ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (2): 422-431.doi: 10.11843/j.issn.0366-6964.2018.02.022

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Effect of Quercetin on P-glycoprotein Expression and Efflux Function in Liver and Jejunum of Rat

HE Fang, Bhutto Zohaib, GUO Li, WANG Li-ping*   

  1. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2017-08-16 Online:2018-02-23 Published:2018-02-23

Abstract:

P-glycoprotein (P-gp), encoded by ABCB1/Mdr1, is a most important member of ABC family efflux transporter dictating the bioavailability of the various xenobiotics. The expression and function of P-gp can be influenced by other xenobiotics. The aim of the study is to explore the effect of quercetin, a promising herbal additive, on the expression and function of P-gp as well as the drug-drug interaction. Randomly selected rats were grouped and treated by quercetin (15 and 60 mg·kg-1) for 5 and 15 days, respectively. mdr1a, mdr1b, PXR and CAR gene mRNA expression level and P-gp protein expression level and location were detected by real-time RT-PCR, Western bolt and immunohistochemistry, respectively. Single-pass intestinal perfusion was used to explore the effect of quercetin on ivermectin permeability in jejunum for another 12 rats wite quercetin for 15 days. Finally, ATPase activity was detected in quercetin-treated Caco-2 cells by using ATP-kit assay. Results were as follows:Quercetin can upregulate the mRNA expression level of mdr1a, mdr1b, PXR and CAR in rats liver and jejunum (P<0.05, P<0.01) as well as P-gp expression level (P<0.01). There is a correlation between P-gp and CAR expression level (P<0.05). Single pass intestinal perfusion experiment proved that quercetin affected the permeability of ivermectin in jejunum with declining Ka and Papp values (P<0.05). Compared with the control group, quercetin significantly induced the ATPase activity in Caco-2 cells (P<0.01). Quercetin upregulated the P-gp expression in liver and jejunum which was transcriptionally regulated through the activation of nuclear receptors (CAR), accordingly, affected the efflux transport of ivermectin from jejunum in the rats. This may have significant implications for long term use of quercetin causing drug-drug interaction during pharmacotherapy.

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