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Enhanced isolated lung function after ischemia with anti-intercellular adhesion molecule antibody
S A Buchanan1, M C Mauney, N F deLima
1Department of Surgery, University of Virginia Health Sciences Center, Charlottesville 22098, USA.
Summary
This study shows that an anti-intercellular adhesion molecule antibody improves lung oxygenation after reperfusion. The antibody reduced leukocyte infiltration, preventing reperfusion injury in a rabbit lung model.
Area of Science:
- Cardiovascular Research
- Immunology
- Pulmonary Medicine
Background:
- Leukocyte adhesion to endothelial cells during ischemia-reperfusion causes injury.
- Targeting leukocyte-endothelial interactions may prevent reperfusion injury.
Purpose of the Study:
- To investigate the effect of anti-intercellular adhesion molecule (ICAM) antibody on lung function during reperfusion.
- To assess if ICAM blockade can mitigate leukocyte-mediated reperfusion injury.
Main Methods:
- Isolated, ventilated, blood-perfused rabbit lung preparation.
- Lungs stored for 18 hours with cold flush and prostaglandin E1.
- Treatment groups received low-dose (100 µg) or high-dose (200 µg) anti-ICAM antibody.
- Control groups received saline vehicle or immediate reperfusion.
Main Results:
- High-dose anti-ICAM antibody significantly improved blood oxygen tension post-reperfusion (139.33 mmHg vs. 58.86 mmHg in controls).
- Anti-ICAM antibody treatment dose-dependently reduced leukocyte infiltration in lung tissue (grade 1.2 vs. 3.0 in controls).
- Both antibody doses showed improved oxygenation and reduced leukocyte infiltration compared to 18-hour controls.
Conclusions:
- Anti-ICAM antibody administration enhances the oxygenating capacity of reperfused lungs.
- This improvement is likely due to reduced leukocyte sequestration and subsequent prevention of reperfusion injury.
- The findings support ICAM blockade as a therapeutic strategy for preserving lung function during reperfusion.