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Tanaka A, Kiriyama A, Sano A, Changung C, Katsumi H, Yamamoto A, Furubayashi T. Left-Right Difference in Brain Pharmacokinetics Following Nasal Administration Via One-Site Nostrils. J Pharm Sci 2024; 113:2633-2640. [PMID: 38734208 DOI: 10.1016/j.xphs.2024.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 05/03/2024] [Accepted: 05/04/2024] [Indexed: 05/13/2024]
Abstract
The olfactory and trigeminal pathways are direct delivery pathways between the nose and brain. To determine the effect of direct delivery on drug distribution in the brain, two model drugs with different physical properties, antipyrine (ANP), with high membrane permeability, and ranitidine (RNT), with low membrane permeability, were selected. For ANP, direct delivery from the nose to the brain was observed only in the olfactory bulb beside the nasal cavity, with a direct transport percentage (DTP) of approximately 45 %, whereas in the frontal and occipital brains, the contribution from the systemic circulation to the brain was observed as the primary route of brain distribution. No significant variations were observed in the pharmacokinetics of ANP in the left and right brain, whereas RNT was distributed in all brain regions with a DTP of > 95 %. The closer the brain region is to the nasal cavity, the higher the DTP. Furthermore, the left brain, the same nostril site (left nostril) of administration, had a larger level of drug delivery than the right brain. These findings imply that the influence of the administered nostril site differs based on the physicochemical properties and amount of the drug.
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Affiliation(s)
- Akiko Tanaka
- Laboratory of Pharmaceutical Technology, Kobe Pharmaceutical University, Motoyamakita-machi 4-19-1, Higashinada, Kobe 658-8558, Japan.
| | - Akiko Kiriyama
- Department of Pharmacokinetics, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kodo, Kyotanabe, Kyoto 610-0395, Japan
| | - Ayaka Sano
- Laboratory of Pharmaceutical Technology, Kobe Pharmaceutical University, Motoyamakita-machi 4-19-1, Higashinada, Kobe 658-8558, Japan
| | - Cho Changung
- Laboratory of Pharmaceutical Technology, Kobe Pharmaceutical University, Motoyamakita-machi 4-19-1, Higashinada, Kobe 658-8558, Japan
| | - Hidemasa Katsumi
- Department of Biopharmaceutics, Kyoto Pharmaceutical University, Yamashina, Kyoto 607-8414, Japan
| | - Akira Yamamoto
- Department of Biopharmaceutics, Kyoto Pharmaceutical University, Yamashina, Kyoto 607-8414, Japan
| | - Tomoyuki Furubayashi
- Laboratory of Pharmaceutical Technology, Kobe Pharmaceutical University, Motoyamakita-machi 4-19-1, Higashinada, Kobe 658-8558, Japan
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2
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Mudrova B, Hrabakova K, Kozlik P, Hobzova R, Sirc J, Bosakova Z. A sensitive bioanalytical ultra-high-performance liquid chromatography-tandem mass spectrometry method for the simultaneous quantitation of lactone and carboxylate forms of topotecan in plasma and vitreous. J Sep Sci 2024; 47:e2400181. [PMID: 38863110 DOI: 10.1002/jssc.202400181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/09/2024] [Accepted: 05/17/2024] [Indexed: 06/13/2024]
Abstract
Topotecan (TPT) is used in the treatment of retinoblastoma, the most common malignant intraocular tumor in children. TPT undergoes pH-dependent hydrolysis of the lactone ring to the ring-opened carboxylate form, with the lactone form showing antitumor activity. A selective, and highly sensitive ultra-high-performance liquid chromatography-tandem mass spectrometry method was developed for the determination of both forms of TPT in one mobile phase composition in plasma and vitreous humor matrices. The method showed an excellent linear range of 0.375-120 ng/mL for the lactone. For the carboxylate, the linear range was from 0.75 to 120 ng/mL. The matrix effect and the recovery for the lactone ranged from 98.5% to 106.0% in both matrices, for the carboxylate form, it ranged from 94.9% to 101.2%. The dynamics of the transition between TPT lactone and TPT carboxylate were evaluated at different pH environments. The stability of TPT forms was assessed in plasma and vitreous humor at 8 and 37°C and a very fast conversion of lactone to carboxylate form occurred at 37°C in both matrices. The method developed facilitates the investigation of TPT pharmacodynamics and the release kinetics in the development of the innovative local drug delivery systems.
