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Endotoxins, arachidonic acid, and superoxide formation
Reviews of Infectious Diseases
|September 1, 1987
Summary
Altered eicosanoid metabolism and free radicals contribute to endotoxemia. Specific prostanoids and leukotrienes play roles in shock, lung damage, and liver destruction, influencing endotoxin lethality.
Area of Science:
- Biochemistry
- Immunology
- Pathophysiology
Background:
- Endotoxemia involves complex pathophysiologic changes.
- Eicosanoids and free radicals are implicated in endotoxemia's effects.
Purpose of the Study:
- To review the pathophysiologic relevance of eicosanoid metabolism and free-radical production in endotoxemia.
Main Methods:
- Literature review of studies on endotoxemia, eicosanoids, and free radicals.
- Analysis of species-specific, tissue-specific, and endotoxin-specific responses.
Main Results:
- Prostacyclin contributes to hypotension but not lethality in endotoxemia.
- Prostaglandin E1 and prostacyclin analogues prevent endotoxin lethality.
- Leukotriene D4 contributes to lung and liver damage.
- Complement activation in vivo drives free-radical formation and lung injury.
Conclusions:
- Eicosanoids and free radicals are critical mediators in endotoxemia.
- Targeting specific eicosanoids may offer therapeutic strategies against endotoxemia.