Cited by 282Protein Kinase Regulation and GTPase SignalingMelanoma and MAPK PathwaysProtein Tyrosine Phosphatases

Cellular Transformation and Malignancy Induced by ras Require c-jun

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Johnson, Randall, Spiegelman, Bruce, Hanahan, Douglas, Wisdom, Ron·1996·Molecular and Cellular Biology

Abstract

ras is an important oncogene in experimental animals and humans. In addition, activated ras proteins are potent inducers of the transcription factor AP-1, which is composed of heterodimeric complexes of Fos and Jun proteins. Together with the fact that deregulated expression of some AP-1 proteins can cause neoplastic transformation, this finding suggests that AP-1 may function as a critical ras effector. We have tested this hypothesis directly by analyzing the response to activated ras in cells that harbor a null mutation in the c-jun gene. The transcriptional response of AP-1-responsive genes to activated ras is severely impaired in c-jun null fibroblasts. Compared with wild-type cells, the c-jun null cells lack many characteristics of ras transformation, including loss of contact inhibition, anchorage independence, and tumorigenicity in nude mice; these properties are restored by forced expression of c-jun. Rare tumorigenic variants of ras-expressing c-jun null fibroblasts do arise. Analysis of these variants reveals a consistent restoration of AP-1 activity. The results provide genetic evidence that c-jun is a crucial effector for transformation by activated ras proteins.

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Crossref · 10.1128/mcb.16.8.4504

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Authors
Johnson, R., Spiegelman, B., Hanahan, D., & Wisdom, R.
Affiliations
  • University of California, San Francisco (US)
  • Harvard University (US)
  • Vanderbilt University (US)
Venue
Molecular and Cellular Biology
Published
1996-08
Volume
16
Issue
8
Pages
4504-4511
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W1895834181
Cited by
282
References
61
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 5 · 2022: 1 · 2021: 4 · 2020: 6 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 6 · 2015: 7 · 2014: 4 · 2013: 8 · 2012: 2
FWCI
6.82
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Cancer Society
  • National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
c-Jun, oncogenic Ras, AP-1 transcription factor, Fos-Jun heterodimer, oncogenic transformation, anchorage-independent growth, tumorigenicity, Ras effectors
MeSH terms
Animals, Base Sequence, Cell Cycle, Cell Transformation, Neoplastic, Cells, Cultured, Molecular Sequence Data, Oligodeoxyribonucleotides, Genes, ras, Proto-Oncogene Proteins p21(ras), Proto-Oncogene Proteins c-jun, Genes, jun, Mice, Knockout, Mice

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