Somatic gene therapy for cystic fibrosis

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Abstract
There is considerable potential to ameliorate the pulmonary disease in cystic fibrosis (CF) using somatic gene therapy. Even low levels of expression of the gene in airways epithelium may be beneficial. Adenoviral vectors, DNA-liposome complexes, adeno-associated viral vectors and DNA-ligand complexes have been used effectively in vitro and have been tested in animals to varying extent. Adenoviral vectors and DNA-liposome complexes are being used to deliver the CF gene to patient airways in phase I clinical trials. Transient correction of the electrophysiological defect in human CF nasal epithelium has been achieved. Major goals are (i) to demonstrate that expression of the CF gene in airways epithelium will ameliorate lung disease in CF patients, and (ii) to achieve long-term expression of the introduced gene either through a single delivery with persistent expression or through the ability to use a delivery system repetitively with safety and efficacy.

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