Evidence map›Paper›PMID 25953484›Full record

ArticleMolecular oral microbiology2015

Outer membrane vesicles of Tannerella forsythia: biogenesis, composition, and virulence.

V Friedrich, C Gruber, I Nimeth, S Pabinger, G Sekot, G Posch, F Altmann, P Messner, O Andrukhov, C Schäffer

Open access · hybridAbstract read
In one paragraph

Article in Molecular oral microbiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
3.2field-weighted citation impact, top 9% 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

46 citing papers in PubMed, 64 citations in OpenAlex.

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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 at 3 institutions in 1 country.

V FriedrichDepartment of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria.
C GruberDepartment of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria.
I NimethDepartment of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria.
S PabingerAIT Austrian Institute of Technology, Health & Environment Department, Molecular Diagnostics, Vienna, Austria.
G SekotDepartment of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria.
G PoschDepartment of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria.
F AltmannDepartment of Chemistry, Universität für Bodenkultur Wien, Vienna, Austria.
P MessnerDepartment of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria.
O AndrukhovDivision of Conservative Dentistry and Periodontology, Competence Centre of Periodontal Research, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
C SchäfferDepartment of NanoBiotechnology, NanoGlycobiology unit, Universität für Bodenkultur Wien, Vienna, Austria.
BOKU University · ATAustrian Institute of Technology · ATMedical University of Vienna · AT

Funding

Austrian Science Fund FWF P 24305Austrian Science Fund FWF P 24317Austrian Science Fund FWF W 1224
6 · The paper itself

Abstract

Tannerella forsythia is the only 'red-complex' bacterium covered by an S-layer, which has been shown to affect virulence. Here, outer membrane vesicles (OMVs) enriched with putative glycoproteins are described as a new addition to the virulence repertoire of T. forsythia. Investigations of this bacterium are hampered by its fastidious growth requirements and the recently discovered mismatch of the available genome sequence (92A2 = ATCC BAA-2717) and the widely used T. forsythia strain (ATCC 43037). T. forsythia was grown anaerobically in serum-free medium and biogenesis of OMVs was analyzed by electron and atomic force microscopy. This revealed OMVs with a mean diameter of ~100 nm budding off from the outer membrane while retaining the S-layer. An LC-ESI-TOF/TOF proteomic analysis of OMVs from three independent biological replicates identified 175 proteins. Of these, 14 exhibited a C-terminal outer membrane translocation signal that directs them to the cell/vesicle surface, 61 and 53 were localized to the outer membrane and periplasm, respectively, 22 were predicted to be extracellular, and 39 to originate from the cytoplasm. Eighty proteins contained the Bacteroidales O-glycosylation motif, 18 of which were confirmed as glycoproteins. Release of pro-inflammatory mediators from the human monocytic cell line U937 and periodontal ligament fibroblasts upon stimulation with OMVs followed a concentration-dependent increase that was more pronounced in the presence of soluble CD14 in conditioned media. The inflammatory response was significantly higher than that caused by whole T. forsythia cells. Our study represents the first characterization of T. forsythia OMVs, their proteomic composition and immunogenic potential.

Indexed as

Bacterial Outer Membrane ProteinsBacteroidetesCell Membrane StructuresCells, CulturedCulture Media, ConditionedGlycoproteinsGlycosylationHumansLipopolysaccharide ReceptorsMembrane GlycoproteinsOrganelle BiogenesisPeriplasmProteomicsU937 CellsVirulenceBacterial Outer Membrane ProteinsCulture Media, ConditionedGlycoproteinsLipopolysaccharide ReceptorsMembrane GlycoproteinsS-layer proteinsatomic force microscopyelectron microscopyinflammatory responseouter membrane vesiclesperiodontal pathogenTannerella forsythia strain ATCC 43037 versus strain 92A2

Identifiers

PMID25953484
PMCPMC4604654
OpenAlexW1599479604

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.