Evidence map›Paper›PMID 19751530›Full record

ArticleBMC microbiology2009

Outer membrane vesicles of Helicobacter pylori TK1402 are involved in biofilm formation.

Hideo Yonezawa, Takako Osaki, Satoshi Kurata, Minoru Fukuda, Hayato Kawakami, Kuniyasu Ochiai, Tomoko Hanawa, Shigeru Kamiya

Open access · goldAbstract read
In one paragraph

Article in BMC microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 139 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
139citing papers in PubMed, 1 pooled it
8.5field-weighted citation impact, top 2% 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

139 citing papers in PubMed, 1 synthesis or guideline pooled it, 273 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Review
  12. Article
  13. Characterization ofFrontiers in microbiology · 2026
    Article
  14. Review
  15. Review
  16. Article
  17. Article
  18. Antigen 43 associated withMicrobiology spectrum · 2025
    Article
  19. Review
  20. Review

79 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

8 authors at 2 institutions in 1 country.

Hideo YonezawaDepartment of Infectious Disease, Kyorin University School of Medicine, Shinkawa, Mitaka, Tokyo, 181-8611, Japan. yonezawa@ks.kyorin-u.ac.jp
Takako Osaki
Satoshi Kurata
Minoru Fukuda
Hayato Kawakami
Kuniyasu Ochiai
Tomoko Hanawa
Shigeru Kamiya
Kyorin University · JPNihon University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHelicobacter pylori forms biofilms on glass surfaces at the air-liquid interface in in vitro batch cultures; however, biofilms of H. pylori have not been well characterized. In the present study, we analyzed the ability of H. pylori strains to form biofilms and characterized the underlying mechanisms of H. pylori biofilm formation.

resultsStrain TK1402 showed strong biofilm forming ability relative to the other strains in Brucella broth supplemented with 7% FCS. The strong biofilm forming ability of TK1402 is reflected the relative thickness of the biofilms. In addition, outer membrane vesicles (OMV) were detected within the matrix of only the TK1402 biofilms. Biofilm formation was strongly correlated with the production of OMV in this strain. We further observed that strain TK1402 did not form thick biofilms in Brucella broth supplemented with 0.2% beta-cyclodextrin. However, the addition of the OMV-fraction collected from TK1402 could enhance biofilm formation.

conclusionThe results suggested that OMV produced from TK1402 play an important role in biofilm formation in strain TK1402.

Indexed as

BiofilmsCell MembraneCulture MediaHelicobacter pyloriMicrobial ViabilityMicroscopy, ConfocalMicroscopy, Electron, ScanningCulture Media

Identifiers

PMID19751530
PMCPMC2749055
OpenAlexW2014368385

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.