© 2000 American Heart Association, Inc.
Integrative Physiology |
Antisense Intercellular Adhesion Molecule-1 (ICAM-1) Oligodeoxyribonucleotide Delivered During Organ Preservation Inhibits Posttransplant ICAM-1 Expression and Reduces Primary Lung Isograft Failure
From the Columbia University College of Physicians and Surgeons, New York, NY.
Correspondence to David J. Pinsky, Department of Medicine, Columbia University, PH 10-Stem, 630 West 168th St, New York, NY 10032. E-mail djp5{at}columbia.edu
Abstract—Transiently increased expression of leukocyte adhesion receptors after lung preservation contributes to early graft demise by recruiting leukocytes, activating complement, and causing microcirculatory stasis. We hypothesized that inhibiting intercellular adhesion molecule-1 (ICAM-1) expression even briefly may significantly improve lung graft function and that the preservation period might provide a unique window to deliver a therapeutic pulse of antisense oligonucleotide ICAM-1 to inhibit ICAM-1 expression after transplantation. Interleukin-1ß–treated rat pulmonary endothelial cells given a 20-mer phosphorothioate oligonucleotide comprising an antisense span targeted to the 3'-untranslated region of rat ICAM-1 demonstrated an oligonucleotide dose–dependent reduction in ICAM-1 expression. Using a cationic liposomal carrier, this same antisense oligonucleotide (but not the sense control) instilled into the pulmonary vasculature at the time of preservation reduced subsequent graft ICAM-1 expression and graft leukostasis and markedly improved oxygenation, pulmonary blood flow, and graft survival. These experiments demonstrate that the preservation period presents a window during which to target an anti–ICAM-1 expression strategy to inhibit early adhesion receptor expression and improve functional outcome after lung transplantation.
Key Words: intercellular adhesion molecule-1 • lung transplantation • isograft • leukocyte adhesion receptor
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