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Watahiki D, Saito D, Nishida N, Tsuri H, Nomura K, Adachi Y, Taguchi M. Voriconazole injection may induce delayed methotrexate excretion: a case report and experimental study. J Pharm Health Care Sci 2022; 8:9. [PMID: 35351207 PMCID: PMC8966289 DOI: 10.1186/s40780-022-00240-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/16/2022] [Indexed: 11/10/2022] Open
Abstract
Background We report a case of delayed excretion of methotrexate (MTX) in a pediatric patient on high-dose MTX therapy in response to a change in the concomitant dosage of voriconazole from oral to intravenous. As the intravenous, but not the oral formulation of voriconazole includes sulfobutylether-β-cyclodextrin (SBECD), which has an anionic residue, we hypothesized that SBECD inhibits the renal excretion of anionic compounds. Methods We evaluated the inhibitory effects of SBECD on renal excretion of phenolsulfonphthalein (PSP), which is eliminated in urine via organic anion transport systems. PSP was administered intravenously to rats at 2.5 and 25 mg/kg with or without SBECD pretreatment (320 mg/kg). Results The plasma concentration of PSP at the dosage of 2.5 mg/kg were comparable between control and SBECD groups. On the other hand, at 25 mg/kg the elimination of PSP was delayed. The clearance of PSP at the dosage of 25 mg/kg was 9.71 ± 1.65 and 4.13 ± 0.76 mL/min/kg in control and SBECD groups, respectively (p < 0.05). This suggested that SBECD partly inhibits the renal excretion of anionic drugs. Conclusion The present case report discusses the delayed elimination of MTX in high dose therapy and possible mechanism involving SBECD as an excipient in concomitant drugs. It seems better to avoid choosing injection containing SBECD for patients undergoing HD-MTX treatment. Further studies are needed to confirm the inhibitory effects of SBECD on the renal excretion of MTX, especially in high-dose regimens.
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Affiliation(s)
- Daisuke Watahiki
- Department of Pharmacy Practice and Sciences, School of Pharmacy and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Daisuke Saito
- Department of Pharmacy Practice and Sciences, School of Pharmacy and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Naonori Nishida
- Department of Pediatrics, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Hiroyuki Tsuri
- Department of Pediatrics, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Keiko Nomura
- Department of Pediatrics, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Yuichi Adachi
- Department of Pediatrics, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - Masato Taguchi
- Department of Pharmacy Practice and Sciences, School of Pharmacy and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan.
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2
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Nakamura Y, Kozakai H, Nishio T, Yoshida K, Nakanishi T. Phenolsulfonphthalein as a surrogate substrate to assess altered function of the prostaglandin transporter SLCO2A1. Drug Metab Pharmacokinet 2022; 44:100452. [DOI: 10.1016/j.dmpk.2022.100452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/28/2022] [Accepted: 02/02/2022] [Indexed: 11/27/2022]
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Wang Z, Li Y, Peng T, Su Y, Luo X, Han W, Zhang H, Ruan J, Gui C. Human Organic Anion Transporting Polypeptides 1B1, 1B3, and 2B1 Are Involved in the Hepatic Uptake of Phenolsulfonphthalein. ACS OMEGA 2021; 6:35844-35851. [PMID: 34984313 PMCID: PMC8717568 DOI: 10.1021/acsomega.1c06163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 12/08/2021] [Indexed: 06/03/2023]
Abstract
Phenolsulfonphthalein (PSP or phenol red), a sulfonphthalein dye, has been used as a diagnostic agent and a pH indicator in cell culture medium. After administered into the body, PSP is excreted into urine and bile. The urinary excretion of PSP is mediated by organic anion transporter 1/3 (OAT1/3) and multidrug resistance protein 2 (MRP2). In biliary excretion, PSP is effluxed from hepatocytes into the bile via MRP2. However, so far, the molecular mechanism for PSP transport from the blood into hepatocytes is unclear. In the present study, six human major hepatic uptake transporters expressed on the basolateral membrane of hepatocytes, namely, organic anion transporting polypeptide 1B1 (OATP1B1), OATP1B3, OATP2B1, Na+/taurocholate cotransporting polypeptide (NTCP), organic cation transporter 1 (OCT1), and OAT2, have been investigated to see whether they are involved in the hepatic uptake of PSP. An in vitro cell-based study demonstrated that PSP is a substrate for OATP1B1, OATP1B3, and OATP2B1, with OATP1B3 showing the highest transport efficiency. The K m values for OATP1B1-, OATP1B3-, and OATP2B1-mediated PSP uptake were 11.3 ± 1.5, 7.0 ± 1.5, and 5.1 ± 1.0 μM, respectively. PSP interacts with known OATP substrates/inhibitors. However, the presence of PSP in cell culture medium has no significant effect on OATP's function. In vivo pharmacokinetic study in wild-type and Oatp1b2-knockout mice showed that Oatp1b2-knockout led to elevated plasma concentration and decreased liver accumulation of PSP. Taken together, the present study showed that in the liver, OATP1B1, OATP1B3, and OATP2B1 are involved in the uptake of PSP from the blood into hepatocytes, which, along with MRP2-mediated efflux of PSP from hepatocytes into the bile, constitute the vectorial transport of PSP from the blood to the bile and may play a critical role in the biliary excretion of PSP.
