Cited by 56TGF-β signaling in diseasesDevelopmental Biology and Gene RegulationKruppel-like factors research

The oncogenic TBX3 is a downstream target and mediator of the TGF-β1 signaling pathway

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Li, Jarod, Weinberg, Marc S., Zerbini, Luiz, Prince, Sharon·2013·Molecular Biology of the Cell

Abstract

The T-box transcription factor, TBX3, plays an important role in embryonic development, and haploinsufficiency of TBX3 causes ulnar–mammary syndrome. Overexpression of TBX3, on the other hand, is associated with several cancers, and preliminary evidence suggests that increased levels of TBX3 may inhibit cell proliferation but promote tumor migration and invasion. Although this suggests that deregulated levels of TBX3 are deleterious in development and promotes disease, very little is known about the signaling pathways that regulate TBX3 expression. Here we show that overexpressing TBX3 inhibits proliferative ability while promoting the migration of breast epithelial cells. We demonstrate that the transforming growth factor β1 (TGF-β1) pathway up-regulates TBX3 protein and mRNA levels and show a detailed transcriptional mechanism by which this occurs. Using in vitro and in vivo assays, we show that Smad3/4 and JunB bind and cooperatively regulate TBX3 promoter activity through a Smad-binding element at −67 base pairs. Further, we show that TBX3 plays a pivotal role in mediating the antiproliferative and promigratory role of TGF-β1 in breast epithelial and skin keratinocytes. This study identifies the TGF-β1 signaling pathway as a potentially important player in the regulation of TBX3 in development and cancer.

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  • Although TBX3 promotes migration and invasiveness of cancer cells, it negatively regulates cell proliferation.

    “More recently, it was recognized that although TBX3 promotes migration and invasiveness of cancer cells, it negatively regulates cell proliferation [37, 63].”

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Authors
Li, J., Weinberg, M. S., Zerbini, L., & Prince, S.
Affiliations
  • University of Cape Town (ZA)
  • University of the Witwatersrand (ZA)
Corresponding author
Prince, Sharon
Venue
Molecular Biology of the Cell
Published
2013-11-15
Volume
24
Issue
22
Pages
3569-3576
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2109174791
Cited by
56
References
33
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 2 · 2021: 4 · 2020: 1 · 2019: 7 · 2018: 5 · 2017: 6 · 2016: 8 · 2015: 5 · 2014: 8
FWCI
3.14
Type
journal article
Language
en
Open access
Licence
cc-by-nc-sa
Locations
  • Molecular Biology of the Cell (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Research Foundation
  • South African Medical Research Council
  • Cancer Association of South Africa
  • University of Cape Town
  • Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Kruppel-like factors research
Keywords
TBX3, TGF-β1 signaling, Smad3/4, JunB, transcriptional regulation, breast epithelial cells, keratinocytes, cell migration, cell proliferation, oncogenic transcription factor, Smad binding element, ulnar-mammary syndrome, tumor invasion
MeSH terms
Binding Sites, Cell Line, Cell Movement, Cell Transformation, Neoplastic, Epithelial Cells, Female, Gene Expression Regulation, Humans, Promoter Regions, Genetic, Protein Binding, RNA, Messenger, Skin, Transcription Factors, Transcription, Genetic, Signal Transduction, Keratinocytes, T-Box Domain Proteins, Mammary Glands, Human, Cell Proliferation, Smad3 Protein, Smad4 Protein, Transforming Growth Factor beta1

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