In Vivo Transfer and Expression of the lacZ Gene in the Mouse Lung

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Abstract
In vivo gene transfer by lipofection was studied in the mouse lung to develop a gene therapy protocol for disorders in which the lung is affected, such as cystic fibrosis. The bacterial lacZ gene encoding β-galactosidase was used as a reporter, and the X-GAL staining procedure was optimized for cryostat sections of mouse lung. Three to five days after intratracheal instillation of a lacZ DNA-liposome mixture, lacZ expression was shown in a high percentage of airway epithelium cells. The staining proved to be restricted mainly to the epithelium of the bronchi.