Cited by 447Antimicrobial Peptides and ActivitiesImmune Response and InflammationDermatology and Skin Diseases

Activation of TLR2 by a Small Molecule Produced by Staphylococcus epidermidis Increases Antimicrobial Defense against Bacterial Skin Infections

Open access
Lai, Yuping, Cogen, Anna L., Radek, Katherine A., Park, Hyun Jeong, MacLeod, Daniel T., Leichtle, Anke, Ryan, Allen F., Di Nardo, Anna +1 more·2010·Journal of Investigative Dermatology

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.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1038/jid.2010.123

Cites

60 of 60 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Commensal organisms such as strains of Staphylococcus epidermidis found in the skin secrete antibacterial compounds such as phenol-soluble modulins and interact with the host to induce AMP expression or reduce inflammation.

    “Commensal organisms such as strains of Staphylococcus epidermidis found in the skin secrete compounds that are themselves antibacterial, such as phenol-soluble modulins,4,5 and also interact with the host to induce AMP expression6 or reduce inflammation.6”

    From The Innate Immune System in Acute and Chronic Wounds (2016) · cites this paper as [6]

  • Recent mouse studies revealed that murine β-defensin 3 and Reg3γ, but not S100A8, have wound healing-promoting properties as they could rescue defective wound healing in IL-17A−/− mice, which show defective AMP induction.

    “In fact, recent mouse studies further revealed that murine β-defensin 3 (the ortholog of hBD2) and Reg3γ (ortholog of REG3A), but not S100A8, have wound healing-promoting properties as they could rescue defective wound healing in IL-17A−/− mice, which show defective AMP induction.6,30”

    From The Innate Immune System in Acute and Chronic Wounds (2016) · cites this paper as [6]

  • Bacterial colonization does not necessarily cause inflammation, but high endotoxin levels and other microbial products can drive inflammatory responses.

    “Bacterial colonization does not necessarily cause inflammation,6,19,20 but high endotoxin levels and other microbial products can drive inflammatory responses.”

    From The Innate Immune System in Acute and Chronic Wounds (2016) · cites this paper as [6]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Lai, Y., Cogen, A. L., Radek, K. A., Park, H. J., MacLeod, D. T., Leichtle, A., Ryan, A. F., Di Nardo, A., & Gallo, R. L.
Affiliations
University of California San Diego (US)
Corresponding author
Gallo, Richard L.
Venue
Journal of Investigative Dermatology
Publisher
Elsevier BV
Published
2010-09
Volume
130
Issue
9
Pages
2211-2221
ISSN
0022-202X (ISSN-L)
OpenAlex
W2117733468
Cited by
446
References
60
Citations by year
2026: 22 · 2025: 41 · 2024: 22 · 2023: 26 · 2022: 37 · 2021: 36 · 2020: 30 · 2019: 32 · 2018: 33 · 2017: 29 · 2016: 32 · 2015: 21 · 2014: 27 · 2013: 24 · 2012: 13
FWCI
16.49
Type
journal article
Language
en
Open access
Locations
  • Journal of Investigative Dermatology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • LSHTM Research Online (London School of Hygiene and Tropical Medicine) (submittedVersion)
Funders
  • National Institutes of Health (R01-AI052453)
  • National Institute on Alcohol Abuse and Alcoholism (P30AA019373)
  • National Institute on Deafness and Other Communication Disorders (DC006279, R01DC006279)
  • National Institute of Allergy and Infectious Diseases (R01AI052453, R56AI083358, R01AI083358, R37AI052453)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR052728)
Topics
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Health Sciences › Medicine › Dermatology › Dermatology and Skin Diseases
Keywords
Staphylococcus epidermidis, TLR2, antimicrobial peptides, human beta-defensin 2, human beta-defensin 3, keratinocytes, skin infections, commensal bacteria, Streptococcus pyogenes, Staphylococcus aureus, innate immunity, bacterial skin infections
MeSH terms
Epidermal Cells, Animals, Bacterial Proteins, Cells, Cultured, Epidermis, Humans, Mice, Inbred C57BL, Staphylococcal Skin Infections, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcal Infections, Streptococcus pyogenes, Signal Transduction, Keratinocytes, Culture Media, Conditioned, Mice, Knockout, Gene Silencing, beta-Defensins, Toll-Like Receptor 2, Mice, Antibodies, Neutralizing

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review