (not limited to Nature Index journals).
Technical terms
Cytokines: soluble proteins secreted by immune and stromal cells that regulate cell activation, proliferation and recruitment.
Chemokines: specialised cytokines that establish directional gradients to guide leukocyte migration.
Reactive Oxygen Species (ROS): chemically reactive molecules produced by neutrophil NADPH oxidase that destroy pathogens.
Neutrophil Extracellular Traps (NETs): extracellular fibres of DNA and antimicrobial proteins released by neutrophils to ensnare microbes.
Chemotaxis: directed cell movement along a chemical gradient toward higher concentrations of attractants.
NHE1 (sodium-proton exchanger 1): membrane transporter that regulates intracellular pH by exchanging intracellular H⁺ for extracellular Na⁺.
References
- Identification of a forkhead box protein transcriptional network induced in human neutrophils in response to inflammatory stimuli. Frontiers in Immunology (2023).
- Ion and Water Transport in Neutrophil Granulocytes and Its Impairment during Sepsis. International Journal of Molecular Sciences (2021).
- Activation of Neutrophil Granulocytes by Platelet-Activating Factor Is Impaired During Experimental Sepsis. Frontiers in Immunology (2021).
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