Cited by 45NF-κB Signaling PathwaysCytokine Signaling Pathways and InteractionsSignaling Pathways in Disease

Nuclear translocation of STAT3 and NF-κB are independent of each other but NF-κB supports expression and activation of STAT3

Martincuks, Antons, Andryka, Katarzyna, Küster, Andrea, Schmitz-Van de Leur, Hildegard, Komorowski, Michal, Müller-Newen, Gerhard·2017·Cellular Signalling

Abstract

NF-κB and STAT3 are essential transcription factors in immunity and act at the interface of the transition from chronic inflammation to cancer. Different functional crosstalks between NF-κB and STAT3 have been recently described arguing for a direct interaction of both proteins. During a systematic analysis of NF-κB/STAT3 crosstalk we observed that appearance of the subcellular distribution of NF-κB and STAT3 in immunofluorescence heavily depends on the fixation procedure. Therefore, we established an optimized fixation protocol for the reliable simultaneous analysis of the subcellular distributions of both transcription factors. Using this protocol we found that cytokine-induced nuclear accumulation of NF-κB or STAT3 did not alter the subcellular distribution of the other transcription factor. Both knockout and overexpression of STAT3 does not have any major effect on canonical TNFα-NF-κB signalling in MEF or HeLa cells. Similarly, knockout of p65 did not alter nuclear accumulation of STAT3 in response to IL-6. However, p65 expression correlates with elevated total cellular levels of STAT3 and STAT1 and supports activation of these transcription factors. Our findings in MEF cells argue against a direct physical interaction of free cellular NF-κB and STAT3 but point to more intricate functional interactions.

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Crossref · 10.1016/j.cellsig.2017.01.006

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Authors
Martincuks, A., Andryka, K., Küster, A., Schmitz-Van de Leur, H., Komorowski, M., & Müller-Newen, G.
Affiliations
  • RWTH Aachen University (DE)
  • Institute of Fundamental Technological Research (PL)
Venue
Cellular Signalling
Publisher
Elsevier BV
Published
2017-04
Volume
32
Pages
36-47
ISSN
0898-6568 (ISSN-L)
OpenAlex
W2570349166
Cited by
45
References
68
Citations by year
2026: 7 · 2025: 5 · 2024: 6 · 2023: 1 · 2022: 2 · 2021: 8 · 2020: 6 · 2019: 6 · 2018: 3 · 2017: 1
FWCI
1.47
Type
journal article
Language
en
Open access
closed
Locations
  • Cellular Signalling (publishedVersion)
  • PubMed (publishedVersion)
  • RWTH Publications (RWTH Aachen) (submittedVersion)
Funders
Studienstiftung des deutschen Volkes (AM, IZKF)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
Keywords
STAT3, NF-κB, nuclear translocation, transcription factor crosstalk, subcellular localization, interleukin-6, NF-κB p65, STAT1, chronic inflammation and cancer
MeSH terms
Animals, Cell Nucleus, Gene Expression Regulation, HeLa Cells, Humans, Tumor Necrosis Factor-alpha, NF-kappa B, Protein Transport, STAT1 Transcription Factor, STAT3 Transcription Factor, STAT5 Transcription Factor, Mice, Transcription Factor RelA

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