Evidence map›Paper›PMID 25844959›Full record

SynthesisInflammatory bowel diseases2015

Recent advances in characterizing the gastrointestinal microbiome in Crohn's disease: a systematic review.

Emily K Wright, Michael A Kamm, Shu Mei Teo, Michael Inouye, Josef Wagner, Carl D Kirkwood

Open access · bronzeAbstract readSystematic Review
In one paragraph

Synthesis in Inflammatory bowel diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 127 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
127citing papers in PubMed, 2 pooled it
19.0field-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

127 citing papers in PubMed, 2 syntheses or guidelines pooled it, 198 citations in OpenAlex.

  1. Changes in Gut Microbiota and Multiple Sclerosis: A Systematic Review.International journal of environmental research and public health · 2023
    Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Gut microbiota in treatment-naïve active Crohn's disease compared to those in remission: Divergent trends in mucosal versus fecal bacterial community.Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology · 2026
    Article
  6. Article
  7. Disrupted terminal bilirubin catabolism linksFrontiers in microbiology · 2026
    Article
  8. Review
  9. Article
  10. Article
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  16. Article
  17. In Vitro Acid Resistance of PathogenicGastro hep advances · 2025
    Article
  18. Article
  19. Review
  20. Article

67 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 4 institutions in 3 countries.

Emily K Wright*Department of Gastroenterology, St Vincent's Hospital Melbourne, Australia; †Department of Pathology, University of Melbourne, Australia; ‡Imperial College, London, United Kingdom; and §Enteric Virus Group, Murdoch Children's Research Institute, Melbourne, Australia.
Michael A Kamm
Shu Mei Teo
Michael Inouye
Josef Wagner
Carl D Kirkwood
Imperial College London · GBMurdoch Children's Research Institute · AUSt Vincent's Hospital · AUUniversity of Melbourne · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe intestinal microbiota is involved in the pathogenesis of inflammatory bowel disease. A reduction in the diversity of the intestinal microbiota as well as specific taxonomic and functional shifts have been reported in Crohn's disease and may play a central role in the inflammatory process. The aim was to systematically review recent developments in the structural and functional changes observed in the gastrointestinal microbiome in patients with Crohn's Disease.

resultsSeventy-two abstracts were included in this review. The effects of host genetics, disease phenotype, and inflammatory bowel disease treatment on the gastrointestinal microbiome in Crohn's disease were reviewed, and taxonomic shifts in patients with early and established disease were described. The relative abundance of Bacteroidetes is increased and Firmicutes decreased in Crohn's disease compared with healthy controls. Enterobacteriaceae, specifically Eschericia coli, is enriched in Crohn's disease. Faecalibacterium prausnitzii is found at lower abundance in Crohn's disease and in those with postoperative recurrence. Observed functional changes include major shifts in oxidative stress pathways, a decrease in butanoate and propanoate metabolism gene expression, lower levels of butyrate, and other short-chain fatty acids, decreased carbohydrate metabolism, and decreased amino acid biosynthesis.

conclusionsChanges in microbial composition and function have been described, although a causative role remains to be established. Larger, prospective, and longitudinal studies are required with deep interrogation of the microbiome if causality is to be determined, and refined microbial manipulation is to emerge as a focused therapy.

Indexed as

Gastrointestinal MicrobiomeBacillotaBacteroidetesCrohn DiseaseEscherichia coliHumans

Identifiers

PMID25844959
PMCPMC4450900
OpenAlexW2321988955

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.