Evidence map›Paper›PMID 21947772›Full record

ArticleInfection and immunity2011

Suppression of the inflammatory immune response prevents the development of chronic biofilm infection due to methicillin-resistant Staphylococcus aureus.

Ranjani Prabhakara, Janette M Harro, Jeff G Leid, Achsah D Keegan, Megan L Prior, Mark E Shirtliff

Open access · bronzeAbstract 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 60 papers.

0numbers the graph read from it
0cells of the map it votes in
60citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

60 citing papers in PubMed, 117 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Review
  8. Fracture-related infection.Nature reviews. Disease primers · 2022
    Review
  9. Article
  10. Review
  11. Immunometabolism in biofilm infection: lessons from cancer.Molecular medicine (Cambridge, Mass.) · 2022
    Review
  12. Article
  13. AssessingFrontiers in cellular and infection microbiology · 2022
    Article
  14. Article
  15. Article
  16. IL-6 Inhibition Reduces Neuronal Injury in a Murine Model of Ventilator-induced Lung Injury.American journal of respiratory cell and molecular biology · 2021
    Article
  17. Article
  18. Article
  19. 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

6 authors at 2 institutions in 1 country.

Ranjani PrabhakaraDepartment of Microbial Pathogenesis, Dental School, University of Maryland-Baltimore, Baltimore, MD 21201, USA.
Janette M Harro
Jeff G Leid
Achsah D Keegan
Megan L Prior
Mark E Shirtliff
University of Maryland, Baltimore · USNorthern Arizona University · US

Funding

Staphylococcus aureus biofilms: in vitro and in vivo studiesR01AI069568 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI SHIRTLIFF, MARK E · 2007 to 2011
$2.1M
Candida albicans and Staphylococcus aureus dual species biofilmsR01DE020939 · NIDCR · UNIVERSITY OF MARYLAND BALTIMORE · PI JABRA-RIZK, MARY ANN Y · 2010 to 2014
$1.8M
NIAID NIH HHS R01 AI069568NIAID NIH HHS R01AI69568NIDCR NIH HHS 1R01DE20939NIDCR NIH HHS R01 DE020939
6 · The paper itself

Abstract

Staphylococcus aureus is a common cause of prosthetic implant infections, which can become chronic due to the ability of S. aureus to grow as a biofilm. Little is known about adaptive immune responses to these infections in vivo. We hypothesized that S. aureus elicits inflammatory Th1/Th17 responses, associated with biofilm formation, instead of protective Th2/Treg responses. We used an adapted mouse model of biofilm-mediated prosthetic implant infection to determine chronic infection rates, Treg cell frequencies, and local cytokine levels in Th1-biased C57BL/6 and Th2-biased BALB/c mice. All C57BL/6 mice developed chronic S. aureus implant infection at all time points tested. However, over 75% of BALB/c mice spontaneously cleared the infection without adjunctive therapy and demonstrated higher levels of Th2 cytokines and anti-inflammatory Treg cells. When chronic infection rates in mice deficient in the Th2 cytokine interleukin-4 (IL-4) via STAT6 mutation in a BALB/c background were assessed, the mice were unable to clear the S. aureus implant infection. Additionally, BALB/c mice depleted of Treg cells via an anti-CD25 monoclonal antibody (MAb) were also unable to clear the infection. In contrast, the C57BL/6 mice that were susceptible to infection were able to eliminate S. aureus biofilm populations on infected intramedullary pins once the Th1 and Th17 responses were diminished by MAb treatment with anti-IL-12 p40. Together, these results indicate that Th2/Treg responses are mechanisms of protection against chronic S. aureus implant infection, as opposed to Th1/Th17 responses, which may play a role in the development of chronic infection.

Indexed as

AnimalsAntibodies, MonoclonalBiofilmsChronic DiseaseImmunity, InnateInflammationInterleukin-12 Subunit p40Interleukin-6Methicillin-Resistant Staphylococcus aureusMiceMice, Inbred BALB CMice, Inbred C57BLMice, KnockoutProstheses and ImplantsStaphylococcal InfectionsSTAT6 Transcription FactorAntibodies, MonoclonalInterleukin-12 Subunit p40Interleukin-6Stat6 protein, mouseSTAT6 Transcription Factor

Identifiers

PMID21947772
PMCPMC3232664
OpenAlexW2122571791

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.