cell
Neutrophil
Short-lived innate responder that converts danger gradients into oxidative and proteolytic containment
Review layer
Last reviewed 2026-05-17
Systems teaching draft. Content is structured for education and graph expansion, with formal source tagging ready for the next review pass.
State signature
Systems profile
Local map
Relationship field
Graph neighborhood
Direct relationships
Neutrophil-rich inflammation often co-travels with IL-6 tone
Barrier chemokine programs recruit neutrophils
CXCR1/2-mediated neutrophil recruitment
Emergency myelopoiesis raises neutrophil supply during infection or inflammatory demand
Neutrophils are the short-lived effector core of pyogenic extracellular bacterial containment
Network behavior
Systems Overview
Neutrophils are rapid antimicrobial effectors whose trafficking, degranulation, NET formation, and resolution behavior strongly shape acute versus chronic inflammation.
Lineage
Origin
HSC -> common myeloid progenitor -> granulocyte-monocyte progenitor -> myeloblast -> band cell -> neutrophil
Transcription factors: C/EBPα, C/EBPε, GFI1, PU.1
Lifecycle Visualizer
6-10 days
Granulopoiesis
Marrow expansion
hours
Circulation
Patrolling and marginated pools
minutes-hours
Tissue recruitment
Gradient-following effector
hours-days
Resolution
Apoptosis and macrophage efferocytosis
Activation and Suppression
Surface and Secreted Signals
Metabolic State
Programs
Acute: Glycolysis supports migration, phagocytosis, oxidative burst, and NET formation.
Chronic: Persistent priming drives endothelial injury, protease burden, and tissue remodeling.
Tissue Roles
gut: Contain barrier breach but can intensify epithelial injury when recruitment persists.
lung: Dominant in bacterial pneumonia, severe asthma subsets, and ARDS-like injury.
skin: Forms pustular and abscess responses around microbial or sterile danger.
liver: Contributes to sterile inflammation and ischemia-reperfusion injury.
vasculature: Adheres to activated endothelium and influences thromboinflammation.
Disease Associations
Clinical Pearls
- High neutrophil tone means the system sees breach, necrosis, complement activation, or cytokine priming.
- NET biology connects infection defense to thrombosis, autoantigen exposure, and vascular injury.
- Resolution quality matters as much as recruitment intensity.