Cited by 39Cytokine Signaling Pathways and InteractionsGenomics and Chromatin DynamicsNF-κB Signaling Pathways

STAT3 acts through pre-existing nucleosome-depleted regions bound by FOS during an epigenetic switch linking inflammation to cancer

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Fleming, Joseph D, Giresi, Paul G, Lindahl-Allen, Marianne, Krall, Elsa B, Lieb, Jason D, Struhl, Kevin·2015·Epigenetics & Chromatin

Abstract

BACKGROUND: Transient induction of the Src oncoprotein in a non-transformed breast cell line can initiate an epigenetic switch to a cancer cell via a positive feedback loop that involves activation of the signal transducer and activator of transcription 3 protein (STAT3) and NF-κB transcription factors. RESULTS: We show that during the transformation process, nucleosome-depleted regions (defined by formaldehyde-assisted isolation of regulatory elements (FAIRE)) are largely unchanged and that both before and during transformation, STAT3 binds almost exclusively to previously open chromatin regions. Roughly, a third of the transformation-inducible genes require STAT3 for the induction. STAT3 and NF-κB appear to drive the regulation of different gene sets during the transformation process. Interestingly, STAT3 directly regulates the expression of NFKB1, which encodes a subunit of NF-κB, and IL6, a cytokine that stimulates STAT3 activity. Lastly, many STAT3 binding sites are also bound by FOS and the expression of several AP-1 factors is altered during transformation in a STAT3-dependent manner, suggesting that STAT3 may cooperate with AP-1 proteins. CONCLUSIONS: These observations uncover additional complexities to the inflammatory feedback loop that are likely to contribute to the epigenetic switch. In addition, gene expression changes during transformation, whether driven by pre-existing or induced transcription factors, occur largely through pre-existing nucleosome-depleted regions.

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  • This provides a strong link between pro-inflammatory immune factors, body growth through activation of the mTOR pathway and uncontrolled proliferation typical of cancer-related disease.

    “This provides a strong link between pro-inflammatory immune factors, body growth through activation of the mTOR pathway and uncontrolled proliferation typical of cancer-related disease [150, 151–153].”

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Authors
Fleming, J. D., Giresi, P. G., Lindahl-Allen, M., Krall, E. B., Lieb, J. D., & Struhl, K.
Affiliations
  • Harvard University (US)
  • University of Chicago (US)
Corresponding author
  • Fleming, Joseph D
  • Giresi, Paul G
  • Lindahl-Allen, Marianne
  • Lieb, Jason D
  • Struhl, Kevin
Venue
Epigenetics & Chromatin
Published
2015-02-14
Volume
8
Issue
1
Pages
7-7
ISSN
1756-8935 (ISSN-L)
OpenAlex
W2168351521
Cited by
39
References
35
Citations by year
2026: 3 · 2025: 1 · 2023: 2 · 2022: 2 · 2021: 5 · 2020: 6 · 2019: 6 · 2018: 6 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 1
FWCI
1.89
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Epigenetics & Chromatin (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
  • Hope Funds for Cancer Research (HFCR-11-03-03)
  • National Institutes of Health
  • National Cancer Institute (R01CA107486)
Topics
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
Keywords
STAT3, FOS, AP-1, nucleosome-depleted regions, open chromatin, epigenetic switch, NF-κB, NFKB1, interleukin-6, transcription factor binding sites, FAIRE, positive feedback loop

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