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Affiliation(s)
- Barbora Mudrova
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Katerina Hrabakova
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Petr Kozlik
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Radka Hobzova
- Institute of Macromolecular Chemistry, Prague, Czech Republic
| | - Jakub Sirc
- Institute of Macromolecular Chemistry, Prague, Czech Republic
| | - Zuzana Bosakova
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
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Hassanien A, Altalhi TA, Atta A, AlHazaa AN, Alsawat M, Mersal GA, Adam AMA, Refat MS. Studying spectroscopic, cyclic voltammetry, and electrical properties of novel 4-amino antipyrine derivative for photonic applications. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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4
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Le QD, Duong VA, Lee SH, Nguyen TTL, Maeng HJ. Bioanalytical method validation, biopharmaceutical and pharmacokinetic evaluation of GSK-650394, a serum- and glucocorticoid-regulated kinase 1 inhibitor. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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5
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Jain D, Thakur PS, Thakore SD, Samal SK, Bansal AK. Impact of differential particle size of fenofibrate nanosuspensions on biopharmaceutical performance using physiologically based absorption modeling in rats. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.102040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Nibila T, Ahamed TS, Soufeena P, Muraleedharan K, Periyat P, Aravindakshan K. Synthesis, structural characterization, Hirshfeld surface and DFT based reactivity, UV filter and NLO studies of Schiff base analogue of 4-aminoantipyrine. RESULTS IN CHEMISTRY 2020. [DOI: 10.1016/j.rechem.2020.100062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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7
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Dunkoksung W, Vardhanabhuti N, Jianmongkol S. Potential P-glycoprotein-mediated herb-drug interaction of phyllanthin at the intestinal absorptive barrier. J Pharm Pharmacol 2018; 71:213-219. [DOI: 10.1111/jphp.13019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 09/02/2018] [Indexed: 01/14/2023]
Abstract
Abstract
Objectives
This study investigated the absorptive potential of phyllanthin across the polarized Caco-2 monolayers and the potential role of phyllanthin in P-glycoprotein (P-gp)-mediated drug interaction.
Methods
The absorptive potential of phyllanthin was predicted from its apparent permeability (Papp) across the Caco-2 monolayers under the pH gradient condition (pH 6.5AP–7.4BL) at 37°C. Integrity of paracellular transport was assessed by monitoring transepithelial electrical resistance (TEER) and lucifer yellow (LY) leakage. P-gp-mediated interaction was evaluated by transport studies of phyllanthin and rhodamine-123.
Key findings
The absorptive Papp of phyllanthin (34.90 ± 1.18 × 10−6 cm/s) was in the same rank order as the high permeable theophylline and antipyrine. Phyllanthin transport in the absorptive and secretive directions was comparable (the efflux ratio (ER) of 1.19 ± 0.01). Phyllanthin caused no changes in TEER nor LY leakage in the monolayers. However, phyllanthin increased rhodamine-123 ER in a concentration-dependent manner, suggesting its inhibition on P-gp function. In addition, phyllanthin aqueous solubility was <5 μg/ml at 37°C.
Conclusions
Phyllanthin is a highly permeable compound that could passively diffuse through the absorptive barrier via transcellular pathway with little hindrance from P-gp. Phyllanthin could interfere with transport of P-gp drug substrates, when concomitantly administered. In addition, aqueous solubility could be a limiting factor in phyllanthin absorption.