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Affiliation(s)
- Zhongmin Wang
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Ying Li
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Taotao Peng
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Ying Su
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Xiaoting Luo
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Wanjun Han
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Hongjian Zhang
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Jianqing Ruan
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
| | - Chunshan Gui
- College of Pharmaceutical
Sciences, Soochow University, 199 Renai Road, Suzhou Industrial
Park, Suzhou 215123, China
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Oh JH, Lee JH, Lee YJ. Evaluation of the Mrp2-mediated flavonoid-drug interaction potential of quercetin in rats and in vitro models. Asian J Pharm Sci 2019; 14:621-630. [PMID: 32104488 PMCID: PMC7032158 DOI: 10.1016/j.ajps.2018.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 11/30/2018] [Accepted: 12/06/2018] [Indexed: 01/13/2023] Open
Abstract
Quercetin is a biologically active flavonoid that has been used as a popular health supplement. It is reported that quercetin may cause flavonoid-drug interaction mediated by P-glycoprotein, the most predominant efflux transporter. In this study, we comprehensively evaluated the potential of the pharmacokinetic interaction of quercetin mediated by multidrug resistance-associated protein 2 (MRP2), another major efflux transporter. MRP2-transfected MDCKII cells and LS174T cells were used to evaluate the potential inhibition and induction of MRP2 by quercetin in vitro. To evaluate the induction effect of quercetin on Mrp2 in vivo, Mrp2 mRNA expression in rat liver, kidney, and small intestinal tissues was determined after the oral administration of quercetin (50, 100, or 250 mg/kg) for seven days. Mrp2-mediated interaction potential was also evaluated by the pharmacokinetic study of phenolsulfonphthalein in rats after single or multiple doses of quercetin. Additionally, the effect of quercetin on absorption of docetaxel, a P-glycoprotein and CYP3A4 substrate, was also evaluated. Quercetin inhibited the function of MRP2 at 10 µM and induced the mRNA expression of MRP2 at 50 µM in vitro. Additionally, at 100 mg/kg, quercetin markedly increased Mrp2 expression in the small intestine of rats. However, there was no significant change in phenolsulfonphthalein pharmacokinetics due to single- (50, 100, or 250 mg/kg) or multiple-dose (50, 100, or 250 mg/kg for seven days) quercetin co-administration. By contrast, a significant interaction caused by quercetin (100 mg/kg) was observed in the absorption of docetaxel. The results suggested that although quercetin modulates the function and expression of MRP2 in vitro, it may have a low potential of Mrp2-mediated interaction and present negligible safety concerns related to the interaction.
