Evidence map›Paper›PMID 39227818›Full record

Trial reportBMC medicine2024

Effects of fructan and gluten on gut microbiota in individuals with self-reported non-celiac gluten/wheat sensitivity-a randomised controlled crossover trial.

Anne Mari Herfindal, Morten Nilsen, Trude E Aspholm, Gry I G Schultz, Jørgen Valeur, Knut Rudi, Magne Thoresen, Knut E A Lundin, Christine Henriksen, Siv K Bøhn

Registry-linked trialAbstract readRandomized Controlled Trial
In one paragraph

Trial report in BMC medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02464150 (Gluten Challenge in Celiac Disease), which is not on this map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
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.

NCT02464150 nacompletednot on this map

Gluten Challenge in Celiac Disease

TypeinterventionalSponsorOslo University HospitalRan2017 to 2025Enrolled99ConditionsCeliac DiseaseArmsGluten challenge
3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Review
  6. Review
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  8. Review
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

10 authors.

Anne Mari HerfindalFaculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
Morten NilsenFaculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
Trude E AspholmFaculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
Gry I G SchultzHealthy Life Centre, Municipality of Nes, Norway.
Jørgen ValeurUnger-Vetlesen Institute, Lovisenberg Diaconal Hospital, Oslo, Norway.
Knut RudiFaculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway.
Magne ThoresenDepartment of Biostatistics, Faculty of Medicine, University of Oslo, Oslo, Norway.
Knut E A LundinDisease Research Centre, Norwegian Coeliac, University of Oslo, Oslo, Norway.
Christine HenriksenDepartment of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.
Siv K BøhnFaculty of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, P. O. Box 5003, N-1432, Ås, Norway. sivb@nmbu.no.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIndividuals with non-celiac gluten/wheat sensitivity (NCGWS) experience improvement in gastrointestinal symptoms following a gluten-free diet. Although previous results have indicated that fructo-oligosaccharides (FOS), a type of short-chain fructans, were more likely to induce symptoms than gluten in self-reported NCGWS patients, the underlying mechanisms are unresolved.

methodsOur main objective was therefore to investigate whether FOS-fructans and gluten affect the composition and diversity of the faecal microbiota (16S rRNA gene sequencing), faecal metabolites of microbial fermentation (short-chain fatty acids [SCFA]; gas chromatography with flame ionization detector), and a faecal biomarker of gut inflammation (neutrophil gelatinase-associated lipocalin, also known as lipocalin 2, NGAL/LCN2; ELISA). In the randomised double-blind placebo-controlled crossover study, 59 participants with self-reported NCGWS underwent three different 7-day diet challenges with gluten (5.7 g/day), FOS-fructans (2.1 g/day), and placebo separately (three periods, six challenge sequences).

resultsThe relative abundances of certain bacterial taxa were affected differently by the diet challenges. After the FOS-fructan challenge, Fusicatenibacter increased, while Eubacterium (E.) coprostanoligenes group, Anaerotruncus, and unknown Ruminococcaceae genera decreased. The gluten challenge was primarily characterized by increased abundance of Eubacterium xylanophilum group. However, no differences were found for bacterial diversity (α-diversity), overall bacterial community structure (β-diversity), faecal metabolites (SCFA), or NGAL/LCN2. Furthermore, gastrointestinal symptoms in response to FOS-fructans were generally not linked to substantial shifts in the gut bacterial community. However, the reduction in E. coprostanoligenes group following the FOS-fructan challenge was associated with increased gastrointestinal pain. Finally, correlation analysis revealed that changes in gastrointestinal symptoms following the FOS-fructan and gluten challenges were linked to varying bacterial abundances at baseline.

conclusionsIn conclusion, while FOS-fructans induced more gastrointestinal symptoms than gluten in the NCGWS patients, we did not find that substantial shifts in the composition nor function of the faecal microbiota could explain these differences in the current study. However, our results indicate that individual variations in baseline bacterial composition/function may influence the gastrointestinal symptom response to both FOS-fructans and gluten. Additionally, the change in E. coprostanoligenes group, which was associated with increased symptoms, implies that attention should be given to these bacteria in future trials investigating the impact of dietary treatments on gastrointestinal symptoms.

trial registrationClinicaltrials.gov as NCT02464150.

Indexed as

Cross-Over StudiesFecesFructansGastrointestinal MicrobiomeGlutensAdultDouble-Blind MethodFemaleHumansMaleMiddle AgedOligosaccharidesWheat HypersensitivityYoung AdultFructansGlutensOligosaccharidesFODMAPFructanFructo-oligosaccharides (FOS)Gastrointestinal symptomsGlutenGut microbiotaLipocalin-2 (LCN2)Neutrophil gelatinase-associated lipocalin (NGAL)Non-celiac gluten/wheat sensitivity (NCGWS)Short-chain fatty acids (SCFA)

Identifiers

PMID39227818
PMCPMC11373345

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
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Registered trials

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 Socratic graph.