Evidence map›Paper›PMID 21383187›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Helicobacter pylori genome evolution during human infection.

Lynn Kennemann, Xavier Didelot, Toni Aebischer, Stefanie Kuhn, Bernd Drescher, Marcus Droege, Richard Reinhardt, Pelayo Correa, Thomas F Meyer, Christine Josenhans and 2 more

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 164 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
164citing papers in PubMed, 1 pooled it
25.3field-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

164 citing papers in PubMed, 1 synthesis or guideline pooled it, 262 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Microbiology and molecular biology reviews : MMBR · 2026
    Review
  4. Article
  5. Current drug discovery technologies · 2026
    Article
  6. Article
  7. International journal of molecular sciences · 2025
    Review
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Comments on 'Genotypic diversity of theJournal of medical microbiology · 2025
    Article
  14. Review
  15. Article
  16. Article
  17. Opportunities forMicroorganisms · 2024
    Review
  18. Article
  19. Pathogens (Basel, Switzerland) · 2024
    Review
  20. Review

104 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

12 authors at 7 institutions in 4 countries.

Lynn KennemannInstitute of Medical Microbiology and Hospital Epidemiology, Hannover Medical School, 30625 Hannover, Germany.
Xavier Didelot
Toni Aebischer
Stefanie Kuhn
Bernd Drescher
Marcus Droege
Richard Reinhardt
Pelayo Correa
Thomas F Meyer
Christine Josenhans
Daniel Falush
Sebastian Suerbaum
Medizinische Hochschule Hannover · DEMax Planck Institute for Infection Biology · DEMax Planck Institute for Plant Breeding Research · DERoche Pharma AG (Germany) · DEUniversity College Cork · IEUniversity of Oxford · GBVanderbilt University · US

Funding

Project 3 - Molecular Signatures of Gastric Carcinogenesis in the Host Response to H. pyloriP01CA028842 · NCI · VANDERBILT UNIVERSITY MEDICAL CENTER · PI WILSON, KEITH T. · 1985 to 2019
$15.8M
NCI NIH HHS P01 CA028842NCI NIH HHS P01CA028842
6 · The paper itself

Abstract

High genetic diversity is a hallmark of the gastric pathogen Helicobacter pylori. We used 454 sequencing technology to perform whole-genome comparisons for five sets of H. pylori strains that had been sequentially cultured from four chronically infected Colombians (isolation intervals=3-16 y) and one human volunteer experimentally infected with H. pylori as part of a vaccine trial. The four sets of genomes from Colombian H. pylori differed by 27-232 isolated SNPs and 16-441 imported clusters of polymorphisms resulting from recombination. Imports (mean length=394 bp) were distributed nonrandomly over the chromosome and frequently occurred in groups, suggesting that H. pylori first takes up long DNA fragments, which subsequently become partially integrated in multiple shorter pieces. Imports were present at significantly increased frequency in members of the hop family of outer membrane gene paralogues, some of which are involved in bacterial adhesion, suggesting diversifying selection. No evidence of recombination and few other differences were identified in the strain pair from an infected volunteer, indicating that the H. pylori genome is stable in the absence of mixed infection. Among these few differences was an OFF/ON switch in the phase-variable adhesin gene hopZ, suggesting strong in vivo selection for this putative adhesin during early colonization.

Indexed as

Evolution, MolecularGenomic InstabilityPolymorphism, Single NucleotideAdolescentChildChild, PreschoolFemaleGenome, BacterialGenome-Wide Association StudyHelicobacter InfectionsHelicobacter pyloriHumansMale

Identifiers

PMID21383187
PMCPMC3064335
OpenAlexW1967134059

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.