Cited by 230Colorectal Cancer Screening and DetectionGut microbiota and healthClostridium difficile and Clostridium perfringens research

Colonization with enterotoxigenic Bacteroides fragilis is associated with early-stage colorectal neoplasia

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Purcell, Rachel V., Pearson, John, Aitchison, Alan, Dixon, Liane, Frizelle, Frank A., Keenan, Jacqueline I.·2017·PLoS ONE

Abstract

BACKGROUND: Enterotoxigenic Bacteroides fragilis (ETBF) is a toxin-producing bacteria thought to possibly promote colorectal carcinogenesis by modulating the mucosal immune response and inducing epithelial cell changes. Here, we aim to examine the association of colonic mucosal colonization with ETBF and the presence of a range of lesions on the colonic neoplastic spectrum. METHODS: Mucosal tissue from up to four different colonic sites was obtained from a consecutive series of 150 patients referred for colonoscopy. The presence and relative abundance of the B. fragilis toxin gene (bft) in each tissue sample was determined using quantitative PCR, and associations with clinicopathological characteristics were analysed. FINDINGS: We found a high concordance of ETBF between different colonic sites (86%). Univariate analysis showed statistically significant associations between ETBF positivity and the presence of low-grade dysplasia (LGD), tubular adenomas (TA), and serrated polyps (P-values of 0.007, 0.027, and 0.007, respectively). A higher relative abundance of ETBF was significantly associated with LGD and TA (P-values of < 0.0001 and 0.025, respectively). Increased ETBF positivity and abundance was also associated with left-sided biopsies, compared to those from the right side of the colon. CONCLUSION: Our results showing association of ETBF positivity and increased abundance with early-stage carcinogenic lesions underlines its importance in the development of colorectal cancer, and we suggest that detection of ETBF may be a potential marker of early colorectal carcinogenesis.

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  • Higher proportions of patients with familial adenomatous polyposis or sporadic premalignant lesions had intestinal mucosa positive for enterotoxigenic Bacteroides fragilis than controls.

    “Higher proportions of patients with familial adenomatous polyposis42 or sporadic premalignant lesions had intestinal mucosa that tested positive for ETBF than of controls.41”

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  1. [2]Ministry of Health N. Selected Cancer 2012, 2013, 2014. In: Health Mo, editor. Wellington 2015.

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Authors
Purcell, R. V., Pearson, J., Aitchison, A., Dixon, L., Frizelle, F. A., & Keenan, J. I.
Affiliations
University of Otago (NZ)
Corresponding author
Purcell, Rachel V.
Venue
PLoS ONE
Published
2017-02-02
Volume
12
Issue
2
Pages
e0171602
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2583680774
Cited by
230
References
30
Citations by year
2026: 18 · 2025: 21 · 2024: 20 · 2023: 27 · 2022: 28 · 2021: 27 · 2020: 36 · 2019: 31 · 2018: 18 · 2017: 4
FWCI
10.73
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Topics
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Screening and Detection
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Infectious Diseases › Clostridium difficile and Clostridium perfringens research
Keywords
enterotoxigenic Bacteroides fragilis, colorectal neoplasia, colorectal carcinogenesis, low-grade dysplasia, tubular adenoma, serrated polyps, left-sided colon
MeSH terms
Adult, Aged, Aged, 80 and over, Bacterial Toxins, Bacteroides fragilis, Bacteroides Infections, Colon, Female, Humans, Intestinal Mucosa, Male, Metalloendopeptidases, Middle Aged, Colorectal Neoplasms, Polymerase Chain Reaction, Young Adult

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