Lung-specific expression of dominant-negative mutant p53 in transgenic mice increases spontaneous and benzo(a)pyrene-induced lung cancer

Kam Meng Tchou-Wong, Yixing Jiang, Herman Yee, Jennifer LaRosa, Theodore C. Lee, Angel Pellicer, Jaishree Jagirdar, Terry Gordon, Judith D. Goldberg, William N. Rom

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Mutations in the p53 gene have been implicated to play an important role in the development of various human cancers. To evaluate the importance of p53 in lung cancer, a transgenic mouse model was established by utilizing the Clara cell secretory protein (CCSP) promoter to target the expression of a dominant-negative mutant form of p53 (dnp53) in the lung. In two transgenic CCSP-dnp53 founder lines, the dnp53 protein was expressed exclusively in the lungs. The incidence of spontaneous lung cancer in 18-month-old transgenic mice was 45%, whereas that in age-matched control mice was 20%. The relative risk of lung tumors in CCSP-dnp53 mice was 2.3 times that of wild-type mice (exact confidence limits of 0.69, 17.5). In addition to the increased incidence of spontaneous lung tumor, these mice were more susceptible to the development of lung adenocarcinoma after exposure to benzo(a)pyrene (BaP). Six months after intratracheal instillation of benzo(a)pyrene, the tumor incidence in wild-type and CCSP-dnp53 mice was 39% and 73%, respectively. The risk of lung tumors was 25.3 times greater in BaP-treated mice adjusted for transgene expression (95% confidence limits of 3.29, 678, mid-p corrected). These results suggest that p53 function is important for protecting mice from both spontaneous and BaP-induced lung cancers.

Original languageEnglish (US)
Pages (from-to)186-193
Number of pages8
JournalAmerican journal of respiratory cell and molecular biology
Volume27
Issue number2
DOIs
StatePublished - 2002

ASJC Scopus subject areas

  • Molecular Biology
  • Pulmonary and Respiratory Medicine
  • Clinical Biochemistry
  • Cell Biology

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    Tchou-Wong, K. M., Jiang, Y., Yee, H., LaRosa, J., Lee, T. C., Pellicer, A., Jagirdar, J., Gordon, T., Goldberg, J. D., & Rom, W. N. (2002). Lung-specific expression of dominant-negative mutant p53 in transgenic mice increases spontaneous and benzo(a)pyrene-induced lung cancer. American journal of respiratory cell and molecular biology, 27(2), 186-193. https://doi.org/10.1165/ajrcmb.27.2.4799