ArticleBrazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]2020
Genetic variation in the cag pathogenicity island of Helicobacter pylori strains detected from gastroduodenal patients in Thailand.
Article in Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology], 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 2 of them syntheses that pooled 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.
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.
Who cites it
14 citing papers in PubMed, 2 syntheses or guidelines pooled it, 18 citations in OpenAlex.
- CagA toxin and risk of Helicobacter pylori-infected gastric phenotype: A meta-analysis of observational studies.PloS one · 2024Pooled it
- The global prevalence of gastric cancer in Helicobacter pylori-infected individuals: a systematic review and meta-analysis.BMC infectious diseases · 2023Pooled it
- Genomic characterization of clinical Helicobacter pylori strains from Korea: insights into phylogeny, pan-genome structure, and virulence factors.BMC microbiology · 2026Article
- Validation of the ABC Method for Gastric Cancer Risk Stratification Across Helicobacter pylori Infections With Diverse CagA Status and Subtypes in Brazil.Cancer medicine · 2025Article
- Detection of virulence genes in Helicobacter pylori and its correlation with drug resistance by polymerase chain reaction.European journal of medical research · 2025Article
- The Effect ofPathogens (Basel, Switzerland) · 2025Article
- Amino acid deletions at positions 893 and 894 of cytotoxin-associated gene A protein affectWorld journal of gastroenterology · 2024Article
- Prevalence of cagA, cagM, vacA and oipA genes in isolates of Helicobacter pylori obtained from hospital patients in Northeast Brazil.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2024Article
- Article
- Virulence gene polymorphisms in Shandong Helicobacter pylori strains and their relevance to gastric cancer.PloS one · 2024Article
- Is There a Real Relationship between the Presence ofInternational journal of microbiology · 2023Article
- Article
- Immunohistochemical Differentiation between Western and East Asian Types of CagA-PositiveCanadian journal of gastroenterology & hepatology · 2022Article
- Associations between seroprevalence ofThe Journal of international medical research · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 3 institutions in 2 countries.
Funding
Abstract
There is a lack of evidence of genetic variation in the Helicobacter pylori cag-PAI in Thailand, a region with the low incidence of gastric cancer. To clarify this issue, variation in the H. pylori cag-PAI in strains detected in Thailand was characterized and simultaneously compared with strains isolated from a high-risk population in Korea. The presence of ten gene clusters within cag-PAI (cagA, cagE, cagG, cagH, cagL, cagM, cagT, orf13, virB11, and orf10) and IS605 was characterized in H. pylori strains detected from these two countries. The cagA genotypes and EPIYA motifs were analyzed by DNA sequencing. The overall proportion of the ten cag-PAI genes that were detected ranged between 66 and 79%; additionally, approximately 48% of the strains from Thai patients contained an intact cag-PAI structure, while a significantly higher proportion (80%) of the strains from Korean patients had an intact cag-PAI. A significantly higher proportion of IS605 was detected in strains from Thai patients (55%). Analysis of cagA genotypes and EPIYA motifs revealed a higher frequency of Western-type cagA in Thai patients (87%) relative to Korean patients (8%) who were predominately associated with the East Asian-type cagA (92%). Variations in the Western-type cagA in the Thai population, such as EPIYA-BC patterns and EPIYA-like sequences (EPIYT), were mainly detected as compared with the Korean population (p < 0.05). In summary, H. pylori strains that colonize the Thai population tend to be associated with low virulence due to distinctive cag-PAI variation, which may partially explain the Asian paradox phenomenon in Thailand.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.