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Endothelial structural integrity is maintained during endotoxic shock in an interleukin-1 type 1 receptor knockout
E T Sutton1, J G Norman, C A Newton
1Department of Physiology and Biophysics, College of Medicine, University of South Florida, Tampa 33612, USA.
Shock (Augusta, Ga.)
|February 1, 1997
Summary
Interleukin-1 (IL-1) significantly contributes to sepsis-induced endothelial damage. Blocking the IL-1 receptor protected aortic endothelial cells from endotoxin-induced injury in mice, highlighting IL-1
Area of Science:
- Vascular biology
- Immunology
- Pathophysiology of shock
Background:
- Arterial endothelial cell morphology changes indicate severe shock.
- Interleukin-1 (IL-1) is implicated in endotoxemia-related endothelial damage.
Purpose of the Study:
- To investigate the role of IL-1 receptor signaling in maintaining aortic endothelial cell integrity during endotoxemia.
- To assess the impact of IL-1 receptor deficiency on endothelial structure in response to endotoxin.
Main Methods:
- Administered endotoxin (Escherichia coli) or saline to wild-type and IL-1 receptor knockout mice.
- Evaluated aortic endothelial cell structural integrity using ultrastructural analysis.
- Measured serum IL-6 and nitric oxide levels.
Main Results:
- Wild-type mice treated with endotoxin showed extensive endothelial damage.
- IL-1 receptor knockout mice exhibited complete maintenance of endothelial structural integrity post-endotoxin.
- No correlation was found between IL-6/nitric oxide levels and endothelial damage.
Conclusions:
- IL-1 signaling is a significant contributor to sepsis-induced endothelial damage.
- Blocking the IL-1 receptor protects endothelial cells from endotoxin-induced injury.
- IL-1 receptor antagonism is a potential therapeutic strategy for sepsis.