Abstract
Adenoviral-targeted gene delivery to respiratory epithelium can augment production of specific proteins. Therefore, it may be valuable in treating the acute respiratory distress syndrome. The authors tested the hypothesis that adenoviral vector uptake after cecal ligation and double puncture in rats, an animal model of the acute respiratory distress syndrome, is higher than that observed in controls that did not undergo operation ("nonoperated") or those that underwent a sham operation ("sham-operated"). Adenoviruses expressing green fluorescent protein or Lac-Z were delivered into the lungs of anesthetized rats via tracheal catheter. Animals were killed 24 or 48 h later. Histopathology and green fluorescent protein expression were examined using light of fluorescence microscopy. Cellular localization of Lac-Z was determined with electron microscopy or semithin sectioning. Viral receptor density and localization were determined using imunoblotting and immunohistochemistry. After cecal ligation and double puncture, rats were hypoxic and tachypneic. Alveoli were segmentally consolidated, contained proteinaceous debris and neutrophils, and had thickened septa. Administration of adenoviruses to rats that were sham-operated or under...Continue Reading
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