Abstract:
CONTEXT:Psoralen and anastrozole are always used together for breast cancer patients in Chinese clinics. OBJECTIVE:This study investigates the effects of psoralen on the pharmacokinetics of anastrozole in rats and its potential mechanism. MATERIALS AND METHODS:The pharmacokinetics of orally administered anastrozole (0.5 mg/kg) with (test group) or without (Control group) psoralen pretreatment (20 mg/kg/day for 10 days) in male Sprague-Dawley rats (six rats in each group) were investigated. The plasma concentration of anastrozole was determined using a sensitive and reliable LC-MS/MS method. Additionally, the effects of psoralen on the intestine transport and metabolic stability of anastrozole (1 μM) were investigated using a Caco-2 cell transwell model and rat liver microsome incubation systems. RESULTS:The results indicated that psoralen could significantly increase the Cmax (from 56.74 ± 3.17 ng/mL to 83.26 ± 6.87 ng/mL), and t1/2 (from 10.80 ± 1.05 to 14.29 ± 1.38 h) of anastrozole (p < 0.05). Psoralen could also significantly decrease the efflux ratio of anastrozole from 1.88 to 1.32 (p < 0.05). Additionally, the intrinsic clearance rates of anastrozole decreased significantly (from 62.83 to 43.97 μL/min/mg protein) (p < 0.05) with psoralen pretreatment in rat liver microsome incubation systems. DISCUSSION AND CONCLUSIONS:This study indicates that when the rats were pretreated with psoralen, the system exposure of anastrozole would be increased significantly. The results showed that the herb-drug interaction between psoralen and anastrozole might occur when they were co-administered, and future studies in humans also need to investigate its herb-drug interaction potential.
journal_name
Pharm Bioljournal_title
Pharmaceutical biologyauthors
Zhang Y,Wu J,Zhou Y,Yin Y,Chen Hdoi
10.1080/13880209.2018.1501584subject
Has Abstractpub_date
2018-12-01 00:00:00pages
433-439issue
1eissn
1388-0209issn
1744-5116journal_volume
56pub_type
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journal_title:Pharmaceutical biology
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更新日期:2000-01-01 00:00:00
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