Cited by 186Mechanisms of cancer metastasisCancer-related Molecular PathwaysSignaling Pathways in Disease

A novel transformation suppressor, Pdcd4, inhibits AP-1 transactivation but not NF-κB or ODC transactivation

Yang, Hsin-Sheng, Jansen, Aaron P, Nair, Rajalakshmi, Shibahara, Keiichi, Verma, Ajit K, Cmarik, Joan L, Colburn, Nancy H·2001·Oncogene

Abstract

Pdcd4 is a novel transformation suppressor that is highly expressed in promotion-resistant (P-) mouse epidermal JB6 cells but not in susceptible (P+) cells. Overexpression of pdcd4 cDNA in stably transfected P+ cells rendered cells resistant to tumor promoter-induced transformation, indicating that elevated expression of Pdcd4 protein is sufficient to suppress neoplastic transformation. To determine whether Pdcd4 suppresses neoplastic transformation through inhibiting known transformation required events, we examined the possibility that pdcd4 inhibited the activation of AP-1 or NF-kappaB dependent transcription or of ornithine decarboxylase (ODC) activity. Activation of AP-1-dependent transcriptional activity was inhibited by pdcd4 expression in a concentration dependent manner. In contrast, Pdcd4 slightly increased NF-kappaB-dependent transcription and did not alter ODC enzymatic activity. Previous studies suggested that activation of AP-1 was required for P+ cell transformation as well as for tumor promotion in vivo. These results indicate that Pdcd4 functions as a transformation suppressor, possibly through inhibiting AP-1 activation in combination with other factors such as enhancing NF-kappaB activation. Pdcd4 may thus constitute a useful molecular target for cancer prevention.

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Crossref · 10.1038/sj.onc.1204137

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Authors
Yang, H.-S., Jansen, A. P., Nair, R., Shibahara, K., Verma, A. K., Cmarik, J. L., & Colburn, N. H.
Affiliations
  • Frederick National Laboratory for Cancer Research (US)
  • University of Wisconsin–Madison (US)
  • Kyoto University (JP)
Venue
Oncogene
Published
2001-02-08
Volume
20
Issue
6
Pages
669-676
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2093224647
Cited by
185
References
38
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 1 · 2021: 7 · 2020: 2 · 2019: 5 · 2018: 7 · 2017: 8 · 2016: 8 · 2015: 7 · 2014: 17 · 2013: 17 · 2012: 12
FWCI
2.77
Type
journal article
Language
en
Open access
closed
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mechanisms of cancer metastasis
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
Keywords
PDCD4, AP-1 transactivation, NF-κB, ornithine decarboxylase, JB6 epidermal cells, transcriptional regulation, cancer prevention, tumor suppressor
MeSH terms
Animals, Cell Transformation, Neoplastic, Ornithine Decarboxylase, Proteins, Tetradecanoylphorbol Acetate, Transcriptional Activation, Genes, Tumor Suppressor, NF-kappa B, RNA-Binding Proteins, Transcription Factor AP-1, Apoptosis Regulatory Proteins, Mice

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