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Affiliation(s)
- Wilasinee Dunkoksung
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Nontima Vardhanabhuti
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Suree Jianmongkol
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
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Said MI, Rageh AH, Abdel-Aal FAM. Fabrication of novel electrochemical sensors based on modification with different polymorphs of MnO 2 nanoparticles. Application to furosemide analysis in pharmaceutical and urine samples. RSC Adv 2018; 8:18698-18713. [PMID: 35541151 PMCID: PMC9080553 DOI: 10.1039/c8ra02978d] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 05/03/2018] [Indexed: 11/21/2022] Open
Abstract
A novel MnO2 nanoparticles/chitosan-modified pencil graphite electrode (MnO2 NPs/CS/PGE) was constructed using two different MnO2 polymorphs (γ-MnO2 and ε-MnO2 nanoparticles). X-ray single phases of these two polymorphs were obtained by the comproportionation reaction between MnCl2 and KMnO4 (molar ratio of 5 : 1). The temperature of this reaction is the key factor governing the formation of the two polymorphs. Their structures were confirmed by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) and energy dispersive X-ray (EDX) analysis. Scanning electron microscopy (SEM) was employed to investigate the morphological shape of MnO2 NPs and the surface of the bare and modified electrodes. Moreover, cyclic voltammetry and electrochemical impedance spectroscopy (EIS) were used for surface analysis of the modified electrodes. Compared to bare PGE, MnO2 NPs/CS/PGE shows higher effective surface area and excellent electrocatalytic activity towards the oxidation of the standard K3[Fe(CN)6]. The influence of different suspending solvents on the electrocatalytic activity of MnO2 was studied in detail. It was found that tetrahydrofuran (THF) is the optimum suspending solvent regarding the peak current signal and electrode kinetics. The results reveal that the modified γ-MnO2/CS/PGE is the most sensitive one compared to the other modified electrodes under investigation. The modified γ-MnO2/CS/PGE was applied for selective and sensitive determination of FUR. Under the optimized experimental conditions, γ-MnO2/CS/PGE provides a linear response over the concentration range of 0.05 to 4.20 μmol L-1 FUR with a low limit of detection, which was found to be 4.44 nmol L-1 (1.47 ng mL-1) for the 1st peak and 3.88 nmol L-1 (1.28 ng mL-1) for the 2nd one. The fabricated sensor exhibits a good reproducibility and selectivity and was applied successfully for the determination of FUR in its dosage forms and in spiked urine samples with good accuracy and precision.
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Affiliation(s)
- Mohamed I Said
- Department of Chemistry, Faculty of Science, Assiut University Assiut 71516 Egypt
| | - Azza H Rageh
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University Assiut 71526 Egypt +20 882 080774 +20 882 411009
| | - Fatma A M Abdel-Aal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University Assiut 71526 Egypt +20 882 080774 +20 882 411009
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9
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Rezazadeh A, Amjadi M, L Manzoori J, Ghaffari A, Jouyban A. Microextraction of Furosemide from Human Serum and Its Fluorimetric Determination. PHARMACEUTICAL SCIENCES 2018. [DOI: 10.15171/ps.2018.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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10
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Pocock K, Delon L, Bala V, Rao S, Priest C, Prestidge C, Thierry B. Intestine-on-a-Chip Microfluidic Model for Efficient in Vitro Screening of Oral Chemotherapeutic Uptake. ACS Biomater Sci Eng 2017; 3:951-959. [PMID: 33429567 DOI: 10.1021/acsbiomaterials.7b00023] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Many highly effective chemotherapeutic agents can only be administered intravenously as their oral delivery is compromised by low gastro-intestinal solubility and permeability. SN-38 (7-ethyl-10-hydroxycamptothecin) is one such drug; however, recently synthesized lipophilic prodrugs offer a potential solution to the low oral bioavailability issue. Here we introduce a microfluidic-based intestine-on-a-chip (IOAC) model, which has the potential to provide new insight into the structure-permeability relationship for lipophilic prodrugs. More specifically, the IOAC model utilizes external mechanical cues that induce specific differentiation of an epithelial cell monolayer to provide a barrier function that exhibits an undulating morphology with microvilli expression on the cell surface; this is more biologically relevant than conventional Caco-2 Transwell models. IOAC permeability data for SN38 modified with fatty acid esters of different chain lengths and at different molecular positions correlate excellently with water-lipid partitioning data and have the potential to significantly advance their preclinical development. In addition to advancing mechanistic insight into the permeability of many challenging drug candidates, we envisage the IOAC model to also be applicable to nanoparticle and biological entities.
