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Nozaki Y, Izumi S. Preincubation Time-Dependent, Long-Lasting Inhibition of Drug Transporters and Impact on the Prediction of Drug-Drug Interactions. Drug Metab Dispos 2023; 51:1077-1088. [PMID: 36854606 DOI: 10.1124/dmd.122.000970] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 02/05/2023] [Accepted: 02/21/2023] [Indexed: 03/02/2023] Open
Abstract
Transporter-mediated drug-drug interaction (DDI) is of clinical concern, and the quantitative prediction of DDIs is an indispensable part of drug development. Cell-based inhibition assays, in which a representative probe substrate and a potential inhibitor are coincubated, are routinely performed to assess the inhibitory potential of new molecular entities on drug transporters. However, the inhibitory effect of cyclosporine A (CsA) on organic anion transporting polypeptide (OATP) 1B1 is substantially potentiated with CsA preincubation, and this effect is both long-lasting and dependent on the preincubation time. This phenomenon has also been reported with transporters other than OATP1Bs, but it is considered more prevalent among OATP1Bs and organic cation transporters. Regulatory agencies have also noted this preincubation effect and have recommended that pharmaceutical companies consider inhibitor preincubation when performing in vitro OATP1B1 and OATP1B3 inhibition studies. Although the underlying mechanisms responsible for the preincubation effect are not fully understood, a trans-inhibition mechanism was recently demonstrated for OATP1B1 inhibition by CsA, in which CsA inhibited OATP1B1 not only extracellularly (cis-inhibition) but also intracellularly (trans-inhibition). Furthermore, the trans-inhibition potency of CsA was much greater than that of cis-inhibition, suggesting that trans-inhibition might be a key driver of clinical DDIs of CsA with OATP1B substrate drugs. Although confidence in transporter-mediated DDI prediction is generally considered to be low, the predictability might be further improved by incorporating the trans-inhibition mechanism into static and dynamic models for preincubation-dependent inhibitors of OATP1Bs and perhaps other transporters. SIGNIFICANCE STATEMENT: Preincubation time-dependent, long-lasting inhibition has been observed for OATP1B1 and other solute carrier transporters in vitro. Recently, a trans-inhibition mechanism for the preincubation effect of CsA on OATP1B1 inhibition was identified, with the trans-inhibition potency being greater than that of cis-inhibition. The concept of trans-inhibition may allow us to further understand the mechanism of transporter-mediated DDIs not only for OATP1B1 but also for other transporters and to improve the accuracy and confidence of DDI predictions.
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Affiliation(s)
- Yoshitane Nozaki
- Global Drug Metabolism and Pharmacokinetics, Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3, Tokodai, Tsukuba, Ibaraki, 300-2635, Japan (Y.N., S.I.)
| | - Saki Izumi
- Global Drug Metabolism and Pharmacokinetics, Tsukuba Research Laboratories, Eisai Co., Ltd., 5-1-3, Tokodai, Tsukuba, Ibaraki, 300-2635, Japan (Y.N., S.I.)
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Kitamura K, Okamoto A, Morio H, Isogai R, Ito R, Yamaura Y, Izumi S, Komori T, Ito S, Ohtsuki S, Akita H, Furihata T. Human Immortalized Cell-Based Blood-Brain Barrier Spheroid Models Offer an Evaluation Tool for the Brain Penetration Properties of Macromolecules. Mol Pharm 2022; 19:2754-2764. [PMID: 35766901 DOI: 10.1021/acs.molpharmaceut.2c00120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Blood-brain barrier (BBB)-permeable middle- or macromolecules (middle/macromolecules) have recently attracted significant attention as new drug delivery carriers into the human brain via receptor-mediated transcytosis (RMT). During the development process of such carriers, it is necessary to thoroughly evaluate their human BBB permeability levels. In such evaluations, our recently established human immortalized cell-based multicellular spheroidal BBB models (hiMCS-BBB models) have shown high potential. However, the specifics of those capabilities have yet to be elucidated. Therefore, in this study, we characterize the ability of the hiMCS-BBB models to evaluate RMT-mediated BBB penetration properties of middle/macromolecules. More specifically, we began by validating transferrin receptor (TfR)-mediated RMT functionalities using transferrin in the hiMCS-BBB models and then examined the BBB permeability levels of MEM189 antibodies (known BBB-permeable anti-TfR antibodies). The obtained results showed that, as with the case of transferrin, temperature-dependent uptake of MEM189 antibodies was observed in the hiMCS-BBB models, and the extent of that uptake increased in a time-dependent manner until reaching a plateau after around 2 h. To further expand the evaluation applicability of the models, we also examined the BBB permeability levels of the recently developed SLS cyclic peptide and observed that peptide uptake was also temperature-dependent. To summarize, our results show that the hiMCS-BBB models possess the ability to evaluate the RMT-mediated BBB-permeable properties of antibodies and peptides and thus have the potential to provide valuable tools for use in the exploration and identification of middle/macromolecules showing excellent BBB permeability levels, thereby contributing powerfully to the development of new drug delivery carriers for transporting drugs into the human brain.
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Affiliation(s)
- Keita Kitamura
- Laboratory of DDS Design and Drug Disposition, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8670, Japan.,Laboratory of Clinical Pharmacy & Experimental Therapeutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Ayaka Okamoto
- Laboratory of Clinical Pharmacy & Experimental Therapeutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Hanae Morio
- Laboratory of Clinical Pharmacy & Experimental Therapeutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Ryuto Isogai
- Laboratory of Clinical Pharmacy & Experimental Therapeutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
| | - Ryo Ito
- Research Center of Neurology, Ono Pharmaceutical Co., Ltd., Osaka 618-8585, Japan
| | - Yoshiyuki Yamaura
- Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Osaka 618-8585, Japan
| | - Saki Izumi
- Global Drug Metabolism and Pharmacokinetics, Tsukuba Research Laboratories, Eisai Co. Ltd., 5-1-3 Tokodai, Ibaraki 300-2635, Japan
| | - Takafumi Komori
- Global Drug Metabolism and Pharmacokinetics, Tsukuba Research Laboratories, Eisai Co. Ltd., 5-1-3 Tokodai, Ibaraki 300-2635, Japan
| | - Shingo Ito
- Department of Pharmaceutical Microbiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 862-0973, Japan
| | - Sumio Ohtsuki
- Department of Pharmaceutical Microbiology, Faculty of Life Sciences, Kumamoto University, Kumamoto 862-0973, Japan
| | - Hidetaka Akita
- Laboratory of DDS Design and Drug Disposition, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-8670, Japan
| | - Tomomi Furihata
- Laboratory of Clinical Pharmacy & Experimental Therapeutics, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
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Izumi S, Nozaki Y, Lee W, Sugiyama Y. Experimental and modeling evidence supporting the trans-inhibition mechanism for preincubation time-dependent, long-lasting inhibition of organic anion transporting polypeptide (OATP) 1B1 by cyclosporine A. Drug Metab Dispos 2022; 50:541-551. [PMID: 35241487 DOI: 10.1124/dmd.121.000783] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/14/2022] [Indexed: 11/22/2022] Open
Abstract
Cyclosporine A (CsA) and rifampin are potent inhibitors of organic anion transporting polypeptide (OATP) 1B1 and are widely used to assess the risk for drug-drug interactions. CsA displays preincubation time-dependent, long-lasting inhibition of OATP1B1 in vitro and in rats in vivo, and a proposed mechanism is the trans-inhibition by which CsA inhibits OATP1B1 from the inside of cells. The current study aimed to experimentally validate the proposed mechanism using HEK293 cells stably expressing OATP1B1. The uptake of CsA reached a plateau following around 60-min incubation, with the cell-to-buffer concentration ratio of 3930, reflective of the high-affinity, high-capacity intracellular binding of CsA. The time course of CsA uptake was analyzed to estimate the kinetic parameters for permeability clearance and intracellular binding. When the OATP1B1-mediated uptake of [3H]estradiol-17β-glucuronide was measured following preincubation with CsA for 5 to 120 min, apparent Ki values became lower with longer preincubation. Our kinetic modeling incorporated the two reversible inhibition constants [Ki,trans and Ki,cis for the inhibition from inside (trans-inhibition) and outside (cis-inhibition) of cells, respectively] and estimated Ki,trans value of CsA was smaller by 48-fold than the estimated Ki,cis value. Rifampin also displayed preincubation time-dependent inhibition of OATP1B1, albeit the extent of enhancement was only 2-fold. The current study provides experimental evidence for the preincubation time-dependent shift of apparent Ki values and a mechanistic basis for physiologically based pharmacokinetic modeling that incorporates permeability clearance, extensive intracellular binding, and asymmetry of Ki values between the inside and outside of cells. Significance Statement In vitro data and kinetic modeling support that preincubation time-dependent, long-lasting inhibition of OATP1B1 by CsA can be explained by the extensive intracellular binding and reversible OATP1B1 inhibition intracellularly (trans-inhibition) as well as extracellularly (cis-inhibition). For inhibitors to display time-dependency, the following factors were found important: time to reach a steady-state cellular concentration, trans-inhibition potency relative to cis-inhibition, and the degree of cellular inhibitor accumulation. This study would aid in the accurate prediction of drug-drug interactions mediated by OATP1B1 inhibition.
