Neutrophils: a new target for postoperative cognitive dysfunction

Area of Science:

• Neuroscience
• Immunology
• Geriatric Medicine

Background:

• Postoperative cognitive dysfunction (POCD) is a common central nervous system complication after surgery, especially in the elderly.
• Surgical stress and anesthesia can induce systemic inflammation, leading to neuroinflammation and cognitive decline.
• Neutrophils are key immune cells implicated in the inflammatory pathways contributing to POCD.

Purpose of the Study:

• To systematically review recent findings on neutrophil functions in the context of POCD.
• To explore the role of neutrophils in neuroinflammation and blood-brain barrier alterations following surgery.
• To offer new perspectives for POCD research and clinical interventions.

Main Methods:

• Systematic literature review of recent research on neutrophils and POCD.
• Analysis of studies investigating neutrophil activation, cytokine/chemokine secretion, and NET formation.
• Examination of research on neutrophil-mediated blood-brain barrier permeability changes.

Main Results:

• Neutrophils are rapidly activated peripherally, releasing inflammatory mediators and neutrophil extracellular traps (NETs).
• Neutrophil infiltration into the brain contributes significantly to neuroinflammation in POCD.
• Neutrophils can increase blood-brain barrier permeability, exacerbating cognitive impairment.

Conclusions:

• Neutrophils are critical effectors in the pathogenesis of POCD.
• Understanding neutrophil functions provides a basis for developing targeted therapies for POCD.
• Further research into neutrophil mechanisms can optimize clinical strategies for preventing and treating POCD.