Evidence map›Paper›PMID 20463690›Full record

ArticleThe Journal of investigative dermatology2010

Activation of TLR2 by a small molecule produced by Staphylococcus epidermidis increases antimicrobial defense against bacterial skin infections.

Yuping Lai, Anna L Cogen, Katherine A Radek, Hyun Jeong Park, Daniel T Macleod, Anke Leichtle, Allen F Ryan, Anna Di Nardo, Richard L Gallo

Open access · greenAbstract read
In one paragraph

Article in The Journal of investigative dermatology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 228 papers.

0numbers the graph read from it
0cells of the map it votes in
228citing papers in PubMed
12.6field-weighted citation impact, top 1% 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

228 citing papers in PubMed, 430 citations in OpenAlex.

  1. Trial
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  6. Insights into bacterial colonization of intensive care patients' skin: the effect of chlorhexidine daily bathing.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2015
    Trial
  7. Review
  8. Article
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  10. Search for Potentially VirulentInternational journal of molecular sciences · 2026
    Article
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  18. Article
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168 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

9 authors at 3 institutions in 3 countries.

Yuping LaiDivision of Dermatology, Department of Medicine, University of California, San Diego and VA San Diego Healthcare System, San Diego, California 92161, USA.
Anna L Cogen
Katherine A Radek
Hyun Jeong Park
Daniel T Macleod
Anke Leichtle
Allen F Ryan
Anna Di Nardo
Richard L Gallo
University of California, San Diego · USVA San Diego Healthcare System · USEast China Normal University · CN

Funding

Cathelicidins in Skin ImmunityR01AI052453 · NIAID · VETERANS MEDICAL RESEARCH FDN/SAN DIEGO · PI GALLO, RICHARD L, NIZET, VICTOR · 2002 to 2017
$5.3M
Cathelicidin in Skin ImmunityR37AI052453 · NIAID · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI Richard L Gallo, Victor Nizet · 2019 to 2026
$4.6M
Proteolysis and Skin AntimicrobialsR01AR052728 · NIAMS · VETERANS MEDICAL RESEARCH FDN/SAN DIEGO · PI GALLO, RICHARD L · 2006 to 2015
$3.3M
Mechanisms of Persistence and Recovery in Otitis MediaR01DC006279 · NIDCD · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI WASSERMAN, STEPHEN I · 2003 to 2014
$3.1M
Skin Microbiome in epidermal immune defenseR01AI083358 · NIAID · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI GALLO, RICHARD L · 2010 to 2014
$1.9M
Loyola Alcohol Research Center (LARC)P30AA019373 · NIAAA · LOYOLA UNIVERSITY CHICAGO · PI KOVACS, ELIZABETH J. · 2009 to 2010
$832k
Skin Microbiome in epidermal immune defenseR56AI083358 · NIAID · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI GALLO, RICHARD L · 2009 to 2009
$123k
NIAAA NIH HHS P30 AA019373NIAID NIH HHS R01 AI052453NIAID NIH HHS R01AI052453NIAID NIH HHS R01 AI083358NIAID NIH HHS R01AI083358NIAID NIH HHS R37 AI052453NIAID NIH HHS R56 AI083358NIAMS NIH HHS R01 AR052728NIAMS NIH HHS R01AR052728NIDCD NIH HHS DC006279NIDCD NIH HHS R01 DC006279
6 · The paper itself

Abstract

Production of antimicrobial peptides by epithelia is an essential defense against infectious pathogens. In this study we evaluated whether the commensal microorganism Staphylococcus epidermidis may enhance production of antimicrobial peptides by keratinocytes and thus augment skin defense against infection. Exposure of cultured undifferentiated human keratinocytes to a sterile nontoxic small molecule of <10 kDa from S. epidermidis conditioned culture medium (SECM), but not similar preparations from other bacteria, enhanced human beta-defensin 2 (hBD2) and hBD3 mRNA expression and increased the capacity of cell lysates to inhibit the growth of group A Streptococcus (GAS) and S. aureus. Partial gene silencing of hBD3 inhibited this antimicrobial action. This effect was relevant in vivo as administration of SECM to mice decreased susceptibility to infection by GAS. Toll-like receptor 2 (TLR2) was important to this process as a TLR2-neutralizing antibody blocked induction of hBDs 2 and 3, and Tlr2-deficient mice did not show induction of mBD4. Taken together, these findings reveal a potential use for normal commensal bacterium S. epidermidis to activate TLR2 signaling and induce antimicrobial peptide expression, thus enabling the skin to mount an enhanced response to pathogens.

Indexed as

Staphylococcus aureusStaphylococcus epidermidisAnimalsAntibodies, NeutralizingBacterial Proteinsbeta-DefensinsCells, CulturedCulture Media, ConditionedEpidermal CellsEpidermisGene SilencingHumansKeratinocytesMiceMice, Inbred C57BLMice, KnockoutAntibodies, NeutralizingBacterial Proteinsbeta-DefensinsCulture Media, ConditionedDEFB103A protein, humanDEFB4A protein, humanTLR2 protein, humanTlr2 protein, mouseToll-Like Receptor 2

Identifiers

PMID20463690
PMCPMC2922455
OpenAlexW2117733468

What OpenQuestion holds

Textmetadata
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.