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Affiliation(s)
| | | | - Wooin Lee
- Seoul National University, Korea, Republic of
| | - Yuichi Sugiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Japan
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Banzai K, Izumi S. Cis-regulatory elements of the cholinergic gene locus in the silkworm Bombyx mori. Insect Mol Biol 2022; 31:73-84. [PMID: 34549831 DOI: 10.1111/imb.12739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Genes of choline acetyltransferase (ChAT) and vesicular acetylcholine transporter are encoded in the same gene locus, called the cholinergic gene locus. They are essential in cholinergic neurons to maintain their functional phenotype. The genomic structure of the cholinergic gene locus is conserved among invertebrates to mammals. However, the cholinergic gene expression in a specific subset of neurons is unknown in insects except for Drosophila melanogaster. In this study, we analysed the upstream sequence of cholinergic gene locus in the silkworm Bombyx mori to identify specific cis-regulatory regions. We found multiple enhancer regions that are localized within 1 kb upstream of the cholinergic gene locus. The combination of promoter assays using small deletions and bioinformatic analysis among insect species illuminates two conserved sequences in the cis-regulatory region: TGACGTA and CCAAT, which are known as the cAMP response element and CAAT box, respectively. We found that dibutyryl-cAMP, an analogue of cAMP, influences the expression of ChAT in B. mori. Tissue-specific expression analysis of transcriptional factors identified potential candidates that control the cholinergic gene locus expression. Our investigation provides new insight into the regulation mechanism of cholinergic neuron-specific gene machinery in this lepidopteran insect.
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Affiliation(s)
- K Banzai
- Department of Biological Sciences, Kanagawa University, Hiratsuka, Kanagawa, Japan
| | - S Izumi
- Department of Biological Sciences, Kanagawa University, Hiratsuka, Kanagawa, Japan
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Wells AU, Flaherty KR, Brown KK, Inoue Y, Devaraj A, Richeldi L, Moua T, Crestani B, Wuyts WA, Stowasser S, Quaresma M, Goeldner RG, Schlenker-Herceg R, Kolb M, Aburto M, Acosta O, Andrews C, Antin-Ozerkis D, Arce G, Arias M, Avdeev S, Barczyk A, Bascom R, Bazdyrev E, Beirne P, Belloli E, Bergna M, Bergot E, Bhatt N, Blaas S, Bondue B, Bonella F, Britt E, Buch K, Burk J, Cai H, Cantin A, Castillo Villegas D, Cazaux A, Cerri S, Chaaban S, Chaudhuri N, Cottin V, Crestani B, Criner G, Dahlqvist C, Danoff S, Dematte D'Amico J, Dilling D, Elias P, Ettinger N, Falk J, Fernández Pérez E, Gamez-Dubuis A, Giessel G, Gifford A, Glassberg M, Glazer C, Golden J, Gómez Carrera L, Guiot J, Hallowell R, Hayashi H, Hetzel J, Hirani N, Homik L, Hope-Gill B, Hotchkin D, Ichikado K, Ilkovich M, Inoue Y, Izumi S, Jassem E, Jones L, Jouneau S, Kaner R, Kang J, Kawamura T, Kessler R, Kim Y, Kishi K, Kitamura H, Kolb M, Kondoh Y, Kono C, Koschel D, Kreuter M, Kulkarni T, Kus J, Lebargy F, León Jiménez A, Luo Q, Mageto Y, Maher T, Makino S, Marchand-Adam S, Marquette C, Martinez R, Martínez M, Maturana Rozas R, Miyazaki Y, Moiseev S, Molina-Molina M, Morrison L, Morrow L, Moua T, Nambiar A, Nishioka Y, Nunes H, Okamoto M, Oldham J, Otaola M, Padilla M, Park J, Patel N, Pesci A, Piotrowski W, Pitts L, Poonyagariyagorn H, Prasse A, Quadrelli S, Randerath W, Refini R, Reynaud-Gaubert M, Riviere F, Rodríguez Portal J, Rosas I, Rossman M, Safdar Z, Saito T, Sakamoto N, Salinas Fénero M, Sauleda J, Schmidt S, Scholand M, Schwartz M, Shapera S, Shlobin O, Sigal B, Silva Orellana A, Skowasch D, Song J, Stieglitz S, Stone H, Strek M, Suda T, Sugiura H, Takahashi H, Takaya H, Takeuchi T, Thavarajah K, Tolle L, Tomassetti S, Tomii K, Valenzuela C, Vancheri C, Varone F, Veeraraghavan S, Villar A, Weigt S, Wemeau L, Wuyts W, Xu Z, Yakusevich V, Yamada Y, Yamauchi H, Ziora D. Nintedanib in patients with progressive fibrosing interstitial lung diseases-subgroup analyses by interstitial lung disease diagnosis in the INBUILD trial: a randomised, double-blind, placebo-controlled, parallel-group trial. Lancet Respir Med 2020; 8:453-460. [PMID: 32145830 DOI: 10.1016/s2213-2600(20)30036-9] [Citation(s) in RCA: 263] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/06/2020] [Accepted: 01/16/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND The INBUILD trial investigated the efficacy and safety of nintedanib versus placebo in patients with progressive fibrosing interstitial lung diseases (ILDs) other than idiopathic pulmonary fibrosis (IPF). We aimed to establish the effects of nintedanib in subgroups based on ILD diagnosis. METHODS The INBUILD trial was a randomised, double-blind, placebo-controlled, parallel group trial done at 153 sites in 15 countries. Participants had an investigator-diagnosed fibrosing ILD other than IPF, with chest imaging features of fibrosis of more than 10% extent on high resolution CT (HRCT), forced vital capacity (FVC) of 45% or more predicted, and diffusing capacity of the lung for carbon monoxide (DLco) of at least 30% and less than 80% predicted. Participants fulfilled protocol-defined criteria for ILD progression in the 24 months before screening, despite management considered appropriate in clinical practice for the individual ILD. Participants were randomly assigned 1:1 by means of a pseudo-random number generator to receive nintedanib 150 mg twice daily or placebo for at least 52 weeks. Participants, investigators, and other personnel involved in the trial and analysis were masked to treatment assignment until after database lock. In this subgroup analysis, we assessed the rate of decline in FVC (mL/year) over 52 weeks in patients who received at least one dose of nintedanib or placebo in five prespecified subgroups based on the ILD diagnoses documented by the investigators: hypersensitivity pneumonitis, autoimmune ILDs, idiopathic non-specific interstitial pneumonia, unclassifiable idiopathic interstitial pneumonia, and other ILDs. The trial has been completed and is registered with ClinicalTrials.gov, number NCT02999178. FINDINGS Participants were recruited between Feb 23, 2017, and April 27, 2018. Of 663 participants who received at least one dose of nintedanib or placebo, 173 (26%) had chronic hypersensitivity pneumonitis, 170 (26%) an autoimmune ILD, 125 (19%) idiopathic non-specific interstitial pneumonia, 114 (17%) unclassifiable idiopathic interstitial pneumonia, and 81 (12%) other ILDs. The effect of nintedanib versus placebo on reducing the rate of FVC decline (mL/year) was consistent across the five subgroups by ILD diagnosis in the overall population (hypersensitivity pneumonitis 73·1 [95% CI -8·6 to 154·8]; autoimmune ILDs 104·0 [21·1 to 186·9]; idiopathic non-specific interstitial pneumonia 141·6 [46·0 to 237·2]; unclassifiable idiopathic interstitial pneumonia 68·3 [-31·4 to 168·1]; and other ILDs 197·1 [77·6 to 316·7]; p=0·41 for treatment by subgroup by time interaction). Adverse events reported in the subgroups were consistent with those reported in the overall population. INTERPRETATION The INBUILD trial was not designed or powered to provide evidence for a benefit of nintedanib in specific diagnostic subgroups. However, its results suggest that nintedanib reduces the rate of ILD progression, as measured by FVC decline, in patients who have a chronic fibrosing ILD and progressive phenotype, irrespective of the underlying ILD diagnosis. FUNDING Boehringer Ingelheim.