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Affiliation(s)
- Kyall Pocock
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, Adelaide, South Australia 5095, Australia
| | - Ludivine Delon
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, Adelaide, South Australia 5095, Australia
| | - Vaskor Bala
- School of Pharmacy and Medical Sciences, University of South Australia, City East Campus, Adelaide, South Australia 5000, Australia
| | - Shasha Rao
- School of Pharmacy and Medical Sciences, University of South Australia, City East Campus, Adelaide, South Australia 5000, Australia
| | - Craig Priest
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, Adelaide, South Australia 5095, Australia
| | - Clive Prestidge
- School of Pharmacy and Medical Sciences, University of South Australia, City East Campus, Adelaide, South Australia 5000, Australia.,ARC Centre of Excellence in Convergent Bio and Nano Science and Technology, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Benjamin Thierry
- Future Industries Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, Adelaide, South Australia 5095, Australia.,ARC Centre of Excellence in Convergent Bio and Nano Science and Technology, University of South Australia, Mawson Lakes, South Australia 5095, Australia
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11
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El-Ghamaz N, Ghoneim M, El-Sonbati A, Diab M, El-Bindary A, Abd El-Kader M. Synthesis and optical properties studies of antipyrine derivatives thin films. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2014.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Synthesis and biological activity studies of some new hybrid compounds derived from antipyrine. HETEROCYCL COMMUN 2016. [DOI: 10.1515/hc-2016-0002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract-Benzyl-
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13
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Mendes P, Oliver SG, Kell DB. Fitting Transporter Activities to Cellular Drug Concentrations and Fluxes: Why the Bumblebee Can Fly. Trends Pharmacol Sci 2015; 36:710-723. [PMID: 26538313 PMCID: PMC4642801 DOI: 10.1016/j.tips.2015.07.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 07/23/2015] [Accepted: 07/23/2015] [Indexed: 12/18/2022]
Abstract
A recent paper in this journal argued that reported expression levels, kcat and Km for drug transporters could be used to estimate the likelihood that drug fluxes through Caco-2 cells could be accounted for solely by protein transporters. It was in fact concluded that if five such transporters contributed ‘randomly’ they could account for the flux of the most permeable drug tested (verapamil) 35% of the time. However, the values of permeability cited for verapamil were unusually high; this and other drugs have much lower permeabilities. Even for the claimed permeabilities, we found that a single ‘random’ transporter could account for the flux 42% of the time, and that two transporters can achieve 10 · 10−6 cm·s−1 90% of the time. Parameter optimisation methods show that even a single transporter can account for Caco-2 drug uptake of the most permeable drug. Overall, the proposal that ‘phospholipid bilayer diffusion (of drugs) is negligible’ is not disproved by the calculations of ‘likely’ transporter-based fluxes. There has been recent debate as to the relative extents to which cellular transmembrane drug transports occur through any phospholipid bilayer region or is transporter-mediated only. Much recent evidence suggests (perhaps surprisingly) that phospholipid bilayer diffusion is negligible. A recent article in this journal suggested that the expression profile and kinetics of known transporters might not be adequate to explain the most active drug fluxes (of verapamil and propranolol) in Caco-2 cells via transporters only. We show with our own simulations that this is not in fact the case, especially when evolutionary selection is taken into account, and that the Haldane relation accounts straightforwardly for directional differences, even for equilibrative transporters. Typical protein transporters alone can easily account for measured drug fluxes in Caco-2 cells.
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Affiliation(s)
- Pedro Mendes
- School of Computer Science; Manchester Institute of Biotechnology, The University of Manchester, 131 Princess St, Manchester M1 7DN, UK; Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), The University of Manchester, 131, Princess St, Manchester M1 7DN, United Kingdom; Center for Quantitative Medicine, University of Connecticut, UConn Health, 263 Farmington Avenue, Farmington, CT 06030-6033, USA
| | - Stephen G Oliver
- Cambridge Systems Biology Centre; Dept of Biochemistry, University of Cambridge, Sanger Building, 80 Tennis Court Road, Cambridge CB2 1GA, UK
| | - Douglas B Kell
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess St, Manchester M1 7DN, UK; Centre for Synthetic Biology of Fine and Speciality Chemicals (SYNBIOCHEM), The University of Manchester, 131, Princess St, Manchester M1 7DN, United Kingdom; School of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom.
