Cited by 41TGF-β signaling in diseasesMechanisms of cancer metastasisCancer-related Molecular Pathways

Convergence of p53 and Transforming Growth Factor β (TGFβ) Signaling on Activating Expression of the Tumor Suppressor Gene maspin in Mammary Epithelial Cells

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Wang, Shizhen Emily, Narasanna, Archana, Whitell, Corbin W., Wu, Frederick Y., Friedman, David B., Arteaga, Carlos L.·2007·Journal of Biological Chemistry

Abstract

Using two-dimensional difference gel electrophoresis, we identified the tumor suppressor gene maspin as a transforming growth factor beta (TGFbeta) target gene in human mammary epithelial cells. TGFbeta up-regulatesMaspin expression both at the RNA and protein levels. This up-regulation required Smad2/3 function and intact p53-binding elements in the Maspin promoter. DNA affinity immunoblot and chromatin immunoprecipitation revealed the presence of both Smads and p53 at the Maspin promoter in TGFbeta-treated cells, suggesting that both transcription factors cooperate to induce Maspin transcription. TGFbeta did not activate Maspin-luciferase reporter in p53-mutant MDA-MB-231 breast cancer cells, which exhibit methylation of the endogenous Maspin promoter. Expression of ectopic p53, however, restored ligand-induced association of Smad2/3 with a transfected Maspin promoter. Stable transfection of Maspin inhibited basal and TGFbeta-stimulated MDA-MB-231 cell motility. Finally, knockdown of endogenous Maspin in p53 wild-type MCF10A/HER2 cells enhanced basal and TGFbeta-stimulated motility. Taken together, these data support cooperation between the p53 and TGFbeta tumor suppressor pathways in the induction of Maspin expression, thus leading to inhibition of cell migration.

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  • SERPINB5 is a transcriptional target of the functional convergence of p53 and TGF-h pathways.

    “Interestingly, a transcriptional target of the functional convergence of these pathways is SERPINB5, the transcript most highly up-regulated in response to miR-21 knockdown (Fig. 2A; ref. 42).”

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  1. Siegel, P. M., Shu, W., Cardiff, R. D., Muller, W. J., and Massague, J. (2003) Proc. Natl. Acad. Sci. U. S. A. 100, 8430 -8435
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Authors
Wang, S. E., Narasanna, A., Whitell, C. W., Wu, F. Y., Friedman, D. B., & Arteaga, C. L.
Affiliations
Vanderbilt University (US)
Corresponding author
Arteaga, Carlos L.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2007-02
Volume
282
Issue
8
Pages
5661-5669
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2153767510
Cited by
41
References
40
Citations by year
2025: 1 · 2024: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 5 · 2013: 1 · 2012: 6
FWCI
1.86
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Vanderbilt University (P30 CA68485, CA68485)
  • National Institutes of Health (CA68485, P50 CA98131)
  • Uniformed Services University of the Health Sciences
  • National Cancer Institute (P50 CA98131, R01 CA80195, P30 CA 68485, R01 CA-62212, R01CA080195, K99CA125892, R00CA125892, R01CA062212, P50CA098131, P30CA068485)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mechanisms of cancer metastasis
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
maspin, p53, TGF-beta signaling, Smad2/3, mammary epithelial cells, tumor suppressor, transcriptional regulation, promoter methylation, cell motility, breast cancer, MDA-MB-231 cells, p53 mutant cells
MeSH terms
Cell Movement, Epithelial Cells, Humans, Promoter Regions, Genetic, Signal Transduction, Transcriptional Activation, Serpins, Up-Regulation, Genes, Tumor Suppressor, Tumor Suppressor Protein p53, Transforming Growth Factor beta, Mammary Glands, Human, Cell Line, Tumor, Smad2 Protein, Smad3 Protein

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