Evidence map›Paper›PMID 29335008›Full record

ArticleMicrobiome2018

Multi-omics differentially classify disease state and treatment outcome in pediatric Crohn's disease.

Gavin M Douglas, Richard Hansen, Casey M A Jones, Katherine A Dunn, André M Comeau, Joseph P Bielawski, Rachel Tayler, Emad M El-Omar, Richard K Russell, Georgina L Hold and 2 more

Open access · goldAbstract readComparative Study
In one paragraph

Article in Microbiome, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed, 3 pooled it
11.8field-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

64 citing papers in PubMed, 3 syntheses or guidelines pooled it, 127 citations in OpenAlex.

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4 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

12 authors at 4 institutions in 3 countries.

Gavin M DouglasDepartment of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada.
Richard HansenDepartment of Paediatric Gastroenterology, Royal Hospital for Children, Glasgow, UK.
Casey M A JonesDepartment of Pharmacology, Dalhousie University, Halifax, NS, Canada.
Katherine A DunnDepartment of Biology, Dalhousie University, Halifax, NS, Canada.
André M ComeauCGEB-Integrated Microbiome Resource (IMR), Dalhousie University, Halifax, NS, Canada.
Joseph P BielawskiDepartment of Biology, Dalhousie University, Halifax, NS, Canada.
Rachel TaylerDepartment of Paediatric Gastroenterology, Royal Hospital for Children, Glasgow, UK.
Emad M El-OmarDepartment of Medicine, St George and Sutherland Clinical School, UNSW, Sydney, NSW, Australia.
Richard K RussellDepartment of Paediatric Gastroenterology, Royal Hospital for Children, Glasgow, UK.
Georgina L HoldDepartment of Medicine, St George and Sutherland Clinical School, UNSW, Sydney, NSW, Australia.
Morgan G I LangilleDepartment of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada. morgan.g.i.langille@dal.ca.
Johan Van LimbergenDepartment of Pediatrics, Dalhousie University, Halifax, NS, Canada.
Dalhousie University · CARoyal Hospital for Children · GBSutherland Hospital · AUUNSW Sydney · AU

Funding

Clinical Academic Fellowship from the Chief Scientist Office (Scotland) CAF/08/01
6 · The paper itself

Abstract

backgroundCrohn's disease (CD) has an unclear etiology, but there is growing evidence of a direct link with a dysbiotic microbiome. Many gut microbes have previously been associated with CD, but these have mainly been confounded with patients' ongoing treatments. Additionally, most analyses of CD patients' microbiomes have focused on microbes in stool samples, which yield different insights than profiling biopsy samples.

resultsWe sequenced the 16S rRNA gene (16S) and carried out shotgun metagenomics (MGS) from the intestinal biopsies of 20 treatment-naïve CD and 20 control pediatric patients. We identified the abundances of microbial taxa and inferred functional categories within each dataset. We also identified known human genetic variants from the MGS data. We then used a machine learning approach to determine the classification accuracy when these datasets, collapsed to different hierarchical groupings, were used independently to classify patients by disease state and by CD patients' response to treatment. We found that 16S-identified microbes could classify patients with higher accuracy in both cases. Based on follow-ups with these patients, we identified which microbes and functions were best for predicting disease state and response to treatment, including several previously identified markers. By combining the top features from all significant models into a single model, we could compare the relative importance of these predictive features. We found that 16S-identified microbes are the best predictors of CD state whereas MGS-identified markers perform best for classifying treatment response.

conclusionsWe demonstrate for the first time that useful predictors of CD treatment response can be produced from shotgun MGS sequencing of biopsy samples despite the complications related to large proportions of host DNA. The top predictive features that we identified in this study could be useful for building an improved classifier for CD and treatment response based on sufferers' microbiome in the future. The BISCUIT project is funded by a Clinical Academic Fellowship from the Chief Scientist Office (Scotland)-CAF/08/01.

Indexed as

Genetic VariationAdolescentChildChild, PreschoolCrohn DiseaseDNA, BacterialDNA, RibosomalDysbiosisFecesFemaleGenetic Predisposition to DiseaseHumansMachine LearningMaleMetagenomicsRNA, Ribosomal, 16SDNA, BacterialDNA, RibosomalRNA, Ribosomal, 16SCrohn’s diseaseMachine learningMicrobiomePediatricTreatment-naïveTreatment response

Identifiers

PMID29335008
PMCPMC5769311
OpenAlexW2783861641

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.