Habitual dietary fibre intake influences gut microbiota response to an inulin-type fructan prebiotic: a randomised, double-blind, placebo-controlled, cross-over, human intervention study
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Study information
-
Quality control
- Retracted paper
- Contamination issues suspected
- Batch effect issues suspected
- Uncontrolled confounding suspected
- Results are suspect (various reasons)
- Tags applied
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
URI
Authors
Healey G, Murphy R, Butts C, Brough L, Whelan K, Coad J
Journal
The British journal of nutrition
Year
2018
Keywords:
HDF high dietary fibre; LDF low dietary fibre, 16S rRNA gene sequencing, Gut microbiota, Habitual dietary fibres, Inulin-type fructan prebiotics, Responsiveness
Dysbiotic gut microbiota have been implicated in human disease. Diet-based therapeutic strategies have been used to manipulate the gut microbiota towards a more favourable profile. However, it has been demonstrated that large inter-individual variability exists in gut microbiota response to a dietary intervention. The primary objective of this study was to investigate whether habitually low dietary fibre (LDF) v. high dietary fibre (HDF) intakes influence gut microbiota response to an inulin-type fructan prebiotic. In this randomised, double-blind, placebo-controlled, cross-over study, thirty-four healthy participants were classified as LDF or HDF consumers. Gut microbiota composition (16S rRNA bacterial gene sequencing) and SCFA concentrations were assessed following 3 weeks of daily prebiotic supplementation (Orafti® Synergy 1; 16 g/d) or placebo (Glucidex® 29 Premium; 16 g/d), as well as after 3 weeks of the alternative intervention, following a 3-week washout period. In the LDF group, the prebiotic intervention led to an increase in Bifidobacterium (P=0·001). In the HDF group, the prebiotic intervention led to an increase in Bifidobacterium (P<0·001) and Faecalibacterium (P=0·010) and decreases in Coprococcus (P=0·010), Dorea (P=0·043) and Ruminococcus (Lachnospiraceae family) (P=0·032). This study demonstrates that those with HDF intakes have a greater gut microbiota response and are therefore more likely to benefit from an inulin-type fructan prebiotic than those with LDF intakes. Future studies aiming to modulate the gut microbiota and improve host health, using an inulin-type fructan prebiotic, should take habitual dietary fibre intake into account.
Statistical test
ANOVA
Experiment 1
Reviewed Marked as Reviewed by Atrayees on 2023-6-29
Subjects
- Location of subjects
- New Zealand
- Host species Species from which microbiome was sampled (if applicable)
- Homo sapiens
- Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology
- Feces Cow dung,Cow pat,Droppings,Dung,Excrement,Excreta,Faeces,Fecal material,Fecal matter,Fewmet,Frass,Guano,Matières fécales@fr,Merde@fr,Ordure,Partie de la merde@fr,Piece of shit,Porción de mierda@es,Portion of dung,Portion of excrement,Portion of faeces,Portion of fecal material,Portion of fecal matter,Portion of feces,Portion of guano,Portion of scat,Portionem cacas,Scat,Spoor,Spraint,Stool,Teil der fäkalien@de,Feces
- Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
- diet Dietary,Diets,diet
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- prebiotic (inulin-type fructan)
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- placebo
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- placebo (control for prebiotic intake - representing lower fiber group)
- Group 0 sample size Number of subjects in the control (unexposed) group
- 34
- Group 1 sample size Number of subjects in the case (exposed) group
- 33
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- 6 months
Lab analysis
- Sequencing type
- 16S
- 16S variable region One or more hypervariable region(s) of the bacterial 16S gene
- V3-V4
- Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance
- Illumina
Statistical Analysis
- Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
- relative abundances
- Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
- 0.05
- MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?
- No
- Matched on Factors on which subjects have been matched on in a case-control study
- age, body mass index, sex
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
Signature 1
Needs review
Source: Text, Table 4, Figure 5, and Figure 7
Description: Mean genus level changes after the prebiotic intervention between the low and high dietary fibre groups.
Abundance in Group 1: increased abundance in placebo
| NCBI | Quality Control | Links |
|---|---|---|
| Bacillota | ||
| Coprococcus | ||
| Dorea | ||
| Oscillospira | ||
| Lachnospiraceae |
Revision editor(s): WikiWorks
Signature 2
Needs review
Source: Text, Table 4, Figure 5, and Figure 7
Description: Mean genus level changes after the prebiotic intervention between the low and high dietary fibre groups.
Abundance in Group 1: decreased abundance in placebo
| NCBI | Quality Control | Links |
|---|---|---|
| Actinomycetota | ||
| Bifidobacterium |
Revision editor(s): WikiWorks
Experiment 2
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- prebiotic (inulin-type fructan) - in participants with low dietary fiber
Lab analysis
Statistical Analysis
- Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
- Not specified
- Matched on Factors on which subjects have been matched on in a case-control study
- age, sex, body mass index
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
Signature 1
Needs review
Source: Text, Table 4, Figure 5, and Figure 7
Description: Mean genus level changes after the prebiotic intervention between the low and high dietary fibre groups.
Abundance in Group 1: decreased abundance in placebo
| NCBI | Quality Control | Links |
|---|---|---|
| Bifidobacterium |
Revision editor(s): WikiWorks
Experiment 3
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- prebiotic (inulin-type fructan) - in participants with high dietary fiber
Lab analysis
Statistical Analysis
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
Signature 1
Needs review
Source: Text, Table 4, Figure 5, and Figure 7
Description: Mean genus level changes after the prebiotic intervention between the low and high dietary fibre groups.
Abundance in Group 1: increased abundance in placebo
| NCBI | Quality Control | Links |
|---|---|---|
| Blautia | ||
| Coprococcus | ||
| Dorea |
Revision editor(s): WikiWorks
Signature 2
Needs review
Source: Text, Table 4, Figure 5, and Figure 7
Description: Mean genus level changes after the prebiotic intervention between the low and high dietary fibre groups.
Abundance in Group 1: decreased abundance in placebo
| NCBI | Quality Control | Links |
|---|---|---|
| Bifidobacterium |
Revision editor(s): WikiWorks
Experiment 4
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- high dietary fiber
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- low dietary fiber
Lab analysis
Statistical Analysis
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Chao1 Abundance-based estimator of species richness
- unchanged
Signature 1
Needs review
Source: Text, Table 4, Figure 5, and Figure 7
Description: Mean genus level changes after the prebiotic intervention between the low and high dietary fibre groups.
Abundance in Group 1: decreased abundance in low dietary fiber
| NCBI | Quality Control | Links |
|---|---|---|
| Faecalibacterium |
Revision editor(s): WikiWorks
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