Evidence map›Paper›PMID 32665665›Full record

ArticleScientific reports2020

Bifidobacterial biofilm formation is a multifactorial adaptive phenomenon in response to bile exposure.

Sandra M Kelly, Noreen Lanigan, Ian J O'Neill, Francesca Bottacini, Gabriele Andrea Lugli, Alice Viappiani, Francesca Turroni, Marco Ventura, Douwe van Sinderen

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
5.9field-weighted citation impact, top 4% 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

35 citing papers in PubMed, 58 citations in OpenAlex.

  1. Review
  2. Review
  3. Review
  4. Review
  5. Host-associatedCurrent research in food science · 2026
    Article
  6. Insights into toxin-antitoxin systems in the genusApplied and environmental microbiology · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Gene-trait matching amongFrontiers in microbiology · 2025
    Article
  13. Article
  14. Article
  15. Article
  16. The potential of Bacillus and Enterococcus probiotic strains to combat helicobacter pylori attachment to the biotic and abiotic surfaces.International microbiology : the official journal of the Spanish Society for Microbiology · 2023
    Article
  17. Nutrients · 2023
    Article
  18. Review
  19. Article
  20. Article
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

9 authors at 2 institutions in 2 countries.

Sandra M KellySchool of Microbiology, University College Cork, Western Road, Cork, Ireland.
Noreen LaniganSchool of Microbiology, University College Cork, Western Road, Cork, Ireland.
Ian J O'NeillAPC Microbiome Ireland, University College Cork, Western Road, Cork, Ireland.
Francesca BottaciniAPC Microbiome Ireland, University College Cork, Western Road, Cork, Ireland.
Gabriele Andrea LugliLaboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy.
Alice ViappianiGenProbio Srl, 43124, Parma, Italy.
Francesca TurroniLaboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy.
Marco VenturaLaboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy.
Douwe van SinderenSchool of Microbiology, University College Cork, Western Road, Cork, Ireland. d.vansinderen@ucc.ie.
University College Cork · IEUniversity of Parma · IT

Funding

Science Foundation Ireland SFI/12/RC/2273-P1
6 · The paper itself

Abstract

In the current study, we show that biofilm formation by various strains and species belonging to Bifidobacterium, a genus that includes gut commensals with reported health-promoting activities, is induced by high concentrations of bile (0.5% (w/v) or higher) and individual bile salts (20 mM or higher), rather than by acid or osmotic stress. The transcriptomic response of a bifidobacterial prototype Bifidobacterium breve UCC2003 to such high bile concentrations was investigated and a random transposon bank of B. breve UCC2003 was screened for mutants that affect biofilm formation in order to identify genes involved in this adaptive process. Eleven mutants affected in their ability to form a biofilm were identified, while biofilm formation capacity of an insertional mutation in luxS and an exopolysaccharide (EPS) negative B. breve UCC2003 was also studied. Reduced capacity to form biofilm also caused reduced viability when exposed to porcine bile. We propose that bifidobacterial biofilm formation is an adaptive response to high concentrations of bile in order to avoid bactericidal effects of high bile concentrations in the gastrointestinal environment. Biofilm formation appears to be a multi-factorial process involving EPS production, proteins and extracellular DNA release, representing a crucial strategy in response to bile stress in order to enhance fitness in the gut environment.

Indexed as

BiofilmsAnimalsBacterial ProteinsBifidobacterium breveBileBile Acids and SaltsCarbon-Sulfur LyasesGastrointestinal MicrobiomeGastrointestinal TractGene Expression ProfilingHumansMutagenesis, InsertionalMutationOsmotic PressurePolysaccharides, BacterialTranscriptomeBacterial ProteinsBile Acids and SaltsCarbon-Sulfur LyasesLuxS protein, BacteriaPolysaccharides, Bacterial

Identifiers

PMID32665665
PMCPMC7360559
OpenAlexW3042289841

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.