Evidence map›Paper›PMID 25528573›Full record

ArticleBMC microbiology2014

Modulation of bacterial outer membrane vesicle production by envelope structure and content.

Carmen Schwechheimer, Adam Kulp, Meta J Kuehn

Open access · goldAbstract read
In one paragraph

Article in BMC microbiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 121 papers.

0numbers the graph read from it
0cells of the map it votes in
121citing papers in PubMed
6.3field-weighted citation impact, top 3% 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

121 citing papers in PubMed, 190 citations in OpenAlex.

  1. Review
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  4. Applied and environmental microbiology · 2026
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  10. Bacterial Outer Membrane Vesicles in Potentiating Cancer Vaccines: Progress and Prospects.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  11. Article
  12. Frontiers in bacterial outer membrane vesicles: From basic characteristics to cancer therapy.Chinese journal of cancer research = Chung-kuo yen cheng yen chiu · 2026
    Article
  13. Article
  14. Review
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61 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

3 authors at 2 institutions in 1 country.

Carmen SchwechheimerDepartment of Biochemistry, Duke University Medical Center, Durham, NC, 27710, USA. carmensch0311@gmail.com.
Adam KulpDepartment of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, 27710, USA. Adam.Kulp@effem.com.
Meta J KuehnDepartment of Biochemistry, Duke University Medical Center, Durham, NC, 27710, USA. meta.kuehn@duke.edu.
Duke University Hospital · USDuke Medical Center · US

Funding

Triggers and Consequences of Bacterial Envelope StressR01GM099471 · NIGMS · DUKE UNIVERSITY · PI KUEHN, META J · 2012 to 2015
$1.1M
NIGMS NIH HHS R01 GM099471NIGMS NIH HHS R01GM099471
6 · The paper itself

Abstract

backgroundVesiculation is a ubiquitous secretion process of Gram-negative bacteria, where outer membrane vesicles (OMVs) are small spherical particles on the order of 50 to 250 nm composed of outer membrane (OM) and lumenal periplasmic content. Vesicle functions have been elucidated in some detail, showing their importance in virulence factor secretion, bacterial survival, and biofilm formation in pathogenesis. Furthermore, OMVs serve as an envelope stress response, protecting the secreting bacteria from internal protein misfolding stress, as well as external envelope stressors. Despite their important functional roles very little is known about the regulation and mechanism of vesicle production. Based on the envelope architecture and prior characterization of the hypervesiculation phenotypes for mutants lacking the lipoprotein, Lpp, which is involved in the covalent OM-peptidoglycan (PG) crosslinks, it is expected that an inverse relationship exists between OMV production and PG-crosslinked Lpp.

resultsIn this study, we found that subtle modifications of PG remodeling and crosslinking modulate OMV production, inversely correlating with bound Lpp levels. However, this inverse relationship was not found in strains in which OMV production is driven by an increase in "periplasmic pressure" resulting from the accumulation of protein, PG fragments, or lipopolysaccharide. In addition, the characterization of an nlpA deletion in backgrounds lacking either Lpp- or OmpA-mediated envelope crosslinks demonstrated a novel role for NlpA in envelope architecture.

conclusionsFrom this work, we conclude that OMV production can be driven by distinct Lpp concentration-dependent and Lpp concentration-independent pathways.

Indexed as

Bacterial Outer Membrane ProteinsCell MembraneCell WallEscherichia coliEscherichia coli ProteinsGene DeletionLipoproteinsPeptidoglycanProtein BindingSecretory VesiclesBacterial Outer Membrane ProteinsEscherichia coli ProteinsLipoproteinsLpp protein, E coliPeptidoglycan

Identifiers

PMID25528573
PMCPMC4302634
OpenAlexW2150459457

What OpenQuestion holds

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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.