| Introduction: It has been proposed that specific analysis of Helicobacter pylori virulence factors can be suitable for
predicting of post H. pylori infection disorders like gastric cancer (GC). The present study was designed to
evaluate the association between different virulence factors of H. pylori and GC.
Methods: Studies investigated the association between virulence factors of H. pylori and GC were collected from
the several databases. All analysis was performed by Comprehensive Meta-Analysis V2.2 software (Biostat,
Englewood, NJ, USA).
Results: Based on a comprehensive literature search, 25 eligible studies were included for meta-analyses.
Infection with cagA- and vacA s1m1-positive H. pylori strains were significantly associated with increased risk of
GC (OR of [2.82 (95% CI 1.96–4.06), P < 0.001]) and ([1.75 (95% CI 1.04–2.96), P 0.034)], respectively.
Conclusions: Infection by H. pylori strains with positive vacA s1m1 and the cagA genes can significantly increase
the risk of GC. The association between the vacA s1m1 and the cagA and GC, suggests that screening of these
genes may be helpful for identifying populations at higher risk for GC. |