title: Increased Systemic Exposure of Methotrexate by a Polyphenol-Rich Herb via Modulation on Efflux Transporters Multidrug Resistance-Associated Protein 2 and Breast Cancer Resistance Protein.
abstract: Scutellariae radix (SR, roots of Scutellaria baicalensis Georgi), a popular Chinese medicine, contains plenty of flavonoids such as baicalin, wogonoside, baicalein, and wogonin. Methotrexate (MTX), an important immunosuppressant with a narrow therapeutic index, is a substrate of multidrug resistance-associated proteins (MRPs) and breast cancer resistance protein (BCRP). This study investigated the effect of SR on MTX pharmacokinetics and the underlying mechanisms. Rats were orally administered MTX alone and with 1.0 or 2.0 g/kg of SR. The serum concentrations of MTX were determined by a fluorescence polarization immunoassay. Cell models were used to explore the involvement of MRP2 and BCRP in the interaction. The results showed that 1.0 g/kg of SR significantly increased Cmax, AUC(0-30), AUC(0-2880), and mean residence time (MRT) of MTX by 50%, 45%, 501%, and 347%, respectively, and 2.0 g/kg of SR significantly enhanced the AUC(0-2880) and MRT by 242% and 293%, respectively, but decreased AUC(0-30) by 41%. Cell line studies indicated that SR activated the BCRP-mediated efflux transport, whereas the serum metabolites of SR inhibited both the BCRP- and MRP2-mediated efflux transports. In conclusion, SR ingestion increased the systemic exposure and MRT of MTX via modulation on MRP2 and BCRP.
authors: School of Pharmacy, China Medical University, Taichung 404, Taiwan, ROC.
authors: Chung-Ping
authors: CP
authors: Yu
authors: Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan, ROC.
authors: Yun-Chung
authors: YC
authors: Hsieh
authors: School of Pharmacy, China Medical University, Taichung 404, Taiwan, ROC.
authors: Chi-Sheng
authors: CS
authors: Shia
authors: School of Pharmacy, China Medical University, Taichung 404, Taiwan, ROC.
authors: Pei-Wen
authors: PW
authors: Hsu
authors: Graduate Institute of Pharmaceutical Chemistry, China Medical University, Taichung 404, Taiwan, ROC.
authors: Jen-Yuan
authors: JY
authors: Chen
authors: School of Pharmacy, China Medical University, Taichung 404, Taiwan, ROC; Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan, ROC. Electronic address: hou5133@gmail.com.
authors: Yu-Chi
authors: YC
authors: Hou
authors: School of Pharmacy, China Medical University, Taichung 404, Taiwan, ROC; Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan, ROC. Electronic address: yowenhsieh@gmail.com.
authors: Yo-Wen
authors: YW
authors: Hsieh
mesh_terms: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000187:drug effects / Q000378:metabolism*; D000818:Animals; D000963:Antimetabolites / Q000008:administration & dosage* / Q000493:pharmacokinetics* / Q000633:toxicity; D019540:Area Under Curve; D018938:Caco-2 Cells; D002470:Cell Survival / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D005419:Flavonoids / Q000494:pharmacology; D006801:Humans; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage* / Q000493:pharmacokinetics* / Q000633:toxicity; D028321:Plant Preparations / Q000494:pharmacology*; D059808:Polyphenols / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D031363:Scutellaria / Q000737:chemistry*
chemical_list: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; C423013:Abcc2 protein, rat; C489249:Abcg2 protein, rat; D000963:Antimetabolites; D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D028321:Plant Preparations; D059808:Polyphenols; C038044:baicalin; D008727:Methotrexate
keywords: BCRP; MRP2; herb-drug interaction; methotrexate; scutellariae radix