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Affiliation(s)
- Athol U Wells
- National Institute for Health Research Respiratory Biomedical Research Unit, Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Kevin R Flaherty
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Kevin K Brown
- Department of Medicine, National Jewish Health, Denver, CO, USA
| | - Yoshikazu Inoue
- Clinical Research Center, National Hospital Organization Kinki-Chuo Chest Medical Center, Sakai City, Osaka, Japan
| | - Anand Devaraj
- Department of Radiology, Royal Brompton and Harefield NHS Foundation Trust, London, UK; National Heart and Lung Institute, Imperial College, London, UK
| | - Luca Richeldi
- Fondazione Policlinico A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Teng Moua
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic Rochester, Rochester, MN, USA
| | - Bruno Crestani
- Université de Paris, Inserm U1152, APHP, Hôpital Bichat, Centre de reference constitutif pour les maladies pulmonaires rares, Paris, France
| | - Wim A Wuyts
- Unit for Interstitial Lung Diseases, Department of Pulmonary Medicine, University Hospitals Leuven, Leuven, Belgium
| | | | - Manuel Quaresma
- Boehringer Ingelheim International, Ingelheim am Rhein, Germany
| | | | | | - Martin Kolb
- McMaster University and St Joseph's Healthcare, Hamilton, Ontario, Canada
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Kakuwa T, Ariga A, Takasaki J, Kato M, Igari T, Shida Y, Okafuji T, Nakamura S, Miyazaki Y, Katano H, Iikura M, Izumi S, Sugiyama H. Mucor pulmonary embolism in a patient with myelodysplastic syndrome. Respir Med Case Rep 2020; 30:101035. [PMID: 32190545 PMCID: PMC7068122 DOI: 10.1016/j.rmcr.2020.101035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 03/02/2020] [Accepted: 03/02/2020] [Indexed: 11/28/2022] Open
Abstract
Mucormycosis is a life-threatening infectious disease that occurs most commonly in immunocompromised patients such as those with hematological malignancies. Its clinical symptoms and associated radiological findings vary and specific biomarkers and culture characteristics have not been defined. An 85-year-old man who had been treated for myelodysplastic syndrome and tuberculosis for several months presented with subacute fever and worsening left-side chest pain. Contrast-enhanced computed tomography images depicted massive tumor-like consolidation without enhancement, expanding from the left lower lobe. Emboli that did not respond to anticoagulants were detected in the left descending pulmonary artery. Despite intensive treatment he developed multiple organ failure and died 47 days after hospitalization. Gross pathology of a lung autopsy specimen revealed left lower pulmonary arterial emboli and pulmonary infarction, which was concluded to be the direct cause of death. The emboli were histopathologically identified as invasive mycelia in vessels. Mucor sp. was detected via real-time polymerase chain reaction and immunohistopathological analyses revealed that the mold in the blood vessels of lung tissue was partially positive for the mucor antigen. In the present case of Mucor sp. pulmonary emboli in a patient with myelodysplastic syndrome, radiographic findings were hard to distinguish from those typical of a lung abscess.
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Affiliation(s)
- T Kakuwa
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - A Ariga
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.,Department of Orthopedics, Tokyo Medical and Dental University, Tokyo, Japan
| | - J Takasaki
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - M Kato
- Department of Pathology, National Center for Global Health and Medicine, Tokyo, Japan
| | - T Igari
- Department of Pathology, National Center for Global Health and Medicine, Tokyo, Japan
| | - Y Shida
- Department of Radiology, National Center for Global Health and Medicine, Tokyo, Japan
| | - T Okafuji
- Department of Radiology, National Center for Global Health and Medicine, Tokyo, Japan
| | - S Nakamura
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan.,Department of Microbiology, Tokyo Medical University, Tokyo, Japan
| | - Y Miyazaki
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan
| | - H Katano
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, Japan
| | - M Iikura
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - S Izumi
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - H Sugiyama
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
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Mori D, Ishida H, Mizuno T, Kusumoto S, Kondo Y, Izumi S, Nakata G, Nozaki Y, Maeda K, Sasaki Y, Fujita KI, Kusuhara H. Alteration in the Plasma Concentrations of Endogenous Organic Anion-Transporting Polypeptide 1B Biomarkers in Patients with Non-Small Cell Lung Cancer Treated with Paclitaxel. Drug Metab Dispos 2020; 48:387-394. [PMID: 32114508 DOI: 10.1124/dmd.119.089474] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 01/28/2020] [Indexed: 12/18/2022] Open
Abstract
Paclitaxel has been considered to cause OATP1B-mediated drug-drug interactions at therapeutic doses; however, its clinical relevance has not been demonstrated. This study aimed to elucidate in vivo inhibition potency of paclitaxel against OATP1B1 and OATP1B3 using endogenous OATP1B biomarkers. Paclitaxel is an inhibitor of OATP1B1 and OATP1B3, with Ki of 0.579 ± 0.107 and 5.29 ± 3.87 μM, respectively. Preincubation potentiated its inhibitory effect on both OATP1B1 and OATP1B3, with Ki of 0.154 ± 0.031 and 0.624 ± 0.183 μM, respectively. Ten patients with non-small cell lung cancer who received 200 mg/m2 of paclitaxel by a 3-hour infusion were recruited. Plasma concentrations of 10 endogenous OATP1B biomarkers-namely, coproporphyrin I, coproporphyrin III, glycochenodeoxycholate-3-sulfate, glycochenodeoxycholate-3-glucuronide, glycodeoxycholate-3-sulfate, glycodeoxycholate-3-glucuronide, lithocholate-3-sulfate, glycolithocholate-3-sulfate, taurolithocholate-3-sulfate, and chenodeoxycholate-24-glucuronide-were determined in the patients with non-small cell lung cancer on the day before paclitaxel administration and after the end of paclitaxel infusion for 7 hours. Paclitaxel increased the area under the plasma concentration-time curve (AUC) of the endogenous biomarkers 2- to 4-fold, although a few patients did not show any increment in the AUC ratios of lithocholate-3-sulfate, glycolithocholate-3-sulfate, and taurolithocholate-3-sulfate. Therapeutic doses of paclitaxel for the treatment of non-small cell lung cancer (200 mg/m2) will cause significant OATP1B1 inhibition during and at the end of the infusion. This is the first demonstration that endogenous OATP1B biomarkers could serve as surrogate biomarkers in patients. SIGNIFICANCE STATEMENT: Endogenous biomarkers can address practical and ethical issues in elucidating transporter-mediated drug-drug interaction (DDI) risks of anticancer drugs clinically. We could elucidate a significant increment of the plasma concentrations of endogenous OATP1B biomarkers after a 3-hour infusion (200 mg/m2) of paclitaxel, a time-dependent inhibitor of OATP1B, in patients with non-small cell lung cancer. The endogenous OATP1B biomarkers are useful to assess the possibility of OATP1B-mediated DDIs in patients and help in appropriately designing a dosing schedule to avoid the DDIs.
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Affiliation(s)
- Daiki Mori
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Hiroo Ishida
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Tadahaya Mizuno
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Sojiro Kusumoto
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Yusuke Kondo
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Saki Izumi
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Genki Nakata
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Yoshitane Nozaki
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Kazuya Maeda
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Yasutsuna Sasaki
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Ken-Ichi Fujita
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
| | - Hiroyuki Kusuhara
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, the University of Tokyo, Tokyo, Japan (D.M., T.M., Y.K., G.N., K.M., H.K.); Division of Medical Oncology, Department of Medicine (H.I., Y.S.), and Division of Respiratory Medicine and Allergology, Department of Medicine (S.K.), Showa University School of Medicine, Tokyo, Japan; Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories, Eisai Co., Ltd., Ibaraki, Japan (S.I., Y.N.); and Division of Cancer Genome and Pharmacotherapy, Department of Clinical Pharmacy, Showa University School of Pharmacy, Tokyo, Japan (K.-i.F.)
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Izumi S, Nozaki Y, Kusuhara H, Hotta K, Mochizuki T, Komori T, Maeda K, Sugiyama Y. Relative Activity Factor (RAF)-Based Scaling of Uptake Clearance Mediated by Organic Anion Transporting Polypeptide (OATP) 1B1 and OATP1B3 in Human Hepatocytes. Mol Pharm 2020; 17:722-723. [PMID: 31961160 DOI: 10.1021/acs.molpharmaceut.0c00025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saki Izumi
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , 5-1-3 Tokodai , Tsukuba-shi , Ibaraki 300-2635 , Japan
| | - Yoshitane Nozaki
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , 5-1-3 Tokodai , Tsukuba-shi , Ibaraki 300-2635 , Japan
| | - Hiroyuki Kusuhara
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences , University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-003 , Japan
| | - Koichiro Hotta
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , 5-1-3 Tokodai , Tsukuba-shi , Ibaraki 300-2635 , Japan
| | - Toshiki Mochizuki
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , 5-1-3 Tokodai , Tsukuba-shi , Ibaraki 300-2635 , Japan
| | - Takafumi Komori
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , 5-1-3 Tokodai , Tsukuba-shi , Ibaraki 300-2635 , Japan
| | - Kazuya Maeda
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences , University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-003 , Japan
| | - Yuichi Sugiyama
- Sugiyama Laboratory, RIKEN Innovation Center , Research Cluster for Innovation, RIKEN , 1-6 Suehiro-cho, Tsurumi-ku , Yokohama-shi , Kanagawa 230-0045 , Japan
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Nozaki Y, Izumi S. Recent advances in preclinical in vitro approaches towards quantitative prediction of hepatic clearance and drug-drug interactions involving organic anion transporting polypeptide (OATP) 1B transporters. Drug Metab Pharmacokinet 2020; 35:56-70. [DOI: 10.1016/j.dmpk.2019.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 09/29/2019] [Accepted: 11/02/2019] [Indexed: 12/26/2022]
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10
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Ito R, Umehara K, Suzuki S, Kitamura K, Nunoya KI, Yamaura Y, Imawaka H, Izumi S, Wakayama N, Komori T, Anzai N, Akita H, Furihata T. A Human Immortalized Cell-Based Blood-Brain Barrier Triculture Model: Development and Characterization as a Promising Tool for Drug-Brain Permeability Studies. Mol Pharm 2019; 16:4461-4471. [PMID: 31573814 DOI: 10.1021/acs.molpharmaceut.9b00519] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Brain microvascular endothelial cells (BMEC), together with astrocytes and pericytes, form the blood-brain barrier (BBB) that strictly restricts drug penetration into the brain. Therefore, in central nervous system drug development, the establishment of an in vitro human BBB model for use in studies estimating the in vivo human BBB permeability of drug candidates has long been awaited. The current study developed and characterized a human immortalized cell-based BBB triculture model, termed the "hiBBB" model. To set up the hiBBB model, human immortalized BMEC (HBMEC/ci18) were cocultured with human immortalized astrocytes (HASTR/ci35) and brain pericytes (HBPC/ci37) in a transwell system. The trans-endothelial electrical resistance of the hiBBB model was 134.4 ± 5.5 (Ω × cm2), and the efflux ratios of rhodamine123 and dantrolene were 1.72 ± 0.11 and 1.72 ± 0.45, respectively, suggesting that the hiBBB model possesses essential cellular junction and efflux transporter functions. In BBB permeability assays, the mean value of the permeability coefficients (Pe) of BBB permeable compounds (propranolol, pyrilamine, memantine, and diphenhydramine) was 960 × 10-6 cm/s, which was clearly distinguishable from that of BBB nonpermeable compounds (sodium fluorescein and Lucifer yellow, 18 × 10-6 cm/s). Collectively, this study successfully developed the hiBBB model, which exhibits essential BBB functionality. Taking into consideration the high availability of the immortalized cells used in the hiBBB model, our results are expected to become an initial step toward the establishment of a useful human BBB model to investigate drug penetration into the human brain.
