Cited by 488Cytokine Signaling Pathways and InteractionsProtein Kinase Regulation and GTPase SignalingProtein Tyrosine Phosphatases

Stat3-mediated Myc expression is required for Src transformation and PDGF-induced mitogenesis

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Bowman, Tammy, Broome, Martin A., Sinibaldi, Dominic, Wharton, Walker, Pledger, W. J., Sedivy, John M., Irby, Rosalyn, Yeatman, Timothy +2 more·2001·Proceedings of the National Academy of Sciences

Abstract

Signal transducer and activator of transcription (STAT) proteins perform key roles in mediating signaling by cytokines and growth factors, including platelet-derived growth factor (PDGF). In addition, Src family kinases activate STAT signaling and are required for PDGF-induced mitogenesis in normal cells. One STAT family member, Stat3, has been shown to have an essential role in cell transformation by the Src oncoprotein. However, the mechanisms by which STAT-signaling pathways contribute to mitogenesis and transformation are not fully defined. We show here that disruption of Stat3 signaling by using dominant-negative Stat3β protein in NIH 3T3 fibroblasts suppresses c-Myc expression concomitant with inhibition of v-Src-induced transformation. Ectopic expression of c-Myc is able to partially reverse this inhibition, suggesting that c-Myc is a downstream effector of Stat3 signaling in v-Src transformation. Furthermore, c -myc gene knockout fibroblasts are refractory to transformation by v-Src, consistent with a requirement for c-Myc protein in v-Src transformation. In normal NIH 3T3 cells, disruption of Stat3 signaling with dominant-negative Stat3β protein inhibits PDGF-induced mitogenesis in a manner that is reversed by ectopic c-Myc expression. Moreover, inhibition of Src family kinases with the pharmacologic agent, SU6656, blocks Stat3 activation by PDGF. These findings, combined together, delineate the signaling pathway, PDGF → Src → Stat3 → Myc, that is important in normal PDGF-induced mitogenesis and subverted in Src transformation.

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Crossref · 10.1073/pnas.131568898

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  • The STAT3 target gene MYC is a potent promoter of cell growth and is required for Src-mediated cellular transformation via STAT3.

    “In addition, the STAT3 target gene MYC, which itself encodes a transcription factor, is also a potent promoter of cell growth and is required for Src-mediated cellular transformation via STAT3.45”

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Research works printed but not linked: 4

  1. [8]Garcia R, Yu C L, Hudnall A, Catlett R, Nelson K L, Smithgall T, Fujita D J, Ethier S P, Jove R. Cell Growth Differ. 1997;8:1267–1276. [PubMed] [Google Scholar]
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Authors
Bowman, T., Broome, M. A., Sinibaldi, D., Wharton, W., Pledger, W. J., Sedivy, J. M., Irby, R., Yeatman, T., Courtneidge, S. A., & Jove, R.
Affiliations
  • University of South Florida (US)
  • Pfizer (United States) (US)
Venue
Proceedings of the National Academy of Sciences
Published
2001-06-12
Volume
98
Issue
13
Pages
7319-7324
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2042794591
Cited by
488
References
54
Citations by year
2026: 2 · 2025: 9 · 2024: 8 · 2023: 24 · 2022: 12 · 2021: 13 · 2020: 12 · 2019: 13 · 2018: 13 · 2017: 20 · 2016: 15 · 2015: 24 · 2014: 21 · 2013: 20 · 2012: 30
FWCI
11.53
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Moffitt Cancer Center
  • National Cancer Institute (R01CA055652, CA-55652, CA 67360, R01CA067360)
Topics
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
STAT3, c-Myc, v-Src, Src family kinases, platelet-derived growth factor, cell transformation, SU6656, STAT signaling, NIH3T3 cells, oncogenic transformation
MeSH terms
Animals, Cell Division, Cell Line, Transformed, Cell Transformation, Neoplastic, DNA-Binding Proteins, Gene Expression Regulation, Models, Biological, Platelet-Derived Growth Factor, Recombinant Proteins, Signal Transduction, Trans-Activators, Genes, myc, Proto-Oncogene Proteins c-myc, Genes, src, 3T3 Cells, STAT3 Transcription Factor, Mice

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