Evidence map›Paper›PMID 12540550›Full record

ArticleInfection and immunity2003

Oral treponemes and their outer membrane extracts activate human gingival epithelial cells through toll-like receptor 2.

Yasuyuki Asai, Takayoshi Jinno, Tomohiko Ogawa

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.7field-weighted citation impact, top 6% 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

27 citing papers in PubMed, 63 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Clinical characteristics ofFrontiers in cellular and infection microbiology · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Pathogenic Mechanisms ofFrontiers in oral health · 2022
    Review
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Treponema denticola interactions with host proteins.Journal of oral microbiology · 2012
    Article
  16. Article
  17. Article
  18. Review
  19. Article
  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

3 authors at 1 institution in 1 country.

Yasuyuki AsaiDepartment of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Motosu-gun, Gifu 501-0296, Japan.
Takayoshi Jinno
Tomohiko Ogawa
Asahi University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Oral treponemes are considered to be important in the development and progression of periodontal diseases. We investigated the mechanisms of recognition and activation of human gingival epithelial cells (HGEC) with the oral treponemes Treponema denticola, Treponema vincentii, and Treponema medium and their outer membrane extracts (OMEs). T. vincentii and T. medium but not T. denticola produced interleukin 8 (IL-8) in an HGEC culture. Further, all three treponemes induced IL-8 mRNA expression and NF-kappaB activation in HGEC. Among them, T. denticola especially exhibited trypsin- and chymotrypsin-like protease activities, and the addition of chymostatin, a chymotrypsin protease inhibitor, resulted in detectable IL-8 production by HGEC cultured with T. denticola. Additionally, IL-8 mRNA expression in HGEC cultured with the three treponemes and their OMEs was definitely inhibited by the mouse anti-human Toll-like receptor 2 (TLR2) monoclonal antibody TL2.1. These findings suggest that oral treponemes and their OMEs activate HGEC through TLR2.

Indexed as

Drosophila ProteinsAnimalsCell MembraneCells, CulturedEpithelial CellsGingivaHumansInterleukin-8Membrane GlycoproteinsMiceMouthReceptors, Cell SurfaceRNA, MessengerToll-Like Receptor 2Toll-Like ReceptorsTreponemaDrosophila ProteinsInterleukin-8Membrane GlycoproteinsReceptors, Cell SurfaceRNA, MessengerTLR2 protein, humanToll-Like Receptor 2Toll-Like Receptors

Identifiers

PMID12540550
PMCPMC145376
OpenAlexW2170643575

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.