PreprintCited by 582Protein Kinase Regulation and GTPase SignalingCancer-related Molecular PathwaysKruppel-like factors research

Induction and apoptotic regression of lung adenocarcinomas by regulation of a K-Ras transgene in the presence and absence of tumor suppressor genes

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Fisher, Galen H., Wellen, Shari L., Klimstra, David, Lenczowski, Joi M., Tichelaar, Jay W., Lizak, Martin J., Whitsett, Jeffrey A., Koretsky, Alan +1 more·2001·Genes & Development

Abstract

To investigate the role of an activated K-Ras gene in the initiation and maintenance of lung adenocarcinomas, we developed transgenic mice that express murine K-Ras4b G12D under the control of doxycycline in type II pneumocytes. Focal proliferative lesions of alveolar type II pneumocytes were observed as early as seven days after induction with doxycycline; after two months of induction, the lungs contained adenomas and adenocarcinomas, with focal invasion of the pleura at later stages. Removal of doxycycline caused a rapid fall in levels of mutant K-Ras RNA and concomitant apoptotic regression of both the early proliferative lesions and the tumors. Tumor burden was dramatically decreased by three days after withdrawal, and tumors were undetectable after one month. When similar experiments were performed with animals deficient in either the p53 gene or the Ink4A/Arf locus, tumors arose more quickly (within one month of exposure to doxycycline) and displayed more obvious histological features of malignancy; nevertheless, these tumors also regressed rapidly when the inducer was removed, implying that continued production of mutant K-Ras is necessary to maintain the viability of tumor cells in the absence as well as the presence of tumor suppressor genes. We also show that the appearance and regression of these pulmonary tumors can be readily monitored in anesthetized transgenic animals by magnetic resonance imaging.

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  • Loss of p53 or expression of dominant negative or gain-of-function Trp53 mutants co-operate with oncogenic Kras to induce LUADs with shortened latency and increased metastatic proclivity, although these tumors are less aggressive than those with Lkb1 loss.

    “Loss of p53 or expression of either dominant negative or dominant gain-of-function Trp53 mutants also co-operate with oncogenic Kras to induce LUADs with shortened latency and increased metastatic proclivity, although these tumors are less aggressive than those with Lkb1 loss69–71, 84.”

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Research works printed but not linked: 1

  1. Ginsberg, R., Vokes, E., and Rosenzweig, K. 2001. Non-small cell lung cancer. In Cancer: Principles and practice of oncol- ogy (eds. V. De Vitta, S. Hellman, and S. Rosenberg), pp. 925-983.

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Authors
Fisher, G. H., Wellen, S. L., Klimstra, D., Lenczowski, J. M., Tichelaar, J. W., Lizak, M. J., Whitsett, J. A., Koretsky, A., & Varmus, H. E.
Affiliations
  • National Institutes of Health (US)
  • Cincinnati Children's Hospital Medical Center (US)
Corresponding author
Varmus, Harold E.
Venue
Genes & Development
Published
2001-12-15
Volume
15
Issue
24
Pages
3249-3262
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2110719738
Cited by
582
References
46
Citations by year
2026: 4 · 2025: 5 · 2024: 8 · 2023: 15 · 2022: 13 · 2021: 24 · 2020: 14 · 2019: 9 · 2018: 25 · 2017: 28 · 2016: 20 · 2015: 30 · 2014: 30 · 2013: 23 · 2012: 32
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Cystic Fibrosis Foundation
  • Massachusetts Institute of Technology
  • Memorial Sloan-Kettering Cancer Center
  • National Institutes of Health
  • National Human Genome Research Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Kruppel-like factors research
Keywords
lung adenocarcinoma, KRAS, doxycycline-inducible transgene, alveolar type II cells, tumor regression, apoptosis, p53, Ink4a/Arf, tumor suppressor, transgenic mice
MeSH terms
Adenocarcinoma, Adenoma, Animals, Bromodeoxyuridine, Genotype, Lung Neoplasms, Mice, Transgenic, Models, Genetic, Neoplasm Recurrence, Local, Genes, ras, Tetracycline, Gene Expression Regulation, Neoplastic, Genes, Tumor Suppressor, Tumor Suppressor Protein p53, Apoptosis, DNA Primers, Mice, Knockout, Transgenes, Cyclin-Dependent Kinase Inhibitor p16, Reverse Transcriptase Polymerase Chain Reaction, In Situ Nick-End Labeling, Mice

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