Evidence map›Paper›PMID 21502588›Full record

ArticleInfection and immunity2011

Conservation of Ebp-type pilus genes among Enterococci and demonstration of their role in adherence of Enterococcus faecalis to human platelets.

Sreedhar R Nallapareddy, Jouko Sillanpää, Jennifer Mitchell, Kavindra V Singh, Shahreen A Chowdhury, George M Weinstock, Paul M Sullam, Barbara E Murray

Abstract read
In one paragraph

Article in Infection and immunity, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

37 citing papers in PubMed, 94 citations in OpenAlex.

  1. Contact dependent suppression ofbioRxiv : the preprint server for biology · 2026
    Article
  2. Role of sortase-assembled Ebp pili inMicrobiology spectrum · 2025
    Article
  3. Review
  4. The emerging challenge ofClinical microbiology reviews · 2024
    Review
  5. Microbiology and molecular biology reviews : MMBR · 2024
    Review
  6. Review
  7. Article
  8. Non-Clinical microbiology reviews · 2024
    Review
  9. The Impact ofPathogens (Basel, Switzerland) · 2024
    Review
  10. Review
  11. Article
  12. The Role of Platelets in Infective Endocarditis.International journal of molecular sciences · 2023
    Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Biofilm-associated infection by enterococci.Nature reviews. Microbiology · 2019
    Review
  18. Article
  19. Novel Molecular Insights about Lactobacillar Sortase-Dependent Piliation.International journal of molecular sciences · 2017
    Review
  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

8 authors at 5 institutions in 2 countries.

Sreedhar R NallapareddyDivision of Infectious Diseases, Department of Internal Medicine, Center for the Study of Emerging and Re-emerging Pathogens, University of Texas Medical School, Houston, Texas 77030, USA.
Jouko Sillanpää
Jennifer Mitchell
Kavindra V Singh
Shahreen A Chowdhury
George M Weinstock
Paul M Sullam
Barbara E Murray
The University of Texas Health Science Center at Houston · USThe University of Texas at Austin · USUniversity College Dublin · IEUniversity of California, San Francisco · USWashington University in St. Louis · US

Funding

STREPTOCOCCAL PLATELET BINDING AND ENDOCARDITISR01AI041513 · NIAID · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI SULLAM, PAUL M. · 1997 to 2019
$5.6M
ALTERNATIVE APPROACHES FOR E FAECALIS INFECTIONSR37AI047923 · NIAID · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI MURRAY, BARBARA E · 2000 to 2009
$4.0M
Alternative Approaches for E. faecalis InfectionsR01AI047923 · NIAID · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI MURRAY, BARBARA E · 2010 to 2014
$3.1M
Prophage-Encoded Binding of S. mitis to Human PlateletsR01AI057433 · NIAID · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI SULLAM, PAUL M. · 2004 to 2008
$1.8M
NIAID NIH HHS R01 AI041513NIAID NIH HHS R01 AI047923NIAID NIH HHS R01 AI057433NIAID NIH HHS R01 AI47923NIAID NIH HHS R37 AI047923NIAID NIH HHS R37 AI47923
6 · The paper itself

Abstract

Ebp are endocarditis- and biofilm-associated pili of Enterococcus faecalis that are also important in experimental urinary tract infections (UTIs). Our analyses, using available genomes, found that the ebp locus is unique to enterococci. In E. faecalis, the ebp locus is very highly conserved and only 1/473 E. faecalis isolates tested lacked ebpABC, while only 1.2% had the bee pilus locus. No other pilus-encoding operon was identified in 55 available genomes, indicating that the vast majority of E. faecalis strains (unlike Enterococcus faecium and streptococci) have a single pilus locus. Surface expression studies showed that Ebp pili were produced in vitro by 91/91 brain heart infusion (BHI) plus serum-grown E. faecalis isolates and that strain OG1RF expressed pili at even higher levels in rat endocarditis vegetations. However, Ebp expression was restricted to 30 to 72% of E. faecalis cells, consistent with a bistability mode of expression. We also evaluated E. faecalis interactions with human platelets and found that growth of E. faecalis in BHI plus serum significantly enhanced adherence to human platelets and that sortase deletion mutants (the ΔsrtA, Δbps, and ΔbpsΔsrtA mutants) were markedly defective. Further studies identified that Ebp pili, but not the microbial surface components recognizing adhesive matrix molecules (MSCRAMMs) Ace and Fss2, mediate adherence of E. faecalis to platelets. Taken together, our data show that the immunogenic (in human endocarditis patients) and commonly expressed Ebp pili, which are known to be important for experimental endocarditis, are highly conserved and mediate adherence to platelets, suggesting that Ebp pili may be a reasonable immunotherapeutic target for prevention or possibly treatment of endocarditis caused by this species.

Indexed as

Bacterial AdhesionGenes, BacterialAmino Acid SequenceAnimalsBacterial ProteinsBlood PlateletsConserved SequenceEndocarditis, BacterialEnterococcus faecalisEnzyme-Linked Immunosorbent AssayFimbriae, BacterialFimbriae ProteinsFlow CytometryGenetic VariationGram-Positive Bacterial InfectionsHumansBacterial ProteinsFimbriae Proteins

Identifiers

PMID21502588
PMCPMC3191956
OpenAlexW2143905182

What OpenQuestion holds

Textmetadata
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.