Helicobacter pylori eradication for preventing gastric cancer
摘要
Helicobacter pylori(H.pylori)infection is a major riskfactor for gastric cancer(GC)development,which isone of the most challenging malignant diseases worldwide with limited treatments.In the multistep pathogenesis of GC,H.pylori infection slowly induces chronicactive gastritis,which progresses through the premalignant stages of atrophic gastritis,intestinal metaplasia,and dysplasia,and then finally to GC.Although eradication of H.pylori is a reasonable approach for the prevention of GC,there have been some contradictory reports,with only some long-term follow-up data showingefficacy of this approach.The inconsistencies are likely due to the insufficient number of participants,relatively short follow-up periods,poor quality of study designs,and the degree and extent of preneoplastic changes atthe time of H.pylori eradication.This review analyzesrecent high-quality studies to resolve the discrepancies regarding the eradication of H.pylori for GC prevention.The relationship between H.pylori eradication and GC/precancerous lesions/metachronous GC is examined,and the cost-effectiveness of this strategy in the prevention of GC is assessed.Although it is assumed that eradication of H.pylori has the potential to prevent GC,the feasibility and appropriate timing of this strategy for cancer prevention remain to be determined.As a result,additional well-designed trials with longer followup periods are needed to clarify this issue.