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Affiliation(s)
- Ryo Ito
- Pharmacokinetic Research Laboratories , Ono Pharmaceutical Co., Ltd. , Osaka 618-8585 , Japan
| | - Kenta Umehara
- Laboratory of DDS Design and Drug Disposition, Graduate School of Pharmaceutical Sciences , Chiba University , Chiba 260-8670 , Japan
| | - Shota Suzuki
- Laboratory of DDS Design and Drug Disposition, Graduate School of Pharmaceutical Sciences , Chiba University , Chiba 260-8670 , Japan
| | - Keita Kitamura
- Laboratory of DDS Design and Drug Disposition, Graduate School of Pharmaceutical Sciences , Chiba University , Chiba 260-8670 , Japan
| | - Ken-Ichi Nunoya
- Pharmacokinetic Research Laboratories , Ono Pharmaceutical Co., Ltd. , Osaka 618-8585 , Japan
| | - Yoshiyuki Yamaura
- Pharmacokinetic Research Laboratories , Ono Pharmaceutical Co., Ltd. , Osaka 618-8585 , Japan
| | - Haruo Imawaka
- Pharmacokinetic Research Laboratories , Ono Pharmaceutical Co., Ltd. , Osaka 618-8585 , Japan
| | - Saki Izumi
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , Ibaraki 300-2635 , Japan
| | - Naomi Wakayama
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , Ibaraki 300-2635 , Japan
| | - Takafumi Komori
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research Laboratories , Eisai Co., Ltd. , Ibaraki 300-2635 , Japan
| | - Naohiko Anzai
- Department of Pharmacology, Graduate School of Medicine , Chiba University , Chiba 260-8670 , Japan
| | - Hidetaka Akita
- Laboratory of DDS Design and Drug Disposition, Graduate School of Pharmaceutical Sciences , Chiba University , Chiba 260-8670 , Japan
| | - Tomomi Furihata
- Department of Clinical Pharmacy & Experimental Therapeutics, School of Pharmacy , Tokyo University of Pharmacy and Life Sciences , Tokyo 192-0392 , Japan
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Brown S, Distefano E, Izumi S, Wade M, Lockhart J, Jaboin J. Caring Wisely: A Model for Improving Advanced Care Planning for Cancer Patients. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.1970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Izumi S, Nozaki Y, Kusuhara H, Hotta K, Mochizuki T, Komori T, Maeda K, Sugiyama Y. Relative Activity Factor (RAF)-Based Scaling of Uptake Clearance Mediated by Organic Anion Transporting Polypeptide (OATP) 1B1 and OATP1B3 in Human Hepatocytes. Mol Pharm 2018; 15:2277-2288. [DOI: 10.1021/acs.molpharmaceut.8b00138] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Saki Izumi
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research
Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Yoshitane Nozaki
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research
Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Hiroyuki Kusuhara
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical
Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-003, Japan
| | - Koichiro Hotta
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research
Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Toshiki Mochizuki
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research
Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Takafumi Komori
- Drug Metabolism and Pharmacokinetics Tsukuba, Tsukuba Research
Laboratories, Eisai Co., Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Kazuya Maeda
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical
Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-003, Japan
| | - Yuichi Sugiyama
- Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, 1-6 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa 230-0045, Japan
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Kinoshita M, Takechi K, Nagao Y, Izumi S, Arai Y, Shirono R, Iwamoto S, Takao S, Noda S, Ueno J, Harada M. Abstract No. 694 The impact of virtual liver parenchymal perfusion using existing 3-dimensional workstation and simulation software in conventional transcatheter arterial chemoembolization for hepatocellular carcinoma. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Takamori A, Yoshinaga Y, Ukai T, Nakamura H, Takamori Y, Izumi S, Shiraishi C, Hara Y. Topical application of glycyrrhetinic acid in the gingival sulcus inhibits attachment loss in lipopolysaccharide-induced experimental periodontitis in rats. J Periodontal Res 2018; 53:422-429. [PMID: 29446076 DOI: 10.1111/jre.12529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2017] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND OBJECTIVE Attachment loss of the junctional epithelium and alveolar bone destruction are signs of periodontitis, which is mainly caused by an inflammatory response to dental plaque. Glycyrrhetinic acid (GA), a component of the licorice herb, has been shown to have important anti-inflammatory activities; however, there are no previous reports on the ability of its inhibitory effects to prevent periodontal diseases. Hence, in this study, using our experimental periodontitis model, we attempted to evaluate whether GA had an effect on the prevention of attachment loss and alveolar bone loss. MATERIAL AND METHODS Rats were intraperitoneally immunized with Escherichia coli lipopolysaccharide (LPS). The LPS group (n = 5) received 3 topical applications of 50 μg/μL of LPS followed by one application of the vehicle (propylene glycol:ethyl alcohol:phosphate-buffered saline [PBS] = 8:1:1) into the gingival sulcus. This protocol was repeated twice per day for 10 days. The low (n = 5) and high (n = 5) groups received topical application of LPS and 0.03% or 0.3% GA, respectively. The control group received topical application of PBS and vehicle. The rats were killed on the 10th day. Attachment loss, alveolar bone level and inflammatory cell infiltration were investigated histometrically. The formation of immune complexes and infiltration of LPS were evaluated immunohistologically. RESULTS Attachment loss, formation of immune complexes and infiltration of inflammatory cells were increased in the LPS group compared with the control group, and were completely inhibited in the low and high groups compared with the LPS group. The LPS group showed greater alveolar bone destruction compared with the control group and GA-treated groups. In addition, invasion of LPS was detected in the LPS group, was absent in the control group and was weaker in the GA-treated groups than in the LPS group. CONCLUSION In the present study, we showed that GA inhibits periodontal destruction in the rat experimental periodontitis model.
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Affiliation(s)
- A Takamori
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Y Yoshinaga
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - T Ukai
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - H Nakamura
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Y Takamori
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - S Izumi
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - C Shiraishi
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Y Hara
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Nikaido M, Izumi S, Ohnuki H, Takigawa Y, Yamasu K, Hatta K. Early development of the enteric nervous system visualized by using a new transgenic zebrafish line harboring a regulatory region for choline acetyltransferase a (chata) gene. Gene Expr Patterns 2018; 28:12-21. [PMID: 29413438 DOI: 10.1016/j.gep.2018.01.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/22/2018] [Accepted: 01/24/2018] [Indexed: 12/12/2022]
Abstract
The enteric nervous system (ENS) is the largest part of the peripheral nervous system in vertebrates. Toward the visualization of the development of the vertebrate ENS, we report our creation of a new transgenic line, Tg(chata:GGFF2) which has a 1.5-kb upstream region of the zebrafish choline acetyltransferase a (chata) gene followed by modified green fluorescent protein (gfp). During development, GFP + cells were detected in the gut by 60 h post-fertilization (hpf). In the gut of 6- and 12-days post-fertilization (dpf) larvae, an average of 92% of the GFP + cells were positive for the neuronal marker HuC/D, suggesting that GFP marks enteric neurons in this transgenic line. We also observed that 66% of the GFP + cells were choline acetyltransferase (ChAT)-immunopositive at 1.5 months. Thus, GFP is expressed at the larval stages at which ChAT protein expression is not yet detected by immunostaining. We studied the spatiotemporal pattern of neural differentiation in the ENS by live-imaging of this transgenic line. We observed that GFP + or gfp + cells initially formed a pair of bilateral rows at 60 hpf or 53 hpf, respectively, in the migrating enteric neural crest cells. Most of the GFP + cells did not migrate, and most of the new GFP + cells were added to fill the space among the previously formed GFP + cells. GFP expression reached the anus by 72 hpf. New GFP + cells then also appeared in the dorsal and ventral sides of the initial GFP + rows, resulting in their distribution on the entire gut by 4 dpf. A small number of new GFP + cells were found to move among older GFP + cells just before the cells stopped migration, suggesting that the moving GFP + cells may represent neural precursor cells searching for a place for the final differentiation. Our data suggest that the Tg(chata:GGFF2) line could serve as a useful tool for studies of enteric neural differentiation and cell behavior.
