Evidence map›Paper›PMID 25452339›Full record

ArticleNucleic acids research2015

Comparative genomic analysis of Helicobacter pylori from Malaysia identifies three distinct lineages suggestive of differential evolution.

Narender Kumar, Vanitha Mariappan, Ramani Baddam, Aditya K Lankapalli, Sabiha Shaik, Khean-Lee Goh, Mun Fai Loke, Tim Perkins, Mohammed Benghezal, Seyed E Hasnain and 3 more

Abstract readComparative Study
In one paragraph

Article in Nucleic acids research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
–field-weighted citation impact
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

22 citing papers in PubMed.

  1. Antibiotic Resistance and Genetic Determinants ofInternational journal of molecular sciences · 2025
    Article
  2. Article
  3. Article
  4. A Survey ofAntimicrobial agents and chemotherapy · 2022
    Article
  5. Article
  6. Article
  7. Article
  8. PeerJ · 2021
    Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Draft Genome Sequences of 42Genome announcements · 2018
    Article
  14. [Research progress on genotyping ofZhejiang da xue xue bao. Yi xue ban = Journal of Zhejiang University. Medical sciences · 2018
    Review
  15. Article
  16. Whole Genome Sequence and Phylogenetic Analysis ShowFrontiers in cellular and infection microbiology · 2017
    Article
  17. Article
  18. Phylogenomics of ColombianGut pathogens · 2017
    Article
  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

13 authors.

Narender KumarPathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Gachibowli, Hyderabad, 500046, India.
Vanitha MariappanDepartment of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Ramani BaddamPathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Gachibowli, Hyderabad, 500046, India.
Aditya K LankapalliPathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Gachibowli, Hyderabad, 500046, India.
Sabiha ShaikPathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Gachibowli, Hyderabad, 500046, India.
Khean-Lee GohDepartment of Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Mun Fai LokeDepartment of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Tim PerkinsSchool of Pathology and Laboratory Medicine, University of Western Australia, Nedlands 6009, Western Australia, Australia.
Mohammed BenghezalSchool of Pathology and Laboratory Medicine, University of Western Australia, Nedlands 6009, Western Australia, Australia.
Seyed E HasnainKusuma School of Biological Sciences, Indian Institute of Technology, Hauz Khas, New Delhi, 110016, India.
Jamuna VadiveluDepartment of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Barry J MarshallSchool of Pathology and Laboratory Medicine, University of Western Australia, Nedlands 6009, Western Australia, Australia.
Niyaz AhmedPathogen Biology Laboratory, Department of Biotechnology and Bioinformatics, University of Hyderabad, Gachibowli, Hyderabad, 500046, India Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia niyaz.ahmed@uohyd.ac.in ahmed.nizi@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The discordant prevalence of Helicobacter pylori and its related diseases, for a long time, fostered certain enigmatic situations observed in the countries of the southern world. Variation in H. pylori infection rates and disease outcomes among different populations in multi-ethnic Malaysia provides a unique opportunity to understand dynamics of host-pathogen interaction and genome evolution. In this study, we extensively analyzed and compared genomes of 27 Malaysian H. pylori isolates and identified three major phylogeographic lineages: hspEastAsia, hpEurope and hpSouthIndia. The analysis of the virulence genes within the core genome, however, revealed a comparable pathogenic potential of the strains. In addition, we identified four genes limited to strains of East-Asian lineage. Our analyses identified a few strain-specific genes encoding restriction modification systems and outlined 311 core genes possibly under differential evolutionary constraints, among the strains representing different ethnic groups. The cagA and vacA genes also showed variations in accordance with the host genetic background of the strains. Moreover, restriction modification genes were found to be significantly enriched in East-Asian strains. An understanding of these variations in the genome content would provide significant insights into various adaptive and host modulation strategies harnessed by H. pylori to effectively persist in a host-specific manner.

Indexed as

Genome, BacterialDNA Restriction-Modification EnzymesEvolution, MolecularGenes, BacterialGenomicsHelicobacter pyloriHumansMalaysiaPhylogenyPhylogeographyVirulenceDNA Restriction-Modification Enzymes

Identifiers

PMID25452339
PMCPMC4288169

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.