Cited by 155Helicobacter pylori-related gastroenterology studiesCytokine Signaling Pathways and InteractionsGastric Cancer Management and Outcomes

Helicobacter pylori Cytotoxin-Associated Gene A Activates the Signal Transducer and Activator of Transcription 3 Pathway In vitro and In vivo

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Bronte-Tinkew, Dana M., Terebiznik, Mauricio, Franco, Aime, Ang, Michelle, Ahn, Diane, Mimuro, Hitomi, Sasakawa, Chihiro, Ropeleski, Mark J. +2 more·2009·Cancer Research

Published version of a preprint

Abstract

Persistent infection with Helicobacter pylori confers an increased risk for the development of gastric cancer. However, the exact mechanisms whereby this bacterium causes carcinogenesis have not been completely elucidated. Recent evidence indicates that aberrant activation of the signal transducers and activators of transcription 3 (STAT3) signaling pathway may play a role in gastric carcinogenesis. Therefore, we hypothesized that H. pylori infection modulates STAT3 signaling, favoring gastric cancer development. In epithelial cells infected with H. pylori, STAT3 was activated, as assessed by immunoblotting for phosphorylated STAT3, immunofluorescence of translocated STAT3, fluorescence recovery after photobleaching, and luciferase activation in transfected cells. Activation was dependent on translocation but not phosphorylation of cytotoxin-associated gene A (CagA) in host cells. Activation seemed to be receptor-mediated because preincubation of cells with the interleukin-6 (IL-6) receptor superantagonist sant7 or inhibition of gp130 by a monoclonal antibody prevented H. pylori–mediated STAT3 activation. However, activation was not related to autocrine activation by IL-6 or IL-11. CagA+ wild-type H. pylori, but not the noncarcinogenic cagA− mutant, activated STAT3 in gastric epithelial cells in vivo in the gerbil model of H. pylori–mediated gastric carcinogenesis. Collectively, these results indicate that H. pylori CagA activates the STAT3 signaling pathway in vitro and in vivo, providing a potential mechanism by which chronic H. pylori infection promotes the development of gastric cancer. [Cancer Res 2009;69(2):632–9]

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  • Helicobacter pylori, which induces gastritis and is related to gastric cancer, activates STAT3 in epithelial cells.

    “Helicobacter pylori, which induces gastritis and is related to gastric cancer, activates STAT3 in epithelial cells (327).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [327]

    The Abstract reports STAT3 activation in H. pylori-infected epithelial cells, and the Discussion identifies H. pylori as a major risk factor for gastric cancer. Our copy discusses gastric inflammation but does not explicitly state that H. pylori induces gastritis, so that part of the sentence is not verified. (LLM, conf=0.83)

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Authors
Bronte-Tinkew, D. M., Terebiznik, M., Franco, A., Ang, M., Ahn, D., Mimuro, H., Sasakawa, C., Ropeleski, M. J., Peek, R. M., & Jones, N. L.
Affiliations
  • University of Toronto (CA)
  • Vanderbilt University (US)
  • Institute of Medical Science, The University of Tokyo (JP)
  • Queen's University (CA)
Venue
Cancer Research
Published
2009-01-15
Volume
69
Issue
2
Pages
632-639
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2117113786
Cited by
154
References
33
Citations by year
2026: 7 · 2025: 9 · 2024: 8 · 2023: 14 · 2022: 7 · 2021: 6 · 2020: 10 · 2019: 5 · 2018: 6 · 2017: 8 · 2016: 11 · 2015: 8 · 2014: 11 · 2013: 13 · 2012: 13
FWCI
10.48
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (R29CA077955, CA-77955, R01CA077955)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-73902, R01DK058587, DK-58587, R01DK073902)
Topics
  • Health Sciences › Medicine › Surgery › Helicobacter pylori-related gastroenterology studies
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Gastric Cancer Management and Outcomes
Keywords
Helicobacter pylori, CagA, cytotoxin-associated gene A, STAT3 signaling, gastric carcinogenesis, gp130, IL-6 receptor, interleukin-11, chronic infection, gastric epithelial cells, gerbil model
MeSH terms
Adenocarcinoma, Animals, Antigens, Bacterial, Bacterial Proteins, Cell Nucleus, Gerbillinae, HeLa Cells, Humans, Male, Phosphorylation, Stomach Neoplasms, Transcription, Genetic, Tyrosine, Helicobacter pylori, Helicobacter Infections, Receptors, Interleukin-6, Cell Line, Tumor, STAT3 Transcription Factor, Cytokine Receptor gp130

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