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Affiliation(s)
- Ju-Hee Oh
- Division of Biopharmaceutics, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Joo Hyun Lee
- Division of Biopharmaceutics, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Young-Joo Lee
- Division of Biopharmaceutics, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
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Lin SP, Yu CP, Hou YC, Huang CY, Ho LC, Chan SL. Transporter-mediated interaction of indican and methotrexate in rats. J Food Drug Anal 2018; 26:S133-S140. [PMID: 29703382 PMCID: PMC9326885 DOI: 10.1016/j.jfda.2017.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/31/2017] [Accepted: 11/01/2017] [Indexed: 01/24/2023] Open
Abstract
Indican (indoxyl-β-D-glucoside) is present in several Chinese herbs e.g. Isatis indigotica, Polygonum tinctorium and Polygonum perfoliatum. The major metabolite of indican was indoxyl sulfate (IS), an uremic toxin which was a known substrate/inhibitor of organic anion transporter (OAT) 1, OAT 3 and multidrug resistance-associated protein (MRP) 4. Methotrexate (MTX), an important immunosuppressant with narrow therapeutic window, is a substrate of OAT 1, 2, 3, 4 and MRP 1, 2, 3, 4. We hypothesized that IS, the major metabolite of oral indican, might inhibit the renal excretion of MTX mediated by OAT 1, OAT 3 and MRP 4. Therefore, this study investigated the effect of oral indican on the pharmacokinetics of MTX. Rats were orally given MTX with and without indican (20.0 and 40.0 mg/kg) in a parallel design. The serum MTX concentration was determined by a fluorescence polarization immunoassay. For mechanism clarification, phenolsulfonphthalein (PSP, 5.0 mg/kg), a probe substrate of OAT 1, OAT 3, MRP 2 and MRP 4, was intravenously given to rats with and without a intravenous bolus of IS (10.0 mg/kg) to measure the effect of IS on the elimination of PSP. The results indicated that 20.0 and 40.0 mg/kg of oral indican significantly increased the area under concentration–time curve0-t (AUC0-t) of MTX by 231% and 259%, prolonged the mean residence time (MRT) by 223% and 204%, respectively. Furthermore, intravenous IS significantly increased the AUC0-t of PSP by 204% and decreased the Cl by 68%. In conclusion, oral indican increased the systemic exposure and MRT of MTX through inhibition on multiple anion transporters including OAT 1, OAT 3 and MRP 4 by the major metabolite IS.
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Affiliation(s)
- Shiuan-Pey Lin
- School of Pharmacy, China Medical University, Taichung 404, Taiwan.
| | - Chung-Ping Yu
- Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan
| | - Yu-Chi Hou
- School of Pharmacy, China Medical University, Taichung 404, Taiwan; Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan
| | - Ching-Ya Huang
- Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan
| | - Lu-Ching Ho
- Department of Pharmacy, China Medical University Hospital, Taichung 404, Taiwan
| | - Shu-Ling Chan
- Graduate Institute of Pharmaceutical Chemistry, China Medical University, Taichung 404, Taiwan
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6
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Xu Q, Wang C, Meng Q, Liu Q, Sun P, Sun H, Guo X, Liu K. The oligopeptide transporter 2-mediated reabsorption of entecavir in rat kidney. Eur J Pharm Sci 2014; 52:41-7. [DOI: 10.1016/j.ejps.2013.10.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 09/16/2013] [Accepted: 10/16/2013] [Indexed: 11/17/2022]
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7
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Fukushima K, Miki T, Nakamoto K, Nishimura A, Koyama H, Ichikawa H, Shibata N, Tokuyama S, Sugioka N. Effect of intestinal atrophy and hepatic impairment induced by parenteral nutrition on drug absorption and disposition in rats. JPEN J Parenter Enteral Nutr 2013; 39:218-27. [PMID: 23894177 DOI: 10.1177/0148607113497759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Long-term parenteral nutrition (PN) has a high risk of hepatic dysfunction and intestinal atrophy. The present study investigated the effect of PN-induced intestinal atrophy and hepatic impairment on drug pharmacokinetics by using 2 contrasting compounds: phenolsulfonphthalein (PSP) and cyclosporin A (CyA). MATERIALS AND METHODS PSP or CyA was administered to 7-day PN-fed Rats (PN rats) and sham operated rats (control rats) via intravenous (IV) or intraloop administration of the intestine. Pharmacokinetic parameters with 2-compartment analysis including area under the concentration vs time curve (AUC) and the permeability after in situ intraloop administration (P loop) were obtained from both concentration profiles after different administration routes. RESULTS After IV administration of PSP to control and PN rats, there was no notable difference in any of the pharmacokinetic parameters. In contrast, after intraloop administration, AUC and P loop in PN rats were approximately 2.6- and 2.0-fold higher than that in control rats, respectively. On the other hand, after IV administration of CyA, the terminal half-life and total body clearance were prolonged and decreased in PN rats, respectively, resulting in 2.0-fold increase in AUC. After intraloop administration, the AUC of PN rats was increased to approximately 1.3-fold that of control rats, whereas no notable difference was observed in P loop. CONCLUSION The intestinal permeability of PSP was enhanced by intestinal atrophy induced by PN, while the metabolism of CyA was diminished by hepatic impairment by PN. These results revealed the physicochemical property-based pharmacokinetic alterations during PN; for a more detailed understanding, however, further studies are needed.
