Evidence map›Paper›PMID 19821005›Full record

ArticleJournal of gastroenterology2010

Persistence of a component of DNA methylation in gastric mucosae after Helicobacter pylori eradication.

Takeshi Nakajima, Shotaro Enomoto, Satoshi Yamashita, Takayuki Ando, Yukihiro Nakanishi, Kazuyuki Nakazawa, Ichiro Oda, Takuji Gotoda, Toshikazu Ushijima

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In one paragraph

Article in Journal of gastroenterology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed, 2 pooled it
6.5field-weighted citation impact, top 3% 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

71 citing papers in PubMed, 2 syntheses or guidelines pooled it, 126 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Review
  5. Review
  6. Concurrent hypermethylation of CpG islands and hypomethylation of CpG-poor regions are associated with gastric cancer risk after Helicobacter pylori eradication.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2025
    Article
  7. Review
  8. Article
  9. Update on molecular pathogenesis ofWorld journal of gastrointestinal pathophysiology · 2025
    Review
  10. Review
  11. Review
  12. Article
  13. Article
  14. Gastric microbiome signature for predicting metachronous recurrence after endoscopic resection of gastric neoplasm.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2024
    Article
  15. Review
  16. The role of cuproptosis in gastric cancer.Frontiers in immunology · 2024
    Review
  17. Article
  18. Article
  19. Review
  20. Article

11 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 2 institutions in 2 countries.

Takeshi NakajimaCarcinogenesis Division, National Cancer Center Research Institute, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan. tnakajim@ncc.go.jp
Shotaro Enomoto
Satoshi Yamashita
Takayuki Ando
Yukihiro Nakanishi
Kazuyuki Nakazawa
Ichiro Oda
Takuji Gotoda
Toshikazu Ushijima
Genesis Research Institute · JPWakayama Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHelicobacter pylori (HP) infection potently induces aberrant DNA methylation in gastric mucosae, and its accumulation is associated with gastric cancer risk. Cross-sectional analysis of methylation levels (fraction of methylated DNA molecules) and temporal analysis of methylation incidence suggested that methylation levels decrease after HP infection discontinues. We aimed to demonstrate the decrease in methylation levels.

methodsThirty-five patients with HP infection who had undergone curative endoscopic resection and 11 healthy volunteers were recruited. Methylation levels were quantified by real-time methylation-specific PCR. Histology was evaluated according to the updated Sydney System.

resultsIn the 20 patients with successful eradication, the FLNc methylation level, along with infiltration of inflammatory cells, decreased from 0.6 to 0.4% at 6 weeks (P = 0.049) and remained low at 1 year. The THBD methylation level (30.1%) remained high at 6 weeks, but decreased to 19.0% at 1 year (P = 0.0032). Nine healthy volunteers with successful eradication tended to show a decrease of both FLNc and THBD at 6 weeks. However, the methylation levels after the decrease were still higher than those of healthy individuals without HP infection. In the 15 patients with persistent infection, the methylation levels remained the same. Before eradication, the THBD methylation level correlated with the degree of inflammatory cell infiltration (P < 0.05).

conclusionsMethylation levels in gastric mucosae decreased to certain levels after HP eradication in profiles unique to individual markers. Involvement of chronic inflammation in methylation induction was suggested.

Indexed as

DNA MethylationAgedCase-Control StudiesCross-Sectional StudiesFemaleGastric MucosaHelicobacter InfectionsHelicobacter pyloriHumansInflammationMaleMiddle AgedPolymerase Chain ReactionStomach NeoplasmsTime Factors

Identifiers

PMID19821005
OpenAlexW2162557348

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.