Evidence map›Paper›PMID 27112346›Full record

ArticleMicrobiology (Reading, England)2016

The Staphylococcus aureus polysaccharide capsule and Efb-dependent fibrinogen shield act in concert to protect against phagocytosis.

Annemarie Kuipers, Daphne A C Stapels, Lleroy T Weerwind, Ya-Ping Ko, Maartje Ruyken, Jean C Lee, Kok P M van Kessel, Suzan H M Rooijakkers

Open access · greenAbstract read
In one paragraph

Article in Microbiology (Reading, England), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
4.5field-weighted citation impact, top 5% 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

32 citing papers in PubMed, 62 citations in OpenAlex.

  1. Review
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  9. Review
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  14. C1q binding to surface-bound IgG is stabilized by C1rProceedings of the National Academy of Sciences of the United States of America · 2021
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  15. Article
  16. Non-Frontiers in veterinary science · 2021
    Review
  17. Article
  18. Article
  19. Review
  20. Dendritic Cells InternalizeMicroorganisms · 2019
    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

8 authors at 3 institutions in 2 countries.

Annemarie KuipersMedical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
Daphne A C StapelsMedical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
Lleroy T WeerwindMedical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
Ya-Ping KoCenter for Infectious and Inflammatory Disease, Institute of Bioscience and Technology, Texas A&M University Health Science Center, Houston, TX 77030, USA.
Maartje RuykenMedical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
Jean C LeeDivision of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Kok P M van KesselMedical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
Suzan H M RooijakkersMedical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands.
University Medical Center Utrecht · NLBrigham and Women's Hospital · USTexas A&M University · US

Funding

BINDING OF BACTERIA TO FIBRONECTIN AN FIBRINOGENR01AI020624 · NIAID · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI HOOK, AXEL MAGNUS · 1985 to 2020
$9.7M
Analysis of Staphylococcus Aureus Host InteractionsR56AI020624 · NIAID · TEXAS A&M UNIVERSITY HEALTH SCIENCE CTR · PI GANESH, VANNAKAMBADI, HOOK, AXEL MAGNUS · 2016 to 2016
$476k
European Research Council 639209NIAID NIH HHS R01 AI020624NIAID NIH HHS R56 AI020624
6 · The paper itself

Abstract

Staphylococcus aureus has developed many mechanisms to escape from human immune responses. To resist phagocytic clearance, S. aureus expresses a polysaccharide capsule, which effectively masks the bacterial surface and surface-associated proteins, such as opsonins, from recognition by phagocytic cells. Additionally, secretion of the extracellular fibrinogen binding protein (Efb) potently blocks phagocytic uptake of the pathogen. Efb creates a fibrinogen shield surrounding the bacteria by simultaneously binding complement C3b and fibrinogen at the bacterial surface. By means of neutrophil phagocytosis assays with fluorescently labelled encapsulated serotype 5 (CP5) and serotype 8 (CP8) strains we compare the immune-modulating function of these shielding mechanisms. The data indicate that, in highly encapsulated S. aureus strains, the polysaccharide capsule is able to prevent phagocytic uptake at plasma concentrations <10 %, but loses its protective ability at higher concentrations of plasma. Interestingly, Efb shows a strong inhibitory effect on both capsule-negative and encapsulated strains at all tested plasma concentrations. Furthermore, the results suggest that both shielding mechanisms can exist simultaneously and collaborate to provide optimal protection against phagocytosis at a broad range of plasma concentrations. As opsonizing antibodies will be shielded from recognition by either mechanism, incorporating both capsular polysaccharides and Efb in future vaccines could be of great importance.

Indexed as

Antibodies, BacterialBacterial CapsulesBacterial ProteinsComplement C3bFibrinogenFluorescent DyesHumansImmunomodulationMicroscopy, ConfocalNeutrophilsOpsonin ProteinsPhagocytosisPolysaccharides, BacterialStaphylococcal InfectionsStaphylococcus aureusAntibodies, BacterialBacterial ProteinsComplement C3bEfb protein, Staphylococcus aureusFibrinogenFluorescent DyesOpsonin ProteinsPolysaccharides, Bacterial

Identifiers

PMID27112346
PMCPMC4977062
OpenAlexW2344913974

What OpenQuestion holds

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LicenceTDM
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.