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Ahmad Panahi H, Moniri E, Ali Asgari M, Hajiaghababaei L. Selective Sorption and Determination of Atenolol in Pharmaceutical and Biological Samples by Molecular Imprinting Using New Copolymer Beads as a Functional Matrix. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2014.903847] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Homayon Ahmad Panahi
- a Department of Chemistry , Islamic Azad University, Central Tehran Branch , Iran
| | - Elham Moniri
- b Department of Chemistry , Islamic Azad University, Varamin (Pishva) Branch , Iran
| | - Mohsen Ali Asgari
- c Department of Chemistry , College of Science Yadegare-E-Imam Khomeini (RAH) Branch, Islamic Azad University, Shahre Rey Branch , Iran
| | - Leila Hajiaghababaei
- c Department of Chemistry , College of Science Yadegare-E-Imam Khomeini (RAH) Branch, Islamic Azad University, Shahre Rey Branch , Iran
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Zhang R, Song R, Sun Y, Hao Q. Synthesis, structure and photoresponsive properties of 4-(3-fluorobenzylideneamino)antipyrine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 113:43-51. [PMID: 23711396 DOI: 10.1016/j.saa.2013.04.099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/05/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
Organic compounds are attracting greater attention largely in the recent years owing to their potential applications in the functional materials. Herein we reported the structural and photophysical properties of 4-(3-fluorobenzylideneamino)antipyrine. The studied molecule adopts a trans configuration about the imine bond, and forms a non-planar molecular device consisted of two effectively conjugated π-electron moieties. The stronger vibrational and nonlinear optical activities are tightly related to the molecular structural characteristics revealed by the analysis on vibrational modes and frontier molecular orbitals. The intramolecular electrons can be separated by the electron-transporting with specified photon-absorbing theoretically. The total molecular dipole moment, mean linear polarizability and first-order hyperpolarizability calculated at B3LYP/6-31G(d) level are 1.5390 Debye, 35.6075 Å(3) and 1.5391×10(-29) cm(5)/esu, respectively. The reported results indicate that the compound is a promising candidate of photoresponsive materials.
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Affiliation(s)
- Ran Zhang
- Institute for Material Chemistry, Binzhou University, Binzhou 256600, PR China
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Luiz VHM, Pezza L, Pezza HR. Rapid determination of furosemide by combined spot test/diffuse reflectance spectroscopy to detect doping in sport. Microchem J 2013. [DOI: 10.1016/j.microc.2012.04.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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The interaction between human breast cancer resistance protein (BCRP) and five bisbenzylisoquinoline alkaloids. Int J Pharm 2013; 453:371-9. [PMID: 23742976 DOI: 10.1016/j.ijpharm.2013.05.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 05/14/2013] [Accepted: 05/26/2013] [Indexed: 02/08/2023]
Abstract
BCRP is one of the key factors to drug absorption, distribution and elimination. Bisbenzylisoquinoline alkaloids are a large family of natural phytochemicals with great potential for clinical use. In this study, the interaction between BCRP and five bisbenzylisoquinoline alkaloids (neferine, isoliensinine, liensinine, dauricine and tetrandrine) were evaluated using LLC-PK1/BCRP cell model. The intracellular accumulation and bi-directional transport studies were conducted, and then molecular docking analysis was carried out employing a homology model of BCRP. Our study revealed that the permeability of these five alkaloids was not high, the Papp values were all less than 6.5 × 10(-6)cm/s. Liensinine and dauricine were substrates of BCRP: at lower concentration (10 μM), the net efflux ratios were 2.87 and 1.64 respectively. And their cellular accumulation was lower in LLC-PK1/BCRP cells than in LLC-PK1 cells. On the other hand, tetrandrine, isoliensinine and neferine were not substrates of BCRP. On the basis of docking studies, a direct hydrogen bond was formed between liensinine and arginine 482 which is a hot spot of BCRP for substrate specificity; and dauricine had hydrophobic interaction with BCRP. In conclusion, our study indicated that BCRP could mediate the excretion of liensinine and dauricine, thus influence their pharmacological activity and disposition.
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Sun Y, Yu C, Liu Z, Huang C, Hao Q, Xu L. Synthesis, structure, photo-responsive properties of 4-(2-fluorobenzylideneamino)antipyrine: a combined experimental and theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:1013-1022. [PMID: 22925977 DOI: 10.1016/j.saa.2012.07.117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/05/2012] [Accepted: 07/11/2012] [Indexed: 06/01/2023]
Abstract
In this work, 4-(2-fluorobenzylideneamino)antipyrine (FBIAAP) was synthesized and characterized by elemental analysis, XRD, FT-IR, FT-Raman and UV-Vis techniques as well as density functional calculations. The studied molecule adopts a trans configuration about the imine CN bond, and adjacent molecules are linked through two kinds of weak hydrogen bonds to form supramolecular layered structures along the ab plane. Vibrational spectral analyses show that the benzene moiety directly attached to the central pyrazoline shows good vibrational isolation from the other moiety of pyrazole-imino-benzene presenting good vibrational resonances. UV-vis absorption bands mainly belong to n→π and π→π according to the electron transfer orbital assignments for the electron absorption spectrum of FBIAAP. The first-order hyperpolarizability of FBIAAP is 44.9 times that of urea theoretically. In addition, the thermodynamic properties were also obtained theoretically from the harmonic frequencies of the optimized structure.
