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Effects of lung preservation solutions on PMN activation in vitro
F Sakamaki1, H Hoffmann, S Münzing
1Department of medicine, National Cardiovascular Center, Osaka, Japan.
Abstract:
Polymorphonuclear leukocyte (PMN) activation and PMN-endothelial cell interactions may cause graft failure due to ischemia-reperfusion injury after lung transplantation. We investigated the effects of Euro-Collins solution (EC), low-potassium dextran solution (LPD), and EC plus pentoxifylline (EC-PTXF) on adhesion molecule (CD11b/CD18 and L-selectin) expression, chemotaxis, and oxidative burst of PMN. PMN from healthy human volunteers were incubated with EC, LPD, and EC-PTXF, and, in controls, without preservation solution. LPD exerted a suppressive effect on PMN chemotaxis as compared to EC (P < 0.05), but had no attenuating effect on the increase of CD11b/CD18, the shedding of L-selectin, and intracellular oxidant generation. EC-PTXF attenuated the expression of CD11b/CD18 and the oxidative burst as compared to EC alone (P < 0.05). These effects of LPD and PTXF on PMN function may contribute to successful organ preservation in transplantation.
Insights
Low-potassium dextran solution (LPD) and Euro-Collins solution plus pentoxifylline (EC-PTXF) impact polymorphonuclear leukocyte (PMN) function. EC-PTXF reduced PMN activation, potentially improving lung transplant outcomes.
Area of Science:
- Transplantation immunology
- Cellular biology
- Biochemistry
Background:
- Polymorphonuclear leukocytes (PMNs) and their interactions with endothelial cells contribute to ischemia-reperfusion injury, a cause of graft failure in lung transplantation.
- Understanding how preservation solutions affect PMN function is crucial for optimizing organ preservation strategies.
Purpose of the Study:
- To investigate the effects of Euro-Collins solution (EC), low-potassium dextran solution (LPD), and EC plus pentoxifylline (EC-PTXF) on PMN activation.
- To evaluate the impact of these solutions on adhesion molecule expression, chemotaxis, and oxidative burst in PMNs.
Main Methods:
- Human PMNs were incubated with EC, LPD, and EC-PTXF, with controls lacking preservation solution.
- Assessed were PMN chemotaxis, CD11b/CD18 and L-selectin expression, and intracellular oxidant generation.
Main Results:
- LPD suppressed PMN chemotaxis compared to EC (P < 0.05) but did not affect CD11b/CD18 expression, L-selectin shedding, or oxidant generation.
- EC-PTXF significantly attenuated CD11b/CD18 expression and oxidative burst compared to EC alone (P < 0.05).
Conclusions:
- LPD demonstrates a specific inhibitory effect on PMN chemotaxis.
- EC-PTXF effectively reduces PMN activation markers and oxidative burst, suggesting a beneficial role in lung preservation.
- These findings indicate that LPD and EC-PTXF may enhance organ preservation success in transplantation by modulating PMN function.