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Affiliation(s)
- Keizo Fukushima
- Department of Clinical Pharmacokinetics, Kobe Gakuin University, Hyogo, Japan
| | - Takahiro Miki
- Department of Clinical Pharmacokinetics, Kobe Gakuin University, Hyogo, Japan
| | - Kazuo Nakamoto
- Department of Clinical Pharmacy, Kobe Gakuin University, Hyogo, Japan
| | - Asako Nishimura
- Department of Biopharmaceutics, Doshisha Women's College of Liberal Arts, Kyoto, Japan
| | - Hikaru Koyama
- Department of Hospital Pharmacy, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hideki Ichikawa
- Department of Physical Pharmacy, Kobe Gakuin University, Hyogo, Japan
| | - Nobuhito Shibata
- Department of Biopharmaceutics, Doshisha Women's College of Liberal Arts, Kyoto, Japan
| | - Shogo Tokuyama
- Department of Clinical Pharmacy, Kobe Gakuin University, Hyogo, Japan
| | - Nobuyuki Sugioka
- Department of Clinical Pharmacokinetics, Kobe Gakuin University, Hyogo, Japan
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8
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Miao Q, Liu Q, Wang C, Meng Q, Guo X, Sun H, Peng J, Ma X, Kaku T, Liu K. Inhibitory effect of 1α,25-dihydroxyvitamin D3 on excretion of JBP485 via organic anion transporters in rats. Eur J Pharm Sci 2013. [DOI: 10.1016/j.ejps.2012.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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9
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Nomura M, Motohashi H, Sekine H, Katsura T, Inui KI. Developmental expression of renal organic anion transporters in rat kidney and its effect on renal secretion of phenolsulfonphthalein. Am J Physiol Renal Physiol 2012; 302:F1640-9. [DOI: 10.1152/ajprenal.00525.2011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Organic anion transporters (OAT1 and OAT3) and multidrug resistance-associated proteins (MRP2 and MRP4) play important roles in anionic drug secretion in renal proximal tubules. Changes in the expression of such transporters are considered to affect the tubular secretion of anionic drugs. The purpose of this study was to elucidate the developmental changes in the expression of OAT1, OAT3, MRP2, and MRP4 and their effects on the tubular secretion of drugs. The mRNA level of each transporter was measured by real-time PCR, and the protein expression was evaluated by Western blotting and immunohistochemical analysis. In addition, the tubular secretion of phenolsulfonphthalein (PSP) in infant (postnatal day 14) and adult rats was estimated based on in vivo clearance study. The protein expression of organic anion transporters were very low at postnatal day 0 and gradually increased with age. In postnatal day 14 rats, the expression of OAT1 and OAT3 seemed to be at almost mature levels, while MRP2 and MRP4 seemed to be at immature levels. Immunohistochemical analysis in the kidney of postnatal day 0 rats revealed OATs on the basolateral membrane and MRPs on the brush-border membrane. At postnatal day 0, the distribution of these transporters was restricted to the inner cortical region, while after postnatal day 14, it was identical to that in adult kidney. An in vivo clearance study revealed that the tubular secretion of PSP was significantly lower in postnatal day 14 rats than adult rats. These results indicate that age-dependent changes in organic anion transporter expression affect the tubular secretion of anionic drugs in pediatric patients.