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Affiliation(s)
- Masataka Nikaido
- University of Hyogo, Koto 3-2-1, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Saki Izumi
- University of Hyogo, Koto 3-2-1, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Honoka Ohnuki
- Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Yuki Takigawa
- University of Hyogo, Koto 3-2-1, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
| | - Kyo Yamasu
- Saitama University, Shimo-Okubo 255, Saitama City, Saitama 338-8570, Japan
| | - Kohei Hatta
- University of Hyogo, Koto 3-2-1, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan.
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Toma M, Izumi S, Tawa K. Rapid and sensitive detection of neuron specific enolase with a polydopamine coated plasmonic chip utilizing a rear-side coupling method. Analyst 2018; 143:858-864. [DOI: 10.1039/c7an01577a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A rapid and sensitive detection of a cancer marker, neuron specific enolase (NSE), is demonstrated by using a disposable silver plasmonic chip functionalized with a mussel-inspired polydopamine (PDA) coating.
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Affiliation(s)
- M. Toma
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - S. Izumi
- Department of Chemistry
- Graduate School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - K. Tawa
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
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17
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Ishii Y, Hashimoto Y, Kono S, Izumi S, Iizuka J, Karasawa K. High Dose Rate Brachytherapy With Hypofractionated External Beam Radiation Therapy for High-Risk Prostate Cancer. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Shoji T, Yamasaki T, Izumi S, Murakami H, Mifuji K, Sawa M, Yasunaga Y, Adachi N, Ochi M. Factors affecting the potential for posterior bony impingement after total hip arthroplasty. Bone Joint J 2017; 99-B:1140-1146. [DOI: 10.1302/0301-620x.99b9.bjj-2016-1078.r2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 05/09/2017] [Indexed: 11/05/2022]
Abstract
Aims Our aim was to evaluate the radiographic characteristics of patients undergoing total hip arthroplasty (THA) for the potential of posterior bony impingement using CT simulations. Patients and Methods Virtual CT data from 112 patients who underwent THA were analysed. There were 40 men and 72 women. Their mean age was 59.1 years (41 to 76). Associations between radiographic characteristics and posterior bony impingement and the range of external rotation of the hip were evaluated. In addition, we investigated the effects of pelvic tilt and the neck/shaft angle and femoral offset on posterior bony impingement. Results The range of external rotation and the ischiofemoral length were significantly lower, while femoral anteversion, the ischial ratio, and ischial angle were significantly higher in patients with posterior bony impingement compared with those who had implant impingement (p < 0.05). The range of external rotation positively correlated with ischiofemoral length (r = 0.49, p < 0.05), and negatively correlated with ischial length (r = -0.49, p < 0.05), ischial ratio (r =- 0.49, p < 0.05) and ischial angle (r = -0.55, p < 0.05). The range of external rotation was lower in patients with posterior pelvic tilt (p < 0.05) and in those with a high offset femoral component (p < 0.05) due to posterior bony impingement. Conclusion Posterior bony impingement after THA is more likely in patients with a wider ischium and a narrow ischiofemoral space. A high femoral offset and posterior pelvic tilt are also risk factors for this type of impingement. Cite this article: Bone Joint J 2017;99-B:1140–6.
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Affiliation(s)
- T. Shoji
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - T. Yamasaki
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - S. Izumi
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - H. Murakami
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - K. Mifuji
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - M. Sawa
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - Y. Yasunaga
- Hiroshima Prefectural Rehabilitation Center, 295-3
Taguchi, Saijo-town, Higashi-hiroshima, 739-0036, Japan
| | - N. Adachi
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
| | - M. Ochi
- Graduate School of Biomedical Sciences,
Hiroshima University,
1-2-3 Kasumi, Minami-ku, Hiroshima
734-8551, Japan
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Izumi S, Basin B, McCalmont J, Presley M, Baggs J. REGISTERED NURSES PROVIDING PRIMARY PALLIATIVE CARE DURING TRANSITION FROM HOSPITAL TO HOME. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Izumi
- Oregon Health and Science University, Portland, Oregon
| | - B. Basin
- Oregon Health and Science University, Portland, Oregon
| | - J. McCalmont
- Oregon Health and Science University, Portland, Oregon
| | - M. Presley
- Oregon Health and Science University, Portland, Oregon
| | - J.G. Baggs
- Oregon Health and Science University, Portland, Oregon
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Nozaki M, Kagami Y, Shibata T, Nakamura K, Ito Y, Nishimura Y, Kawaguchi Y, Saito Y, Nagata Y, Matsumoto Y, Akimoto T, Nishimura T, Uno T, Tsujino K, Kataoka M, Kodaira T, Shiraishi K, Inoue K, Isohashi F, Hiraoka M, Karasawa K, Izumi S, Sakurai H. EP-1156: A clinical trial on hypofractionated whole breast irradiation after breast-conserving surgery. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31592-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Chino H, Iikura M, Saito N, Sato N, Suzuki M, Ishii S, Morino E, Naka G, Takasaki J, Izumi S, Hojo M, Takeda Y, Sugiyama H. Subinterlobular Pleural Location Is a Risk Factor for Pneumothorax After Bronchoscopy. Respir Care 2016; 61:1664-1670. [DOI: 10.4187/respcare.04874] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kono S, Ishii Y, Matsubara H, Izumi S, Hashimoto Y, Karasawa K. Is Involved-Field Irradiation Sufficient for Superficial Esophageal Carcinoma? Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tsuchiya Y, Shida N, Izumi S, Ogasawara M, Kakinuma W, Tsujiuchi T, Machida K. Factors associated with mothers not vaccinating their children against mumps in Japan. Public Health 2016; 137:95-105. [PMID: 27062068 DOI: 10.1016/j.puhe.2016.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/05/2015] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVES In Japan, mumps immunization is not mandatory, and the prevalence of mumps immunization among eligible children is only about 30%, raising concerns about increased risk of meningitis, encephalitis and deafness caused by mumps. In 2011, to understand why families are not voluntarily immunizing their children against mumps, we surveyed mothers who were university graduates to examine the factors and barriers influencing mumps vaccination in Japan. STUDY DESIGN A cross sectional design. METHODS We sent questionnaires including questions on demographic data and vaccination status, barriers and factors for immunizations to university alumnae to recruit participants. Data were analysed by Student's t-test for continuous variables and by univariate and multivariate analysis to obtain the odds ratio and adjusted odds ratio. RESULTS Two hundred and twenty-six mothers with children responded with an average (range) age of 44.7 years (SD = 5.02; 30-55 years). Adjusted odds ratios (aOR) from logistic regression analysis identified fear of harmful side-effects (aOR, 2.55; 95% CI, 1.10 to 5.89), the vaccination not being mandatory (aOR, 3.30; 95% CI, 1.41 to 7.72), perceived non-efficacy (aOR, 6.21; 95% CI, 1.85 to 20.91) and being busy (aOR, 3.30; 95% CI, 1.21 to 9.01) were significantly and inversely associated with mumps vaccination. Recommendations from family doctors (aOR, 0.35; 95% CI, 0.17 to 0.71), living abroad when their children would be vaccinated (aOR, 0.10; 95% CI, 0.02 to 0.68) and the maternal age (aOR, 0.91; 95% CI, 0.85 to 0.96) were significant and positively associated with vaccination. CONCLUSIONS In the absence of mandatory vaccinations, a public education campaign about mumps, their potential consequences and the nature and value of vaccination could improve the prevalence of mumps vaccination among children and prevent the consequences of this disease.
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Affiliation(s)
- Y Tsuchiya
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan.
| | - N Shida
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - S Izumi
- Faculty of Home Economics, Koriyama Women's University, 3-25-2, Kaisei, Koriyama, Fukushima, Japan
| | - M Ogasawara
- Department of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - W Kakinuma
- Advanced Research Center for Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - T Tsujiuchi
- Faculty of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
| | - K Machida
- Faculty of Human Science, Waseda University, 2-579-15, Mikajima, Tokorozawa, Saitama, Japan
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Hashimoto Y, Akimoto T, Ishii Y, Kono S, Izumi S, Maebayashi K, Iizuka J, Tanabe K, Kiyozuka M, Mitsuhashi N, Karasawa K. EP-1646: HDR brachytherapy with hypofractionated EBRT for high risk prostate cancerSPAN STYLE="font-style:italic">. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32897-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Izumi S, Nozaki Y, Komori T, Takenaka O, Maeda K, Kusuhara H, Sugiyama Y. Investigation of Fluorescein Derivatives as Substrates of Organic Anion Transporting Polypeptide (OATP) 1B1 To Develop Sensitive Fluorescence-Based OATP1B1 Inhibition Assays. Mol Pharm 2016; 13:438-48. [DOI: 10.1021/acs.molpharmaceut.5b00664] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Saki Izumi
- Drug Metabolism
and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co.
Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Yoshitane Nozaki
- Drug Metabolism
and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co.
Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Takafumi Komori
- Drug Metabolism
and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co.
