Evidence map›Paper›PMID 22919602›Full record

ReviewFrontiers in cellular and infection microbiology2012

The immunomodulatory properties of Helicobacter pylori confer protection against allergic and chronic inflammatory disorders.

Isabelle C Arnold, Iris Hitzler, Anne Müller

Open access · goldAbstract readReview
In one paragraph

Review in Frontiers in cellular and infection microbiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 5 pooled it
10.9field-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

65 citing papers in PubMed, 5 syntheses or guidelines pooled it, 136 citations in OpenAlex.

  1. To eradicate or not?Frontiers in medicine · 2026
    Pooled it
  2. Helicobacter pylori infection and risk of multiple sclerosis: an updated meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Pooled it
  3. Association Between Helicobacter pylori Exposure and Decreased Odds of Eosinophilic Esophagitis-A Systematic Review and Meta-analysis.Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association · 2019
    Pooled it
  4. Pooled it
  5. Pooled it
  6. Article
  7. Article
  8. Article
  9. Neonatal infection withInfection and immunity · 2025
    Article
  10. Review
  11. Effects of Neutrophil-Activating Protein ofAdvanced biomedical research · 2025
    Article
  12. Article
  13. Impact ofDiseases (Basel, Switzerland) · 2024
    Review
  14. Gastroenterology & hepatology · 2024
    Article
  15. CD4European journal of medical research · 2024
    Article
  16. Article
  17. Article
  18. Disease trends afterWorld journal of gastroenterology · 2023
    Article
  19. Frontiers in immunology · 2023
    Article
  20. Article

5 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

3 authors at 1 institution in 1 country.

Isabelle C ArnoldInstitute of Molecular Cancer Research, University of Zürich Zürich, Switzerland.
Iris Hitzler
Anne Müller
University of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Chronic infection with the gastric bacterial pathogen Helicobacter pylori causes gastritis and predisposes carriers to a high risk of developing gastric and duodenal ulcers, gastric cancer, and gastric lymphoma, but has also recently been shown to protect against certain allergic and chronic inflammatory disorders. The immunomodulatory properties that allow the bacteria to persist for decades in infected individuals in the face of a vigorous, yet ultimately non-protective, innate, and adaptive immune response may at the same time confer protection against allergies, asthma, and inflammatory bowel diseases. Experimental evidence from mouse models suggests that H. pylori has evolved to skew the adaptive immune response toward immune tolerance rather than immunity, which promotes persistent infection on the one hand, and inhibits auto-aggressive and allergic T-cell responses on the other. Regulatory T-cells mediating peripheral immune tolerance have emerged as key cellular players in facilitating persistent infection as well as protection from allergies, in both observational studies in humans and experimental work in mice. Recent data suggest that H. pylori actively targets dendritic cells to promote tolerance induction. The findings discussed in this review raise the possibility of harnessing the immunomodulatory properties of H. pylori for the prevention and treatment of allergic and auto-immune diseases, and also provide new insights relevant for H. pylori-specific vaccine development.

Indexed as

Immune ToleranceAnimalsChronic DiseaseDendritic CellsDisease Models, AnimalHelicobacter pyloriHumansHypersensitivityMiceT-Lymphocytes, Regulatoryasthma and allergiesdendritic cells and regulatory T-cellsHelicobacter immunomodulationimmune tolerance

Identifiers

PMID22919602
PMCPMC3417532
OpenAlexW2040549012

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.