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Affiliation(s)
- Maki Nomura
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University and
| | - Hideyuki Motohashi
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University and
- Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hiroko Sekine
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University and
| | - Toshiya Katsura
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University and
| | - Ken-ichi Inui
- Department of Pharmacy, Kyoto University Hospital, Faculty of Medicine, Kyoto University and
- Kyoto Pharmaceutical University, Kyoto, Japan
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10
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Zhu Y, Meng Q, Wang C, Liu Q, Sun H, Kaku T, Liu K. Organic anion transporters involved in the excretion of bestatin in the kidney. Peptides 2012; 33:265-71. [PMID: 22273603 DOI: 10.1016/j.peptides.2012.01.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 01/10/2012] [Accepted: 01/10/2012] [Indexed: 01/11/2023]
Abstract
Bestatin, a dipeptide, a low molecular weight aminopeptidase inhibitor, has been demonstrated to be an immunomodulator with an antitumor activity. However, the transporter-mediated renal excretion of bestatin is not fully understood. The purpose of this study was to elucidate the transporter-mediated renal excretion mechanism for bestatin. The plasma concentration of bestatin was increased markedly and both the accumulative renal excretion and renal clearance of bestatin were decreased significantly after intravenous administration of bestatin in combination with probenecid. p-Aminohippuric acid (PAH), a substrate of organic anion transporter (OAT) 1, benzylpenicillin (PCG), a substrate of OAT3 and JBP485, a substrate of OAT1 and OAT3, reduced the uptake of bestatin in rat kidney slices and in hOAT1- or hOAT3-HEK 293 cells. The accumulation of bestatin in hOAT1-HEK and hOAT3-HEK 293 cells was significantly greater than that in vector-HEK, and the K(m) and V(max) were 0.679 ± 0.007 mM and 0.807 ± 0.006 nmol/mg protein/30s for OAT1, 0.632 ± 0.014 mM and 1.303 ± 0.015 nmol/mg protein/30s for OAT3 respectively. PAH and JBP485 inhibited significantly the uptake of bestatin in hOAT1-HEK with the K(i) values of 92 ± 9 μM and 197 ± 21 μM; and PCG, JBP485 inhibited significantly the uptake of bestatin in hOAT3-HEK 293 cells with the K(i) values of 88 ± 12 μM and 160 ± 16 μM. Our results are novel in demonstrating for the first time that OAT1 and OAT3 are involved in the renal excretion of bestatin.
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Affiliation(s)
- Yanna Zhu
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Lvshunkou District, Dalian, China
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Functional analysis of phenolsulfonphthalein transport system in Long-Evans Cinnamon rats. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1778:270-5. [PMID: 17976528 DOI: 10.1016/j.bbamem.2007.09.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Revised: 09/25/2007] [Accepted: 09/27/2007] [Indexed: 11/20/2022]
Abstract
It has been reported that the transport function for organic anions on the kidney is maintained in multidrug resistance-associated protein 2 (Mrp2)-deficient rats. Different from Mrp2-deficient rats, Long-Evans Cinnamon (LEC) rats have impaired urinary excretion of Mrp2-substrate, phenolsulfonphthalein (PSP). PSP is transported by the potential-sensitive urate transport system in rat brush-border membranes. We analyzed the function of PSP transport system in LEC rats. Unlike Long-Evans Agouti (LEA) rats, the initial uptake of PSP and urate into the renal brush-border membrane vesicles of LEC rats were not significantly enhanced in the presence of positive intravesicular potential, suggesting that the potential-sensitive urate transport system is impaired in LEC rats. LEC rats should be useful for elucidating the potential-sensitive urate transport system in rats at the molecular level.
