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Endotoxin-induced organ injury
S Ghosh1, R D Latimer, B M Gray
1Department of Anaesthesia, Papworth Hospital, Cambridge, UK.
Critical Care Medicine
|February 1, 1993
Summary
Endotoxemia triggers a cascade of mediators, causing widespread organ injury. The specific mediators and their impact on tissue damage vary by species and experimental models.
Area of Science:
- Immunology
- Pathophysiology
- Toxicology
Background:
- Endotoxemia, caused by bacterial endotoxins, profoundly impacts major organ systems.
- Understanding endotoxin's effects is crucial for managing sepsis and related conditions.
Purpose of the Study:
- To review the systemic effects of endotoxemia on organ systems.
- To discuss potential mechanisms underlying endotoxin-induced tissue injury.
Main Methods:
- Systematic appraisal of 60 scientific articles.
- Inclusion of in vivo and in vitro studies.
- Analysis of cell cultures, isolated tissue preparations, and human/animal studies.
Main Results:
- Endotoxemia activates diverse cellular and hematogenous mediators, including prostaglandins, leukotrienes, and complement factors.
- Tumor necrosis factor (TNF) may initiate many endotoxin responses.
- Significant species and tissue specificity observed in endotoxin reactions.
Conclusions:
- No single mediator fully explains endotoxin-induced organ injury.
- Endotoxin initiates a cascade of amplifying secondary mediators.
- The role of specific mediators in endotoxin response is model-dependent.