Ltd., 5-1-3 Tokodai, Tsukuba-shi, Ibaraki 300-2635, Japan
| | - Osamu Takenaka
- Modeling & Simulation, Clinical Pharmacology, Eisai Co., Ltd., 4-6-10 Koishikawa, Bunkyo-ku, Tokyo 112-8088, Japan
| | - Kazuya Maeda
- Laboratory
of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroyuki Kusuhara
- Laboratory
of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuichi Sugiyama
- Sugiyama
Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, 1-6 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa 230-0045, Japan
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Ishijima T, Muraki T, Sekiguchi Y, Ishikawa H, Morise S, Goto H, Izumi S. The characteristics of trunk posture and activities of scapular muscles in patients with partial-thickness rotator cuff tear. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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27
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Ishikawa H, Muraki T, Sekiguchi Y, Ishijima T, Morise S, Yamamoto N, Itoi E, Izumi S. Differences in scapular upward rotation and activities of downward rotators during arm elevation between symptomatic and asymptomatic rotator cuff tears. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Izumi S, Nozaki Y, Maeda K, Komori T, Takenaka O, Kusuhara H, Sugiyama Y. Investigation of the impact of substrate selection on in vitro organic anion transporting polypeptide 1B1 inhibition profiles for the prediction of drug-drug interactions. Drug Metab Dispos 2014; 43:235-47. [PMID: 25414411 DOI: 10.1124/dmd.114.059105] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The risk assessment of organic anion transporting polypeptide (OATP) 1B1-mediated drug-drug interactions (DDIs) is an indispensable part of drug development. We previously reported that in vitro inhibitory potencies of several inhibitors on OATP1B1 depend on the substrates when prototypical substrates, estradiol-17β-glucuronide (E₂G), estrone-3-sulfate, and sulfobromophthalein were used as test substrates. The purpose of this study was to comprehensively investigate this substrate-dependent inhibition of OATP1B1 using clinically relevant OATP1B1 inhibitors and substrate drugs. Effects of cyclosporine A (CsA), rifampin, and gemfibrozil on OATP1B1-mediated uptake of 12 substrate drugs were examined in OATP1B1-expressing human embryonic kidney 293 cells. The Ki values (μM) for CsA varied from 0.0771 to 0.486 (6.3-fold), for rifampin from 0.358 to 1.23 (3.4-fold), and for gemfibrozil from 9.65 to 252 (26-fold). Except for the inhibition of torasemide uptake by CsA and that of nateglinide uptake by gemfibrozil, the Ki values were within 2.8-fold of those obtained using E₂G as a substrate. Preincubation potentiated the inhibitory effect of CsA on OATP1B1 with similar magnitude regardless of the substrates. R values calculated based on a static model showed some variation depending on the Ki values determined with various substrates, and such variability could have an impact on the DDI predictions particularly for a weak-to-moderate inhibitor (gemfibrozil). OATP1B1 substrate drugs except for torasemide and nateglinide, or E₂G as a surrogate, is recommended as an in vitro probe in the inhibition experiments, which will help mitigate the risk of false-negative DDI predictions potentially caused by substrate-dependent Ki variation.
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Affiliation(s)
- Saki Izumi
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
| | - Yoshitane Nozaki
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
| | - Kazuya Maeda
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
| | - Takafumi Komori
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
| | - Osamu Takenaka
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
| | - Hiroyuki Kusuhara
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
| | - Yuichi Sugiyama
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co. Ltd., Ibaraki, Japan (S.I., Y.N., T.K.); Pharmacokinetics and Pharmacodynamics, Morphotek Inc., Exton, Pennsylvania (O.T.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Kanagawa, Japan (Y.S.)
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Hashimoto Y, Akimoto T, Motegi A, Yuka I, Sawa K, Nakamura K, Izumi S, Maebayashi K, Iizuka J, Tanabe K, Kiyozuka M, Mitsuhashi N. Hypofractionated Image-Guided IMRT for Clinically Localized Prostate Cancer: A Total Dose of 66Gy Delivered to 3 Gy per Fraction Three Times per Week. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Izumi S, Nozaki Y, Komori T, Maeda K, Takenaka O, Kusano K, Yoshimura T, Kusuhara H, Sugiyama Y. Substrate-dependent inhibition of organic anion transporting polypeptide 1B1: comparative analysis with prototypical probe substrates estradiol-17β-glucuronide, estrone-3-sulfate, and sulfobromophthalein. Drug Metab Dispos 2013; 41:1859-66. [PMID: 23920221 DOI: 10.1124/dmd.113.052290] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Organic anion transporting polypeptide (OATP) 1B1 plays an important role in the hepatic uptake of many drugs, and the evaluation of OATP1B1-mediated drug-drug interactions (DDIs) is emphasized in the latest DDI (draft) guidance documents from U.S. and E.U. regulatory agencies. It has been suggested that some OATP1B1 inhibitors show a discrepancy in their inhibitory potential, depending on the substrates used in the cell-based assay. In this study, inhibitory effects of 14 compounds on the OATP1B1-mediated uptake of the prototypical substrates [³H]estradiol-17β-glucuronide (E₂G), [³H]estrone-3-sulfate (E₁S), and [³H]sulfobromophthalein (BSP) were studied in OATP1B1-transfected cells. Inhibitory potencies of tested compounds varied depending on the substrates. Ritonavir, gemfibrozil, and erythromycin caused remarkable substrate-dependent inhibition with up to 117-, 14-, and 13-fold difference in their IC₅₀ values, respectively. Also, the clinically relevant OATP inhibitors rifampin and cyclosporin A exhibited up to 12- and 6-fold variation in their IC₅₀ values, respectively. Regardless of the inhibitors tested, the most potent OATP1B1 inhibition was observed when [³H]E₂G was used as a substrate. Mutual inhibition studies of OATP1B1 indicated that E₂G and E₁S competitively inhibited each other, whereas BSP noncompetitively inhibited E₂G uptake. In addition, BSP inhibited E₁S in a competitive manner, but E₁S caused an atypical kinetics on BSP uptake. This study showed substrate-dependent inhibition of OATP1B1 and demonstrated that E₂G was the most sensitive in vitro OATP1B1 probe substrate among three substrates tested. This will give us an insight into the assessment of clinically relevant OATP1B1-mediated DDI in vitro with minimum potential of false-negative prediction.
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Affiliation(s)
- Saki Izumi
- Drug Metabolism and Pharmacokinetics Japan, Tsukuba Research Laboratories, Eisai Co., Ltd., Tokodai, Tsukuba-shi, Ibaraki, Japan (S.I., Y.N., T.K., O.T., K.K., T.Y.); Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan (K.M., H.K.); and Sugiyama Laboratory, RIKEN Innovation Center, Research Cluster for Innovation, RIKEN, Yokohama-shi, Kanagawa, Japan (Y.S.)
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Hirano S, Takeda Y, Naka G, Iikura M, Udagawa H, Izumi S, Sugiyama H, Kobayashi N. Docetaxel Monotherapy Compared with Carboplatin and Paclitaxel Doublet Chemotherapy in Elderly Patients with Non-Small-Cell Lung Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32450-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Hashimoto Y, Maebayashi K, Izumi S, Motegi A, Mitsuhashi N. Dropped Head Syndrome Induced by Chemoradiotherapy for Nasopharyngeal Carcinoma: A Case Report. Jpn J Clin Oncol 2012; 42:1091-3. [DOI: 10.1093/jjco/hys135] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Terai T, Urano Y, Izumi S, Kojima H, Nagano T. A practical strategy to create near-infrared luminescent probes: conversion from fluorescein-based sensors. Chem Commun (Camb) 2012; 48:2840-2. [PMID: 22222313 DOI: 10.1039/c2cc16553h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Luminescent lanthanide complexes incorporating Yb(3+) and Nd(3+) are attracting much attention as imaging agents, but there have been few practical methods to make responsive sensors with these complexes. Here, we introduce a general strategy to synthesize near-infrared luminescent probes by conjugating a Yb(3+) chelate to established fluorescein-based probes. As the first demonstration, we present a complex, based on the green-emitting probe DAF-4, that responds to nitric oxide (NO) in aqueous solution with a significant increase in luminescence intensity at 980 nm.
