Gene therapy for lung cancer: Enhancement of tumor suppression by a combination of sequential systemic cisplatin and adenovirus-mediated p53 gene transfer

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Abstract

A more effective gene therapy strategy for lung cancer using sequential cisplatin administration and adenovirus-mediated p53 gene transfer was developed on the basis of our previous observation of enhanced expression of a reporter gene in malignant cells exposed to cisplatin before gene transfer. Transfer of the normal (wildtype) p53 gene into cisplatin-treated H1299 cells, in which p53 is homozygously deleted, resulted in up to a 60% further inhibition of cell proliferation in vitro than p53 transfer into untreated H1299 cells. The cisplatin plus p53 gene transfer strategy yielded significantly greater apoptosis and tumor growth suppression in an animal model of subcutaneous H1299 tumor nodules than wildtype p53 gene transfer alone. The timing of cisplatin administration and p53 gene transfer was shown to be critical: cisplatin administration simultaneous with or subsequent to p53 gene transfer was less effective than cisplatin-first sequential treatment. Moreover, the in vivo inhibition of tumor growth was maintained by repeated cycles of treatment. This gene therapy strategy has been incorporated into a phase I clinical trial for the treatment of lung cancer and provides a basis for the development of improved therapeutic protocols.

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Nguyen, D. M., Spitz, F. R., Yen, N., Cristiano, R. J., Roth, J. A., Kaiser, L. R., & Kim, J. (1996). Gene therapy for lung cancer: Enhancement of tumor suppression by a combination of sequential systemic cisplatin and adenovirus-mediated p53 gene transfer. Journal of Thoracic and Cardiovascular Surgery, 112(5), 1372–1377. https://doi.org/10.1016/S0022-5223(96)70154-X

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