Effects of astragaloside IV on the pharmacokinetics of omeprazole in rats. (1st January 2019)

• Record Type: Journal Article
• Authors: Liu, Wei; Liu, Guozhi; Liu, Jing
• Is Part Of: Pharmaceutical biology. Volume 57:Number 1(2019)
• Page Start: 449
• Page End: 452
• Publication Date: 2019-01-01
• Subjects: CYP3A4 -- herb–drug interaction -- P-gp; Pharmacognosy -- Periodicals; Materia medica, Vegetable -- Periodicals; 615.321
• DOI: 10.1080/13880209.2019.1636828
• Languages: English
• ISSNs: 1388-0209

Abstract

Abstract: Context: Omeprazole and astragaloside IV (AS-IV) are widely used for the treatment of gastric ulcers in China clinics. Objective: This study investigates the effects of AS-IV on the pharmacokinetics of omeprazole in rats. Materials and methods: The pharmacokinetics of orally administered omeprazole (2 mg/kg), with or without AS-IV (100 mg/kg/day for 7 days) pretreatment, were investigated in male Sprague-Dawley rats (two groups of six animals each) using LC–MS/MS. A Caco-2 cell transwell model and rat liver microsome incubation systems were also used to support the in vivo pharmacokinetic data and investigate its potential mechanism. Results: The results indicated that co-administration of AS-IV could decrease the systemic exposure of omeprazole significantly ( p < 0.05), including AUC0– t (717.20 ± 177.63 vs. 1166.25 ± 186.65 ng h/mL) and C max (272.35 ± 25.81 vs. 366.34 ± 32.57 ng/mL). The t 1/2 of omeprazole also decreased significantly (1.78 ± 0.15 vs. 2.23 ± 0.27 h, p < 0.05). The efflux ratio of omeprazole across the Caco-2 cell transwell model increased significantly from 1.73 to 2.67 ( p < 0.05), and the metabolic stability of omeprazole was decreased from 42.6 ± 7.8 to 26.2 ± 5.1 min with the pretreatment of AS-IV ( p < 0.05). Discussion and conclusions: AS-IV could decrease the systemic exposure of omeprazole in rats when AS-IV and omeprazole were co-administered, and it might exert these effects through decreasing the absorption of omeprazole by inducing P-gp, or through accelerating the metabolism of omeprazole in rat liver by inducing the activity of CYP3A4.