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Affiliation(s)
- Takuya Terai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Manabe T, Higera-Iglesias AL, Takasaki J, Izumi S, Vazquez-Manriquez ME, Kudo K. Socioeconomic impact relating to clinical condition on Pandemic (H1N1) Influenza. BMC Proc 2011. [DOI: 10.1186/1753-6561-5-s1-p106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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35
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Kawamata H, Izumi S, Doi Y, Imai Y. Oral squamous cell carcinomas originating from minor salivary glands showed aggressive biological behavior and poor prognosis when compared to those from squamous epithelium. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Manabe T, Higera-Iglesias AL, Takasaki J, Izumi S, Vazquez-Manriquez ME, Kudo K. Socioeconomic impact relating to clinical condition on Pandemic (H1N1) Influenza. BMC Proc 2011. [PMCID: PMC3019421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- T Manabe
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
| | - AL Higera-Iglesias
- Research Center for Clinical Epidemiology, National Institute of Respiratory Diseases, Mexico D.F., Mexico
| | - J Takasaki
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
| | - S Izumi
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
| | - ME Vazquez-Manriquez
- Department of Pathology, National Institute of Respiratory Diseases, Mexico D.F., Mexico
| | - K Kudo
- Disease Control and Prevention Center, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, 162-8655 Japan
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Cai LY, Izumi S, Suzuki T, Goya K, Nakamura E, Sugiyama T, Kobayashi H. Dioxins in ascites and serum of women with endometriosis: a pilot study. Hum Reprod 2010; 26:117-26. [PMID: 21106495 DOI: 10.1093/humrep/deq312] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Animal studies and laboratory experiments have demonstrated that exposure to dioxins may be involved in the pathophysiology of endometriosis. However, recent epidemiological investigations have shown conflicting results. Although peritoneal fluid is a specific microenvironment playing a pivotal role in the development of endometriosis, to our knowledge, there is no published study evaluating the concentrations of dioxins in serum and peritoneal fluid simultaneously. The present study explores the possible correlation between the local peritoneal fluid levels of dioxins and concurrent endometriosis. METHODS There were 17 infertile women enrolled in the present study. After the diagnostic laparoscopic examination, the women were divided into two groups: endometriosis (n = 10) and controls (n = 7). We measured 29 dioxins simultaneously in serum and peritoneal fluid samples: 7 polychlorinated dibenzo-p-dioxins (PCDDs), 10 polychlorinated dibenzofurans (PCDFs), and 12 polychlorinated biphenyls (dioxin-like PCBs). A dioxin toxic equivalency (TEQ) system was utilized to calculate the dioxin concentration in each sample. RESULTS Serum concentrations of itemized components of 29 dioxins were similar in the endometriosis patients compared with the controls. Higher concentrations of PCDFs and dioxin-like PCBs were observed in peritoneal fluid than in serum, whereas the reverse was shown for PCDDs. Statistical analysis showed that higher levels of dioxin TEQ (PCDDs and PCDFs) in peritoneal fluid were significantly associated with an increased risk of endometriosis (OR: 2.5; 95% CI: 1.17-5.34; P = 0.035). CONCLUSIONS This is the first report suggesting that higher concentrations of dioxins (PCDDs and PCDFs) in peritoneal fluid are linked to endometriosis. More detail and epidemiological research is warranted to further explore this link.
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Affiliation(s)
- L Y Cai
- Department of Obstetrics and Gynecology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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Motegi A, Akimoto T, Kiyozuka M, Izumi S, Hashimoto Y, Nakamura K, Maebayashi K, Iizuka J, Tanabe K, Mitsuhashi N. Correlation between the Changes in the Epic QOL Score and the Severity of Acute Genitourinary Toxicity after Permanent Brachytherapy with I-125 Alone for Prostate Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oouchida Y, Mori T, Suzuki E, Izumi S. P11-1 Inhibitory 1Hz TMS to supplementary motor area reduced action tremor. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60678-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Matsuzaka Y, Kikuti YY, Izumi S, Suzuki T, Cai LY, Goya K, Inoko H, Makino T, Kulski JK, Kimura M. Mapping of susceptibility locus for endometriosis within the HLA region using microsatellite markers in Japanese women. ACTA ACUST UNITED AC 2010; 75:65-7. [PMID: 20196820 DOI: 10.1111/j.1399-0039.2009.01391.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Endometriosis is a female disorder characterized by the presence of uterine endometrial tissue in ectopic loci. Previous studies reported a higher prevalence of particular human leukocyte antigen (HLA) in endometriosis. In order to confirm the association between endometriosis and the HLA region, 15 polymorphic microsatellite markers distributed in the HLA class II to class III region were subjected to association analysis by polymerase chain reaction (PCR)-based DNA typing of 89 patients and 136 healthy controls. Statistical analysis of the allelic frequency at each microsatellite locus showed that there were no statistically significant differences in the allele frequency distributions between the cases and controls. This finding suggests that the etiology of endometriosis does not involve the HLA class II genomic region and a portion of class III genomic region in the Japanese population.
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Affiliation(s)
- Y Matsuzaka
- Department of Molecular Life Science, Tokai University School of Medicine, Bohseidai, Isehara, Kanagawa, Japan
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Izumi S, Urano Y, Hanaoka K, Terai T, Nagano T. A simple and effective strategy to increase the sensitivity of fluorescence probes in living cells. J Am Chem Soc 2009; 131:10189-200. [PMID: 19572714 DOI: 10.1021/ja902511p] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Noninvasive visualization and investigation of interactions among proteins, biomolecules, and enzymes in living cells is an important goal for biologists, and fluorescence probes are powerful tools for this purpose. Because many target molecules are present in only trace amounts, high sensitivity is very important, and it is common to improve the sensitivity of fluorescence probes by focusing on high reaction velocity, K(d). (Gee, K. R.; Archer, E. A.; Lapham, L. A.; Leonard, M. E.; Zhou, Z.; Bingham, J.; Diwu, Z. Bioorg. Med. Chem. Lett. 2000, 10, 1515-1518.) So far, we have designed and synthesized various highly sensitive fluorescence probes based on the above concepts. (Gabe, Y.; Urano, Y.; Kikuchi, K.; Kojima, H.; Nagano, T. J. Am. Chem. Soc. 2004, 126, 3357-3367. Komatsu, K.; Urano, Y.; Kojima, H.; Nagano, T. J. Am. Chem. Soc. 2007, 129, 13447-13454.) Nevertheless, they were sometimes insufficiently sensitive to detect biomolecules in living cells, despite high chemical sensitivity in cuvette. In this report, we suggest a new approach to increase the sensitivity of fluorescence probes, focusing on their intracellular retention. Since calcein is well-retained, we investigated its structural, chemical, and optical characteristics and found that the iminodiacetic acid group (IAG) is a key structure for the intracellular retention. We next designed and synthesized novel fluorescence probes containing IAGs. They showed superior intracellular retention, making it possible to visualize low concentrations of target molecules that would be difficult to observe with conventional probes and permitting long-term observation in living cells. Improvement of intracellular retention of fluorescence probes holds great promise as a strategy for developing a wide range of highly sensitive probes for studies on various biological phenomena.
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Affiliation(s)
- Saki Izumi
- CREST, Japan Science and Technology Agency, 4-8-1 Honcho, Kawaguchi, Saitama, 332-0012, Japan
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Akutsu K, Takatori S, Nakazawa H, Hayakawa K, Izumi S, Makino T. Dietary intake estimations of polybrominated diphenyl ethers (PBDEs) based on a total diet study in Osaka, Japan. Food Additives and Contaminants: Part B 2008; 1:58-68. [DOI: 10.1080/19393210802236901] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Matsunaga C, Izumi S, Furukubo T, Satoh M, Yamakawa T, Uchida T, Kadowaki D, Hirata S. Effect of famotidine and lansoprazole on serum phosphorus levels in hemodialysis patients on calcium carbonate therapy. Clin Nephrol 2008; 68:93-8. [PMID: 17722708 DOI: 10.5414/cnp68093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIMS Histamine H2 receptor antagonists (HRA) or proton pump inhibitors (PPI) are frequently administered to patients on hemodialysis, because their intestinal mucosa is fragile. Although three studies have indicated that concomitant HRA administration causes a decrease in the binding of phosphate by calcium carbonate, the HRA doses tested in these studies were 2-4 times higher than the recommended dose for hemodialysis patients. In addition, it remains unclear whether PPI therapy affects serum phosphate levels in hemodialysis patients taking calcium carbonate. Accordingly, the aim of this study was to evaluate the influence of lansoprazole and the recommended dose of famotidine on serum phosphate and calcium levels in hemodialysis patients. METHODS The study included 115 hemodialysis patients who were taking calcium carbonate and who were also treated with either famotidine (10 mg/day) or lansoprazole (30 mg/day). Changes of the mean serum phosphate and calcium levels over 2 months before and after the start of famotidine or lansoprazole therapy were compared. The same parameters were also compared when famotidine was switched to lansoprazole. RESULTS The mean serum phosphate level increased significantly after administration of either famotidine or lansoprazole (by 6.6 +/- 21.9% or 13.0 +/- 26.3%, p = 0.032 and p = 0.029, respectively). The mean serum calcium level was unchanged after administration of famotidine, but showed a significant decrease after administration of lansoprazole (by 3.44 +/- 7.73%, p = 0.013). Therefore, the calcium x phosphorus product was significantly increased by administration of famotidine, but not by administration of lansoprazole (6.68 +/- 23.37% and 8.73 +/- 27.41%, p = 0.046 and p = 0.251, respectively). When famotidine was switched to lansoprazole, the serum phosophate level did not change, but serum calcium decreased significantly by 3.8 +/- 13.0% (p = 0.0006). CONCLUSION Not only administration of 20 mg/ day of famotidine as previously reported, but also 10 mg/day of this drug (the recommended dose for hemodialysis patients) caused a significant increase of serum phosphate in patients taking calcium carbonate. PPIs have been reported to show no effect on the serum phosphate level, but 30 mg/day of lansoprazole also caused a significant increase of serum phosphate in patients taking calcium carbonate.