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Affiliation(s)
- Yuxi Sun
- Center of New Energy & Materials, Mianyang Normal University, Mianyang 621000, PR China.
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Singh SP, Raju KSR, Nafis A, Jain GK. Simultaneous determination of nine model compounds in permeability samples using RP-HPLC: application to prove the cassette administration principle in single pass intestinal perfusion study in rats. J Pharm Biomed Anal 2012; 67-68:71-6. [PMID: 22613582 DOI: 10.1016/j.jpba.2012.03.048] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 03/22/2012] [Accepted: 03/23/2012] [Indexed: 11/18/2022]
Abstract
A simple, sensitive and specific reversed phase high performance liquid chromatographic (RP-HPLC) method for simultaneous determination of atenolol, paracetamol, hydrochlorothiazide, caffeine, cephalexin, metoprolol, propranolol, ketoprofen along with phenol red (a non-absorbable compound) in samples obtained from intestinal in situ single-pass perfusion studies, was developed and validated. Chromatography was carried out on RP18 column with mobile phase comprising of 10 mM phosphate buffer (pH 2.5) and methanol in gradient mode. The calibration curves were linear for all nine permeability model compounds (r² > 0.999) across the concentration range of 1.25-40 μg/ml. The coefficient of variation for intra and inter-day assay precision was between 0.04 and 3.08% and the accuracy was between 98.39 and 109.45%. Stability studies were carried out at different storage conditions and all the analytes were found to be stable. The method was successfully applied for analysing the permeability samples obtained from in situ single pass perfusion studies. The effective permeability (P(eff)) values obtained upon cassette administration were in close proximity to the permeability values obtained upon single administration of model compounds. In conclusion, the developed RP-HPLC method can be used for high throughput cassette validation of rat in situ perfusion model for intestinal permeability assessment.
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Tian Y, He Y, Hu H, Wang L, Zeng S. Determination of the enantioselectivity of six chiral aryloxy aminopropanol drugs transport across Caco-2 cell monolayers. Acta Pharm Sin B 2012. [DOI: 10.1016/j.apsb.2012.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Aly HM, Saleh NM, Elhady HA. Design and synthesis of some new thiophene, thienopyrimidine and thienothiadiazine derivatives of antipyrine as potential antimicrobial agents. Eur J Med Chem 2011; 46:4566-72. [PMID: 21840088 DOI: 10.1016/j.ejmech.2011.07.035] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2011] [Revised: 07/18/2011] [Accepted: 07/20/2011] [Indexed: 10/17/2022]
Abstract
4-acetamide Pyrazolone 2 was synthesized by acetylation of 4-amino antipyrine 1 in excellent yield. 4-acetamide pyrazolone 2 was exploited as a starting material for the syntheses of hitherto unknown different types of new heterocyclic compounds incorporating the antipyrine moiety which expect highly biological activity against various microorganisms. Thus, Claisen condensation of 4-acetamide pyrazolone 2 with diethyl oxalate have been utility to afford new 4-oxaloacetyl antipyrine 3, which upon hydrazinolysis of the ester function to obtain the acetohydrazide derivative 18 which used as starting material to synthesize 1,2,4-triazol 19 and hydrazone 20 derivatives. 4-aminothiophene carboxylate derivatives 6, 7 were synthesized by utility of Gewald reaction. On the other hand, Michael type addition of the enolate ion of acetyl functions in acetamide pyrazolone 2 to the activated double bond in arylidenemalonoester to furnish pyrane derivative 9 was done. Finally, 4-acetamide pyrazolone 2 was treated with aromatic substituted aldehyde to exhibit thiophenacrylamide derivative 10. Compound 6 gave characteristic reaction for enaminonitriles, thus, the behavior of o-aminoester of 4-aminothiophene carboxylate derivative 6 toward electrophilic reagent, one carbon donars, amide and acid was also investigated to afford the correspondence thiophene derivatives 11,12,13,15 and 16. In addition, treatment of carboxamide derivative 16 with thionyl chloride afforded the thienothiadiazine derivative 17. The characterization of all synthesized compounds was done by elemental analysis and spectral studies. Moreover, all the synthesized compounds were tested against antimicrobial activities by the disc diffusion method, which exhibited higher promising biological activities.
