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[The role of the polymorphonuclear neutrophil in the failure of multiple organs and systems]
1Departamento de Cirurgia, Universidade de São Paulo.
Abstract:
The role of the polymorphonuclear neutrophil (PMN) on MOF is analyzed either as PMN activation for superoxide and enzyme release, or as PMN function depression after trauma and surgery. The authors stress: 1) the signal transduction pathway from the PMN membrane receptors to the effector response; 2) the PMN-NADPH system structure and function; 3) the functional states of the PMN (quiescente, primed, activated, non-responsive) in terms of the NADPH system activation; 4) the mechanism of tissue injuiry by the PMN. Clinical investigations on the PMN activation state, and therapeutical goals based on recent clinical investigations are also discussed.
Insights
Polymorphonuclear neutrophils (PMNs) play a dual role in multiple organ failure (MOF), exhibiting activation or depression. Understanding PMN function and signaling is crucial for developing new therapeutic strategies.
Area of Science:
- Immunology
- Cellular Biology
- Pathophysiology
Context:
- Multiple organ failure (MOF) involves complex immune responses.
- Polymorphonuclear neutrophils (PMNs) are key immune cells implicated in MOF.
- PMN function can be either enhanced or suppressed following trauma and surgery.
Purpose:
- To analyze the dual role of PMNs in MOF.
- To elucidate PMN signal transduction pathways and NADPH system function.
- To define PMN functional states and their relation to tissue injury.
Summary:
- This study examines PMN activation and depression in MOF, detailing signal transduction, the PMN-NADPH system, and functional states.
- It explores the mechanisms of PMN-mediated tissue injury.
- Clinical investigations and therapeutic targets related to PMN activation states are discussed.
Impact:
- Provides insights into PMN behavior in critical illness.
- Highlights the importance of the PMN-NADPH system in MOF.
- Informs potential therapeutic interventions aimed at modulating PMN function in MOF.