Cited by 75Salmonella and Campylobacter epidemiologyCancer Research and TreatmentsHelicobacter pylori-related gastroenterology studies

Presence of Salmonella AvrA in colorectal tumor and its precursor lesions in mouse intestine and human specimens

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Lu, Rong, Bosland, Maarten, Xia, Yinglin, Zhang, Yong-guo, Kato, Ikuko, Sun, Jun·2017·Oncotarget

Abstract

// Rong Lu 1 , Maarten Bosland 2 , Yinglin Xia 1, 3 , Yong-guo Zhang 1 , Ikuko Kato 4 and Jun Sun 1 1 Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA 2 Department of Pathology, University of Illinois at Chicago, Chicago, IL, USA 3 Division of Academic Internal Medicine and Geriatrics, Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA 4 Department of Oncology and Pathology, Wayne State University School of Medicine, Detroit, MI, USA Correspondence to: Jun Sun, email: junsun7@uic.edu Ikuko Kato, email: katoi@karmanos.org Keywords: colorectal cancer, inflammation, infection, IBD, Salmonella Received: April 19, 2017 Accepted: June 26, 2017 Published: July 06, 2017 ABSTRACT Evidence directly supporting an association between Salmonella infection and colorectal cancer in human subjects is sparse. It has been well recognized that Salmonella infection increases the risk of gallbladder cancer. AvrA, a bacterial protein from Salmonella enterica, plays a crucial role in establishing chronic infection. To our knowledge, the presence of the bacterial AvrA has never been studied in human samples. Here, we demonstrated the presence and cellular localization of AvrA in inflamed, colorectal tumor and its precursor lesions, using both animal experimental infection models and human clinical specimens. We performed a newly developed AvrA serological assay and to determine the presence of anti- Salmonella AvrA antibody in chronic infected mouse serum samples. Further, we tested the presence of AvrA gene in healthy human fecal samples, in order to advance etiological studies of Salmonella AvrA in human population. Our study suggests a potential role of this bacterial protein in human colorectal cancer. Moreover, our new serological assay may serve a useful tool to identify individuals at increased risk for colorectal cancer.

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  • Immunohistochemistry showed more AvrA protein in pre-cancerous colon tissue than in normal colon or tumor tissue.

    “Expression of AvrA protein, detected by immunohistochemistry, was significantly higher in pre-cancer colon tissues than in normal human colon or tumor tissues, based on pathology differences.181”

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  1. [42]Liu X Lu R Wu S Sun J Salmonella regulation of intestinal stem cells through the Wnt/beta-catenin pathway FEBS Lett 2010 584 911 6 https://doi.org/10.1016/j.febslet.2010.01.024 20083111 PMC2829849 · DOI

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Authors
Lu, R., Bosland, M., Xia, Y., Zhang, Y.-G., Kato, I., & Sun, J.
Affiliations
  • University of Illinois Chicago (US)
  • Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
  • Wayne State University (US)
Venue
Oncotarget
Published
2017-07-06
Volume
8
Issue
33
Pages
55104-55115
ISSN
1949-2553 (ISSN-L)
OpenAlex
W2731914191
Cited by
75
References
49
Citations by year
2026: 6 · 2025: 4 · 2024: 9 · 2023: 13 · 2022: 9 · 2021: 11 · 2020: 9 · 2019: 6 · 2018: 8
FWCI
7.08
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Oncotarget (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK105118)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Salmonella and Campylobacter epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Cancer Research and Treatments
  • Health Sciences › Medicine › Surgery › Helicobacter pylori-related gastroenterology studies
Keywords
Salmonella enterica, colorectal cancer, inflammation-associated cancer, inflammatory bowel disease, fecal samples, mouse infection model, cancer risk identification

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