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[Endotoxin and its binding protein in organ failure]
1First Department of Surgery, Mie University School of Medicine, Tsu, Japan.
Nihon Geka Gakkai Zasshi
|October 28, 1998
Summary
Bacterial translocation causes endotoxin (lipopolysaccharide: LPS) infection, leading to organ failure after liver resection. Targeting LPS-binding protein (LBP) and CD14 may prevent this excessive inflammatory response.
Area of Science:
- Hepatology
- Immunology
- Sepsis Research
Context:
- Extensive liver resection can lead to bacterial translocation and endotoxin (lipopolysaccharide: LPS) infection.
- This infection is a key factor in organ failure following invasive procedures.
- The mechanisms involve LPS binding to LPS-binding protein (LBP) and activation via CD14 on monocytes and Kupffer cells.
Purpose:
- To elucidate the network mechanism of LPS-induced organ failure after liver resection.
- To highlight the roles of LBP and CD14 in this inflammatory cascade.
- To identify potential therapeutic targets for preventing post-operative organ dysfunction.
Summary:
- LPS translocation post-liver resection activates monocytes and Kupffer cells via LBP and CD14, leading to inflammatory cytokine release (TNF-alpha, IL-6).
- Activated cytokines damage sinusoidal endothelial cells, reducing anticoagulant function and causing microthrombi, resulting in circulatory insufficiency.
- LPS levels peak 6 hours post-surgery, while LBP production peaks at 12 hours, suggesting a critical window for intervention.
Impact:
- Understanding this mechanism is crucial for preventing organ failure after major surgery.
- Focusing on LBP and CD14 offers a potential strategy to inhibit excessive inflammatory reactions.
- Future studies should investigate suppressing LBP expression within 12 hours to mitigate adverse outcomes.