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12
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Saito Y, Itagaki S, Kubo S, Kobayashi M, Hirano T, Iseki K. Purification by p-aminobenzoic acid (PABA)-affinity chromatography and the functional reconstitution of the nateglinide/H+ cotransport system in the rat intestinal brush-border membrane. Biochem Biophys Res Commun 2005; 340:879-86. [PMID: 16403453 DOI: 10.1016/j.bbrc.2005.12.092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2005] [Accepted: 12/15/2005] [Indexed: 11/28/2022]
Abstract
(-)-N-(trans-4-isopropylcyclohexanecarbonyl)-D-phenylalanine (nateglinide) is a novel oral hypoglycemic agent possessing a peptide-type bond and a carboxyl group in its structure. Recently, we have shown that nateglinide transport occurs via the ceftibuten/H+ cotransport system, which is distinct from PepT1, and that the fluorescein/H+ cotransport system is involved in the uptake of nateglinide. The aim of this study was to characterize the functional properties of the intestinal nateglinide transporter. In the first part of this study, we demonstrated that the ceftibuten/H+ cotransport system is identical to the fluorescein/H+ cotransport system. We succeeded in purification of the nateglinide transporter from brush-border membranes of the rat small intestine using p-aminobenzoic acid (PABA)-affinity chromatography. We then investigated the functional properties of the nateglinide transporter using proteoliposomes prepared from the PABA-affinity chromatography elute. We demonstrated that nateglinide, ceftibuten, and fluorescein are transported by the same transporter in the intestine.
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Affiliation(s)
- Yoshitaka Saito
- Department of Clinical Pharmaceutics and Therapeutics, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12-jo, Nishi 6-chome, Kita-ku, Sapporo 060-0812, Japan
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Itagaki S, Chiba M, Shimamoto S, Sugawara M, Kobayashi M, Miyazaki K, Hirano T, Iseki K. Characterization of secretory intestinal transport of phenolsulfonphthalein. Drug Metab Pharmacokinet 2005; 20:72-8. [PMID: 15770077 DOI: 10.2133/dmpk.20.72] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It is known that secretory transport limits the oral bioavailability of certain drugs. However, there is little information on the secretion of anionic compounds in the intestine. Phenolsulfonphthalein (PSP) and p-aminohippuric acid (PAH) have been used widely as substrates for organic anion transport systems. PAH is transported in the secretory direction in the intestine. It is possible that PSP and PAH share the same transport system at the mucosal membrane. The purpose of this study was to characterize the transport system for PSP in the intestine. In the jejunum, the serosal-to-mucosal permeation rate of PSP was significantly reduced in an ATP-depleted condition, whereas a significant difference was not observed in the ileum. Some multidrug resistance-associated protein 2 (Mrp2) inhibitors inhibited PSP permeation in the jejunum. However, pravastatin, a substrate of Mrp2, did not inhibit the PSP permeation. The jejunal secretory transport of pravastatin was significantly reduced in an ATP-depleted condition and by addition of probenecid, but PSP did not affect the jejunal permeation of pravastatin. These results suggest that PSP is secreted into the intestinal lumen by Mrp2-like transporter and that two Mrp2 substrates, PSP and pravastatin, are likely to be transported by different transport systems at the mucosal membrane.
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Affiliation(s)
- Shirou Itagaki
- Department of Clinical Pharmaceutics & Therapeutics, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
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14
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Itagaki S, Shimamoto S, Sugawara M, Kobayashi M, Miyazaki K, Hirano T, Iseki K. Phenolsulfonphthalein transport by potential-sensitive urate transport system. Eur J Pharmacol 2005; 518:83-9. [PMID: 16083873 DOI: 10.1016/j.ejphar.2005.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2004] [Revised: 05/10/2005] [Accepted: 06/07/2005] [Indexed: 11/19/2022]
Abstract
The purpose of this study was to elucidate the transporter-mediated secretion systems for phenolsulfonphthalein in brush-border membranes. In human and rat renal brush-border membranes, a potential-sensitive transport system has been shown to be involved in the efflux of organic anions. The uptake of phenolsulfonphthalein into rat renal brush-border membrane vesicles was stimulated by an inside-positive membrane potential. This potential-sensitive uptake of phenolsulfonphthalein was inhibited by probenecid, pyrazinoate and urate. p-Aminohippurate had no effect on the potential-sensitive uptake of phenolsulfonphthalein. Moreover, urate competitively inhibited the uptake of phenolsulfonphthalein. On the other hand, the uptake of phenolsulfonphthalein was slightly increased in the presence of an outward Cl- gradient. These results suggest that phenolsulfonphthalein has high affinity for the potential-sensitive urate transport system but has low affinity for an anion exchanger.
