Evidence map›Paper›PMID 28151975›Full record

ArticlePloS one2017

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

Rachel V Purcell, John Pearson, Alan Aitchison, Liane Dixon, Frank A Frizelle, Jacqueline I Keenan

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 129 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
129citing papers in PubMed, 5 pooled it
16.2field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

129 citing papers in PubMed, 5 syntheses or guidelines pooled it, 225 citations in OpenAlex.

  1. Guideline
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  6. Trial
  7. Article
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  10. Orally available designed miniproteins inhibit enterotoxigenicbioRxiv : the preprint server for biology · 2026
    Article
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  15. Annals of medicine and surgery (2012) · 2026
    Article
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69 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Rachel V PurcellDepartment of Surgery, University of Otago Christchurch, Christchurch, New Zealand.ORCID http://orcid.org/0000-0002-2684-4530
John PearsonBiostatistics and Computational Biology Unit, University of Otago Christchurch, Christchurch, New Zealand.
Alan AitchisonDepartment of Surgery, University of Otago Christchurch, Christchurch, New Zealand.
Liane DixonDepartment of Surgery, University of Otago Christchurch, Christchurch, New Zealand.
Frank A FrizelleDepartment of Surgery, University of Otago Christchurch, Christchurch, New Zealand.
Jacqueline I KeenanDepartment of Surgery, University of Otago Christchurch, Christchurch, New Zealand.
University of Otago · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEnterotoxigenic 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.

methodsMucosal 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.

findingsWe 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.

conclusionOur 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.

Indexed as

Bacteroides fragilisAdultAgedAged, 80 and overBacterial ToxinsBacteroides InfectionsColonColorectal NeoplasmsFemaleHumansIntestinal MucosaMaleMetalloendopeptidasesMiddle AgedPolymerase Chain ReactionYoung AdultBacterial ToxinsBacteroides fragilis toxinMetalloendopeptidases

Identifiers

PMID28151975
PMCPMC5289627
OpenAlexW2583680774

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.