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Association Study of Esomeprazole Pharmacokinetics and CYP2C19 Gene Polymorphisms
Yuan Fang1,2, Xia He1,2,3,4, Ai Peng1,2,3,4
1Department of Gastroenterology, West China Hospital, Sichuan University, Wuhou, Chengdu, P.R. China.
Clinical Pharmacology in Drug Development
|September 29, 2023
Summary
CYP2C19 gene variations significantly impact how the body processes esomeprazole (a proton pump inhibitor). This study found clear links between esomeprazole pharmacokinetics and these genetic differences in Chinese participants.
Area of Science:
- Pharmacogenomics
- Drug Metabolism
- Clinical Pharmacology
Background:
- Esomeprazole is a widely used proton pump inhibitor.
- CYP2C19 gene polymorphisms are known to affect drug metabolism.
- Understanding these variations is crucial for personalized medicine.
Purpose of the Study:
- To examine the relationship between esomeprazole pharmacokinetics and CYP2C19 gene polymorphisms.
- To assess how different CYP2C19 metabolizer statuses influence esomeprazole drug levels.
- To evaluate the safety and tolerability of esomeprazole in relation to genotype.
Main Methods:
- A cohort of 95 healthy Chinese participants was studied.
- Participants received oral doses of 20 mg or 40 mg esomeprazole.
- Genotyping for CYP2C19 was performed using PCR-RFLP; plasma concentrations were measured by HPLC-UV.
Main Results:
- Significant differences in esomeprazole's terminal elimination half-life and exposure (AUC/dose, Cmax/dose) were observed across CYP2C19 metabolizer groups (poor, intermediate, rapid).
- Time to maximum concentration did not show significant variation.
- No unexpected adverse events were reported for either 20 mg or 40 mg doses.
Conclusions:
- Esomeprazole metabolism is significantly influenced by CYP2C19 gene polymorphisms.
- These findings support the role of pharmacogenetics in optimizing esomeprazole therapy.
- Esomeprazole demonstrated good safety and tolerability in this study cohort.
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