Cancer Institute A national cancer institute
designated cancer center

Christopher H. Contag

Publication Details

  • HO-1 expression in type II pneumocytes after transpulmonary gene delivery AMERICAN JOURNAL OF PHYSIOLOGY-LUNG CELLULAR AND MOLECULAR PHYSIOLOGY Weng, Y. H., Tatarov, A., Bartos, B. P., Contag, C. H., Dennery, P. A. 2000; 278 (6): L1273-L1279


    Somatic cell gene transfer is a potentially useful strategy to alter lung function. However, achieving efficient transfer to the alveolar epithelium, especially in smaller animals, has not been demonstrated. In this study, the rat heme oxygenase-1 (HO-1) gene was delivered to the lungs of neonatal mice via transpulmonary injection. A bidirectional promoter construct coexpressing both HO-1 and a luciferase reporter gene was used so that in vivo gene expression patterns could be monitored in real time. HO-1 expression levels were also modulated with doxycycline and assessed in vivo with bioluminescent light transmitted through the tissues from the coregulated luciferase reporter. As a model of oxidative stress and HO-1-mediated protection, groups of animals were exposed to hyperoxia. After gene transfer, elevated levels of HO-1 were detected predominantly in alveolar type II cells by immunocytochemistry. With overexpression of HO-1, increased oxidative injury was observed. Furthermore, this model demonstrated a cell-specific effect of lung HO-1 overexpression in oxidative stress. Specific control of expression for therapeutic genes is possible in vivo. The transpulmonary approach may prove useful in targeting gene expression to cells of the alveolar epithelium or to circumscribed areas of the lung.

    View details for Web of Science ID 000087573600020

    View details for PubMedID 10835334

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