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B
Departments of 1 Surgery and 2 Pathology, University of Virginia Health Sciences Center, Charlottesville, Virginia 22908
A central role for nuclear
factor-
B (NF-
B) in the induction of lung inflammatory injury is
emerging. We hypothesized that NF-
B is a critical early regulator of
the inflammatory response in lung ischemia-reperfusion injury, and
inhibition of NF-
B activation reduces this injury and improves
pulmonary graft function. With use of a porcine transplantation model,
left lungs were harvested and stored in cold Euro-Collins preservation
solution for 6 h before transplantation. Activation of NF-
B
occurred 30 min and 1 h after transplant and declined to near
baseline levels after 4 h. Pyrrolidine dithiocarbamate (PDTC), a
potent inhibitor of NF-
B, given to the lung graft during organ
preservation (40 mmol/l) effectively inhibited NF-
B activation and
significantly improved lung function. Compared with control lungs
4 h after transplant, PDTC-treated lungs displayed significantly
higher oxygenation, lower PCO2, reduced mean
pulmonary arterial pressure, and reduced edema and cellular
infiltration. These results demonstrate that NF-
B is rapidly
activated and is associated with poor pulmonary graft function in
transplant reperfusion injury, and targeting of NF-
B may be a
promising therapy to reduce this injury and improve lung function.
pyrrolidine dithiocarbamate; ischemia; organ preservation
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