Abstract
Proton pump inhibitors (PPI) are mainly metabolized by cytochrome P450 2C19 (CYP2C19) in the liver. We investigated whether the CYP2C19 genotype plays a role in the eradication rate of Helicobacter pylori (H. pylori) infection in patients receiving pantoprazole- or esomeprazole-based triple therapy. A total of 327 patients infected with H. pylori were treated with either pantoprazole or esomeprazole, plus amoxicillin and clarithromycin for 7 days. The presence of the CYP2C19 genotype was determined by pyrosequencing. The overall H. pylori eradication rate was 85%; 82.6% for the PAC regimen, and 88.3% for the EAC regimen; the differences were not statistically significant. The overall eradication rate in the poor metabolizer groups (PM) was significantly higher than in the extensive metabolizer groups (EM) (97.4% vs 83.3%; P = 0.016). The eradication rates in the EM and PM groups were 80.8% and 95.7% for the PAC regimen and 86.8% and 100% for the EAC regimen, respectively. The results of this study suggest that the CYP2C19 genotype status may play a role in the H. pylori eradication rate in patients receiving pantoprazole or esomeprazole-based triple therapy.
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