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Effects of resveratrol on P-glycoprotein and cytochrome P450 3A in vitro and on pharmacokinetics of oral saquinavir in rats

Authors Li JP, Liu Y, Zhang JR, Yu XT, Wang XL, Zhao LB

Received 2 August 2016

Accepted for publication 8 September 2016

Published 15 November 2016 Volume 2016:10 Pages 3699—3706


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Dr Georgios D. Panos

Jiapeng Li,1,2 Yang Liu,2 Jingru Zhang,1,2 Xiaotong Yu,1,2 Xiaoling Wang,1 Libo Zhao1

1Department of Pharmacy, Beijing Children’s Hospital, Capital Medical University, 2Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, People’s Republic of China

Background: The intestinal cytochrome P450 3A (CYP 3A) and P-glycoprotein (P-gp) present a barrier to the oral absorption of saquinavir (SQV). Resveratrol (RESV) has been indicated to have modulatory effects on P-gp and CYP 3A. Therefore, this study was to investigate the effects of RESV on P-gp and CYP 3A activities in vitro and in vivo on oral SQV pharmacokinetics in rats.
Methods: In vitro, intestinal microsomes were used to evaluate RESV effect on CYP 3A-mediated metabolism of SQV; MDR1-expressing Madin–Darby canine kidney (MDCKII-MDR1) cells were employed to assess the impact of RESV on P-gp-mediated efflux of SQV. In vivo effects were studied using 10 rats randomly assigned to receive oral SQV (30 mg/kg) with or without RESV (20 mg/kg). Serial blood samples were obtained over the following 24 h. Concentrations of SQV in samples were ascertained using high-performance liquid chromatography-tandem mass spectrometry analysis.
Results: RESV (1–100 µM) enhanced residual SQV (% of control) in a dose-dependent manner after incubation with intestinal microsomes. RESV (1–100 µM) reduced the accumulation of SQV in MDCKII-MDR1 cells in a concentration-dependent manner. A double peaking phenomenon was observed in the plasma SQV profiles in rats. The first peak of plasma SQV concentration was increased, but the second peak was reduced by coadministration with RESV. The mean AUC0–∞ of SQV was slightly decreased, with no statistical significance probably due to the high individual variation.
Conclusion: RESV can alter the plasma SQV concentration profiles, shorten the Tmax of SQV. RESV might also cause a slight decrease tendency in the SQV bioavailability in rats.

Keywords: resveratrol, saquinavir, P-glycoprotein, CYP 3A, pharmacokinetic

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