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All Journal Narra J The Indonesian Journal of Gastroenterology, Hepatology and Digestive Endoscopy
Yoshio Yamaoka, Yoshio
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Biochemistry, Genetics & Molecular Biology Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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Helicobacter pylori sabA, hopQ and hom genotypes as potential genetic biomarkers for gastric mucosal inflammation Hunowu, Ramdan; Fauzia, Kartika A.; Alfaray, Ricky I.; Dewi, Selva R.; Juniastuti, Juniastuti; Yamaoka, Yoshio; Miftahussurur, Muhammad
Narra J Vol. 5 No. 2 (2025): August 2025
Publisher : Narra Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52225/narra.v5i2.1917

Abstract

Helicobacter pylori infection drives heterogeneous gastric pathologies, yet genotype-phenotype correlations in diverse populations remain underexplored. The aim of this cross-sectional study was to investigate the associations between H. pylori virulence genotypes (sabA, hopQ, hom family) and histopathological severity in gastric mucosa among 113 Indonesian dyspepsia patients (mean age: 49.6 years; male predominance: 64.6%). Whole-genome sequencing characterized virulence genotypes, while histopathological grading system using the Updated Sydney System assessed inflammation, atrophy, and bacterial density in the antral and corporal gastric regions. Phylogenetic analysis elucidated strain relatedness. Key genotype frequencies included sabA "on" (40.6%, 43/106), hopQ type I (53.7%, 43/80), and homCL (82.4%, 75/91). Statistical analysis revealed sabA "on" status significantly associated with elevated antral bacterial density (odds ratio (OR) 2.70 and 95% confidence interval (95%CI) 1.10–6.60, p=0.027). The homC variants (homCL/homCS) demonstrated robust associations with chronic inflammation severity (OR: 3.04; 95%CI: 0.99–9.36, p=0.046) and atrophy progression (OR: 4.78; 95%CI: 1.00–22.86, p=0.035), in contrast to the hopQ genotype, which showed no histopathological association. These findings indicated that sabA and homC as critical determinants of gastric microenvironment modulation, potentially through sabA-mediated colonization efficiency and homCL-babA synergistic interactions. While histological profiles predominantly indicated mild atrophy, widespread severe chronic inflammation signals latent progression risks.
New Paradigm of Gastric Pathogenesis: The Important Role of Gastric Microbiota Miftahussurur, Muhammad; Savitri, Camilia Metadea Aji; I'tishom, Reny; Rejeki, Purwo Sri; Rezkitha, Yudith Annisa Ayu; Yamaoka, Yoshio
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy Vol 23, No 1 (2022): VOLUME 23, NUMBER 1, April 2022
Publisher : The Indonesian Society for Digestive Endoscopy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.874 KB) | DOI: 10.24871/231202262-66

Abstract

Microbiota was deemed essential as it involved in energy metabolism, nutrient absorption, intestinal immune system maturation, and pathogen protection. Gastrointestinal microbiome played essential roles in human body, such as immune response regulation, pathogen colonization, and few other diseases.  The relation between gastric microbiota and host were difficult to explore for years due to unculturable microbes. Stomach with its acid production was presumed to be sterile and unfavorable for bacterial growth until the discovery of Helicobacter pylori. It dominates the stomach as it was estimated to colonize almost 50% global population. H. pylori infection was linked to the development of chronic gastritis and recognized as a definite carcinogen. There was a probability that the alteration of gastric microbiota likely influenced gastric immunobiology and possible gastric diseases. Recent studies showed that five phyla consist of Firmicutes, Bacteroidetes, Actinobacteria, Fusobacteria and Proteobacteria have been discovered in stomach mucosa which might contribute to the pathological process. In addition, genera such as Lactobacillus, Escherichia-Shigella, Lachnospiraceae, Burkholderia and Nitrospirae were considered to have a role on gastric carcinogenesis.
Co-Authors Alfaray, Ricky I. Dewi, Selva R. Fauzia, Kartika A. Hunowu, Ramdan I'tishom, Reny Iswan A Nusi Juniastuti Juniastuti Muhammad Miftahussurur Pangestu Adi Rejeki, Purwo Sri Savitri, Camilia Metadea Aji Ummi Maimunah Yudith Annisa Ayu Rezkitha, Yudith Annisa Ayu