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Affiliation(s)
- Shirou Itagaki
- Department of Clinical Pharmaceutics and Therapeutics, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita 12-jo, Nishi 6-chome, Kita-ku, Sapporo 060-0812, Japan
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Itagaki S, Saito Y, Kubo S, Otsuka Y, Yamamoto Y, Kobayashi M, Hirano T, Iseki K. H+-dependent transport mechanism of nateglinide in the brush-border membrane of the rat intestine. J Pharmacol Exp Ther 2004; 312:77-82. [PMID: 15316092 DOI: 10.1124/jpet.104.074021] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
(-)-N-(trans-4-Isopropylcyclohexanecarbonyl)-D-phenylalanine (nateglinide) is a novel oral hypoglycemic agent possessing a carboxyl group and a peptide-type bond in its structure. Although nateglinide quickly reaches the maximal serum concentration after oral administration, nateglinide itself is not transported by PepT1 or MCT1. The aim of this study was to characterize the transporters on the apical side of the small intestine that are responsible for the rapid absorption of nateglinide. The uptake of nateglinide by rat intestinal brush-border membrane vesicles is associated with a proton-coupled transport system. Ceftibuten competitively inhibited H(+)-dependent nateglinide uptake. Glycylsarcosine (Gly-Sar), cephradine, and cephalexin did not significantly inhibit the uptake of nateglinide. The combination of Gly-Sar and nateglinide greatly reduced the uptake of ceftibuten. The effect of the combined treatment was significantly greater than that of Gly-Sar alone. Furthermore, nateglinide competitively inhibited H(+)-driven ceftibuten transporter-mediated ceftibuten uptake. Ceftibuten transport occurs via at least two H(+)-dependent transport systems: one is PepT1, and the other is the ceftibuten/H(+) cotransport system. On the other hand, we demonstrated that nateglinide transport occurs via a single system that is H(+) dependent but is distinct from PepT1 and may be identical to the ceftibuten/H(+) cotransport system.
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Affiliation(s)
- Shirou Itagaki
- Department of Clinical Pharmaceutics and Therapeutics, Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12-jo, Nishi-6-chome, Kita-ku, Sapporo 060-0812, Japan
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Itagaki S, Sugawara M, Kobayashi M, Miyazaki K, Hirano T, Iseki K. Comparison of the Disposition Behavior of Organic anions in an Animal Model for Wilson's Disease (Long-Evans Cinnamon rats) with that in Normal Long-Evans Agouti rats. Drug Metab Pharmacokinet 2004; 19:150-4. [PMID: 15499181 DOI: 10.2133/dmpk.19.150] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Long-Evans Cinnamon (LEC) rats have an abnormality similar to that observed in Wilson's disease in humans and are therefore a good animal model for the study of Wilson's disease. LEC rats develop hereditary hepatitis and severe jaundice. Mutant animals with hyperbilirubinemia have been widely used as animal models for human diseases. Among these mutant animals, Eisai hyperbilirubinemic rats (EHBR) have defective biliary excretion of organic anions. Thus, biliary excretion of sulfobromophthalein (BSP) and urinary excretion of phenolsulfonphthalein (PSP) in LEC rats were compared with those in Long-Evans Agouti (LEA) rats. In LEC rats, the excretion of BSP, a multidrug resistance-associated protein 2 (Mrp2/Abcc2) substrate, was significantly decreased compared to that in LEA rats. It has been reported that the transport function for organic anions on the kidney is maintained in EHBR. However, the urinary excretion of PSP is impaired in LEC rats. It is possible that organic anion transporters responsible for the urinary excretion of PSP in LEA rats and EHBR are impaired in LEC rats. It is important to elucidate the relationship between organic anion secretion and Wilson's disease.
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Affiliation(s)
- Shirou Itagaki
- Department of Clinical Pharmaceutics and Therapeutics, Graduate School of Pharmaceutical Sciences, Hokkaido University
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