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Affiliation(s)
- C Matsunaga
- Department of Pharmacy Services, Shirasagi Hospital, Osaka, Japan
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Izumi S, Yamamoto M, Suzuki K, Shimizu A, Aranishi F. Identification and detection of Pseudomonas plecoglossicida isolates with PCR primers targeting the gyrB region. J Fish Dis 2007; 30:391-7. [PMID: 17584436 DOI: 10.1111/j.1365-2761.2007.00820.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Pseudomonas plecoglossicida is the agent of bacterial haemorrhagic ascites (BHA) in freshwater fish farming in Japan. To develop a rapid identification and detection method for P. plecoglossicida, a PCR amplification technique targeting the chromosomal DNA region coding the B subunit of the DNA gyrase (gyrB) was used. The nucleotide sequences of gyrB were determined in nine isolates of P. plecoglossicida and two other Pseudomonas species. On the basis of these determined sequences and the gyrB sequences of other Pseudomonas species or fish pathogenic bacteria deposited in international nucleotide sequence databases (GenBank/EMBL/DDBJ), PCR primers PL-G1F, PL-G1R, PL-G2F and PL-G2R were designed for specific amplification of the partial gyrB of P. plecoglossicida. The specificity of these primers in amplifying the gyrB of P. plecoglossicida was verified using selected strains of related bacterial species. The nested PCR technique was used to detect P. plecoglossicida from kidney and intestine of ayu. Primer pair PL-G1F and PL-G1R was used for the external PCR, and primer pair PL-G2F and PL-G2R for the internal PCR. Of 10 ayu juveniles, expected size PCR products were observed from intestine and kidney samples in one and two specimens, respectively. The PCR technique with primers based on the gyrB sequence is thus useful for the diagnosis of BHA.
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Affiliation(s)
- S Izumi
- Stock Assessment Division, National Institute of Fisheries Science, Yokohama, Japan.
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Arai H, Morita Y, Izumi S, Katagiri T, Kimura H. Molecular typing by pulsed-field gel electrophoresis of Flavobacterium psychrophilum isolates derived from Japanese fish. J Fish Dis 2007; 30:345-55. [PMID: 17498178 DOI: 10.1111/j.1365-2761.2007.00809.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Sixty-four isolates of Flavobacterium psychrophilum from ayu, Plecoglossus altivelis altivelis (Temminck & Schlegel), and other fish (n=16) in Japan and the type strain (NCIMB 1947(T)) were typed using pulsed-field gel electrophoresis (PFGE) with endonuclease BlnI and XhoI. These isolates were classified into 20 clusters and 42 genotypes by PFGE analysis. The most predominant cluster of isolates from ayu was cluster XII (n=20), followed by clusters XVII, XVI, XX, XI, IX, X, XIII and XV; the remaining 17 isolates from other fish were divided into clusters I, II, III, IV, V, VI, VII, VIII, XIV, XVIII and XIX. The PFGE genotype of isolates from ayu clearly differed from those of other fish. The isolates from ayu in Gunma Prefecture belonged to clusters XII, XVI, XVII and XX, and the strains of three of these clusters (XII, XVII and XX) were isolated from ayu in 15 of 19 prefectures. PFGE typing enabled more accurate classification of isolates into clusters than previously achieved by analysing the restriction fragment length polymorphism of PCR products. These results suggest that F. psychrophilum isolated from ayu and other fish are genetically different and strains with several PFGE types have spread within Japan.
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Affiliation(s)
- H Arai
- Gunma Prefectural Fisheries Experiment Station, Maebashi, Gunma, Japan
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Izumi S, Ouchi S, Kuge T, Arai H, Mito T, Fujii H, Aranishi F, Shimizu A. PCR-RFLP genotypes associated with quinolone resistance in isolates of Flavobacterium psychrophilum. J Fish Dis 2007; 30:141-7. [PMID: 17352789 DOI: 10.1111/j.1365-2761.2007.00797.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
A novel genotyping method for epizootiological studies of bacterial cold-water disease caused by Flavobacterium psychrophilum and associated with quinolone resistance was developed. Polymerase chain reaction followed by restriction fragment length polymorphism (PCR-RFLP) was performed on 244 F. psychrophilum isolates from various fish species. PCR was performed with primer pair GYRA-FP1F and GYRA-FP1R amplifying the A subunit of the DNA gyrase (GyrA) gene, which contained the quinolone resistance determining region. Digestion of PCR products with the restriction enzyme Mph1103I showed two genotypes, QR and QS. The difference between these genotypes was amino acid substitutions at position 83 of GyrA (Escherichia coli numbering). The genotype QR indicated an alanine residue at this position associated with quinolone resistance in F. psychrophilum isolates. Of the 244 isolates tested in this study, the number of QR genotype isolates was 153 (62.7%). In isolates from ayu (n=177), 146 (82.5%) were genotype QR. With combination of this technique and previously reported PCR-RFLP genotyping, eight genotypes were observed in F. psychrophilum isolates. Using this genotyping system, the relationships between genotype and host fish species, or locality of isolation, were analysed and are discussed.
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Affiliation(s)
- S Izumi
- Stock Assessment Division, National Institute of Fisheries Science, Yokohama, Japan.
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Negoro S, Izumi S, Furukubo T, Satoh M, Matsunaga C, Yamakawa T, Ikegawa S, Nakanishi H, Kadowaki D, Hirata S. Interaction between activated VD3 and Ca channel blockers in patients undergoing hemodialysis. Int J Clin Pharmacol Ther 2007; 45:186-7. [PMID: 17416114 DOI: 10.5414/cpp45186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Matsubayashi H, Sugi T, Arai T, Shida M, Kondo A, Suzuki T, Izumi S, McIntyre JA. IgG-antiphospholipid antibodies in follicular fluid of IVF-ET patients are related to low fertilization rate of their oocytes. Am J Reprod Immunol 2007. [DOI: 10.1111/j.1600-0897.2007.00477.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Takeda Y, Tsuduki E, Izumi S, Hojo M, Kamimura M, Naka G, Kobayashi K, Kudo K. A phase I/II trial of irinotecan-cisplatin combined with an anti-late-diarrhoeal programme to evaluate the safety and antitumour response of this combination therapy in patients with advanced non-small-cell lung cancer. Br J Cancer 2006; 93:1341-9. [PMID: 16288302 PMCID: PMC2361534 DOI: 10.1038/sj.bjc.6602866] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We conducted a phase I/II study in patients with advanced non-small-cell lung cancer (NSCLC) to increase the therapeutic index of the cisplatin–irinotecan combination by institution of an anti-late-diarrhoeal program (ADP). A total of 77 chemotherapy-naive patients with advanced NSCLC were enrolled. The cisplatin dose was fixed at 60 mg m−2 (Day 1). Irinotecan was escalated in 5 mg m−2 increments, starting from 60 mg m−2 (Days 1 and 8). ADP consisted of oral sodium bicarbonate, magnesium oxide, basic water, and ursodeoxycholic acid, and was administered orally for 4 days with each dose of irinotecan. In the phase I portion, irinotecan pharmacokinetics was also examined. After the recommended dose of irinotecan with ADP was determined, a phase II study was conducted to evaluate the response. Maximum tolerated dose was reached at an irinotecan dose of 80 mg m−2 (Grade 4 diarrhoea and neutropenia). Pharmacokinetic studies show that the maximum concentration and the area under the curve of both irinotecan and SN38 (active metabolite of irinotecan) tend to increase in the dose-dependent manner of irinotecan. The phase II portion of the study included 48 patients, who were treated with 75 mg m−2 of irinotecan. Grade 3/4 toxicities included neutropenia in 65%, leucopenia in 33%, and late diarrhoea in 6% of the patients. During this treatment, PS did not change in 65% of patients. At the end of the chemotherapy, PS did not decline in 90% of patients. In the phase II portion, a response occurred in 63% (95% confidential interval (CI), 47–76%) of patients. Median time to progression was 19 weeks (95% CI, 15–22 weeks), and median survival was 52 weeks (95% CI, 39–64 weeks). This regimen of irinotecan and cisplatin with ADP resulted in promising efficacy with acceptable toxicity for patients with advanced NSCLC. This regimen is a candidate for the experimental arm towards future phase III studies.
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Affiliation(s)
- Y Takeda
- Department of Respiratory Medicine, International Medical Center of Japan, Tokyo 162-8655, Japan.
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Izumi S, Fujii H, Aranishi F. Detection and identification of Flavobacterium psychrophilum from gill washings and benthic diatoms by PCR-based sequencing analysis. J Fish Dis 2005; 28:559-64. [PMID: 16266329 DOI: 10.1111/j.1365-2761.2005.00663.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A nested polymerase chain reaction (PCR) amplification technique was used to detect Flavobacterium psychrophilum from washings of fish gill surfaces and benthic diatoms as environmental samples. Gill washing samples were prepared from kawamutsu, Zacco temminckii (Temminck & Schlegel) and oikawa, Z. platypus (Temminck & Schlegel). Benthic diatom samples were collected from stone surfaces. All samples were collected from rivers in Wakayama Prefecture, Japan from November 2003 to January 2004. Following simple DNA extraction using a chelating resin, nested PCR techniques targeting 16S-rDNA and gyrB regions were performed, and PCR products were cloned and sequenced. With nested PCR amplification for the 16S-rDNA gene, ambiguous PCR products were detected from two of six samples, and by cloning and sequencing analysis were found not to be DNA fragments amplified from F. psychrophilum. Using nested PCR for the gyrB gene, however, five of six samples were clearly positive for F. psychrophilum in agarose gel electrophoresis, and were found to be identical with nucleotide sequences of F. psychrophilumgyrB deposited in DNA databases by sequencing analysis. Results indicate that nested PCR for the gyrB region is a useful technique to detect low levels of F. psychrophilum from environmental samples contaminated with many other organisms.
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Affiliation(s)
- S Izumi
- Molecular Biology Division, National Institute of Fisheries Science, Yokohama, Japan.
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