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Xenon modulates neutrophil adhesion molecule expression in vitro
L W de Rossi1, N A Horn, A Stevanovic
1University Hospital, Department of Anaesthesiology, Aachen, Germany. Lderossi@ukaachen.de
European Journal of Anaesthesiology
|February 24, 2004
Summary
Xenon gas reduces key adhesion molecules on neutrophils, potentially mitigating injury during ischemia and reperfusion. This study explored xenon's effects on neutrophil function in vitro.
Area of Science:
- Cardiovascular Research
- Anesthesiology
- Immunology
Background:
- Ischemia/reperfusion injury involves neutrophil adhesion molecules.
- Xenon is known to reduce infarct size in rabbit hearts.
- The mechanisms behind xenon's protective effects are not fully understood.
Purpose of the Study:
- To investigate the in vitro effects of xenon on neutrophil adhesion molecule expression.
- To determine if xenon modulates neutrophil surface markers involved in endothelial adhesion.
Main Methods:
- Human neutrophils were incubated with 30% or 60% xenon.
- Neutrophil surface expression of PSGL-1, L-selectin, CD11a, and CD11b was measured.
- Flow cytometry was used to quantify adhesion molecule expression in stimulated and unstimulated neutrophils.
Main Results:
- Xenon (60%) significantly reduced surface expression of PSGL-1 (10%) and L-selectin (15%).
- Xenon (30%) increased the removal of L-selectin from activated neutrophils.
- Neutrophil beta2-integrin expression (CD11a, CD11b) remained unaffected by xenon.
Conclusions:
- Xenon promotes the removal of selectins (PSGL-1, L-selectin) from the neutrophil surface in vitro.
- This reduction in selectins may decrease neutrophil adhesion to endothelium during ischemia/reperfusion.
- Further research is needed to confirm xenon's effect on neutrophil transmigration in vivo.