Evidence map›Paper›PMID 27242727›Full record

ArticleFrontiers in microbiology2016

Activation of Immune and Defense Responses in the Intestinal Mucosa by Outer Membrane Vesicles of Commensal and Probiotic Escherichia coli Strains.

María José Fábrega, Laura Aguilera, Rosa Giménez, Encarna Varela, María Alexandra Cañas, María Antolín, Josefa Badía, Laura Baldomà

Open access · goldAbstract read
In one paragraph

Article in Frontiers in microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 111 papers.

0numbers the graph read from it
0cells of the map it votes in
111citing papers in PubMed
5.2field-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

111 citing papers in PubMed, 141 citations in OpenAlex.

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  15. Extracellular vesicles of Gram-negative and Gram-positive probiotics.Journal of microbiology (Seoul, Korea) · 2025
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  18. Characterization ofIranian journal of microbiology · 2025
    Article
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51 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

8 authors at 4 institutions in 1 country.

María José FábregaDepartament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona Barcelona, Spain.
Laura AguileraDepartament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona Barcelona, Spain.
Rosa GiménezDepartament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona Barcelona, Spain.
Encarna VarelaDepartment of Gastroenterology, Digestive System Research Unit, Institut de Recerca Vall d'Hebron, CIBER EHD, Instituto de Salud Carlos III, University Hospital Vall d'Hebron, Universitat Autònoma de Barcelona Barcelona, Spain.
María Alexandra CañasDepartament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona Barcelona, Spain.
María AntolínDepartment of Gastroenterology, Digestive System Research Unit, Institut de Recerca Vall d'Hebron, CIBER EHD, Instituto de Salud Carlos III, University Hospital Vall d'Hebron, Universitat Autònoma de Barcelona Barcelona, Spain.
Josefa BadíaDepartament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona Barcelona, Spain.
Laura BaldomàDepartament de Bioquímica i Biologia Molecular, Facultat de Farmàcia, Institut de Biomedicina de la Universitat de Barcelona, Universitat de Barcelona Barcelona, Spain.
Institut de Biomedicina de la Universitat de BarcelonaUniversitat de Barcelona · ESInstituto de Salud Carlos III · ESUniversitat Autònoma de Barcelona · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The influence of microbiota in human health is well-known. Imbalances in microbiome structure have been linked to several diseases. Modulation of microbiota composition through probiotic therapy is an attempt to harness the beneficial effects of commensal microbiota. Although, there is wide knowledge of the responses induced by gut microbiota, the microbial factors that mediate these effects are not well-known. Gram-negative bacteria release outer membrane vesicles (OMVs) as a secretion mechanism of microbial factors, which have an important role in intercellular communication. Here, we investigated whether OMVs from the probiotic Escherichia coli strain Nissle 1917 (EcN) or the commensal E. coli strain ECOR12 trigger immune responses in various cellular models: (i) peripheral blood mononuclear cells (PBMCs) as a model of intestinal barrier disruption, (ii) apical stimulation of Caco-2/PMBCs co-culture as a model of intact intestinal mucosa, and (iii) colonic mucosa explants as an ex vivo model. Stimulations with bacterial lysates were also performed. Whereas, both OMVs and lysates activated expression and secretion of several cytokines and chemokines in PBMCs, only OMVs induced basolateral secretion and mRNA upregulation of these mediators in the co-culture model. We provide evidence that OMVs are internalized in polarized Caco-2 cells. The activated epithelial cells elicit a response in the underlying immunocompetent cells. The OMVs effects were corroborated in the ex vivo model. This experimental study shows that OMVs are an effective strategy used by beneficial gut bacteria to communicate with and modulate host responses, activating signaling events through the intestinal epithelial barrier.

Indexed as

Caco-2/PBMC co-culturegut microbesintestinal mucosamembrane vesiclesmicrobiota-host crosstalkNissle 1917probiotics

Identifiers

PMID27242727
PMCPMC4863414
OpenAlexW2393330052

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.