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Affiliation(s)
- Hala M Aly
- Department of Chemistry, Faculty of Science, Girl's, Al-Azhar University, PO box 11754, Yousef Abbas Str, Nasr City, Cairo, Egypt.
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Kratz J, Teixeira M, Koester L, Simões C. An HPLC-UV method for the measurement of permeability of marker drugs in the Caco-2 cell assay. Braz J Med Biol Res 2011; 44:531-7. [DOI: 10.1590/s0100-879x2011007500060] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 04/19/2011] [Indexed: 11/21/2022] Open
Affiliation(s)
- J.M. Kratz
- Universidade Federal de Santa Catarina, Brasil
| | | | - L.S. Koester
- Universidade Federal do Rio Grande do Sul, Brasil
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24
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Electrochemical detection of anticancer drug topotecan using nano-acetylene black film. Colloids Surf B Biointerfaces 2011; 84:135-9. [DOI: 10.1016/j.colsurfb.2010.12.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 12/21/2010] [Accepted: 12/21/2010] [Indexed: 11/19/2022]
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25
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Raman N, Selvan A. DNA interaction, enhanced DNA photocleavage, electrochemistry, thermal investigation and biopotencial properties of new mixed-ligand complexes of Cu(II)/VO(IV) based on Schiff bases. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2010.10.038] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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26
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Liang Q, Wang Q. 4-[(1-Hy-droxy-2-naphth-yl)methyl-ene-amino]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o1968-9. [PMID: 21588289 PMCID: PMC3007374 DOI: 10.1107/s1600536810026450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Accepted: 07/05/2010] [Indexed: 11/10/2022]
Abstract
The title anti-pyrine derivative, C(22)H(19)N(3)O(2), was synthesized by the reaction of 4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one and 1-hy-droxy-naphthalene-2-carbaldehyde in methanol solution. As expected, the compound adopts a trans configuration about the central C=N bond. The N atom is involved in an intra-molecular O-H⋯N bond which stabilizes the mol-ecular configuration. In the crystal structure, adjacent mol-ecules stack with no short contacts.
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Affiliation(s)
- Qiang Liang
- Department of Chemistry, Teachers College of Qingdao University, Qingdao, Shandong 266071, People’s Republic of China
| | - Qian Wang
- Department of Chemistry, Teachers College of Qingdao University, Qingdao, Shandong 266071, People’s Republic of China
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Electrochemical study of atenolol at a carbon paste electrode modified with mordenite type zeolite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2010.03.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhang R, Du B, Sun G, Sun Y. Experimental and theoretical studies on o-, m- and p-chlorobenzylideneaminoantipyrines. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:1115-1124. [PMID: 20093073 DOI: 10.1016/j.saa.2009.12.067] [Citation(s) in RCA: 183] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2009] [Revised: 12/18/2009] [Accepted: 12/24/2009] [Indexed: 05/28/2023]
Abstract
Three antipyrine derivatives of o-, m- and p-chlorobenzylideneaminoantipyrines were characterized by spectral techniques and density functional calculations. The optimized configurations are very close to the XRD values and are used as foundations to investigate the molecular properties. The spectral assignments were attempted to ascribe to the vibrational modes of the detailed substructures with the aid of theoretical calculations because of the satisfactory consistencies between the experimental and theoretical spectra for each of the studied compounds. Raman spectral ascriptions represent that the pi-conjugated moieties linked by Schiff base imines are responsible for the excellent Raman scattering activities of these compounds. The linear polarizabilities and first hyperpolarizabilities of the studied molecules indicate that the compounds are good candidates of nonlinear optical materials. The statistical thermodynamic functions and their correlations with temperatures obtained from the theoretical vibrations are similar to each other among the isomers.
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Affiliation(s)
- Ran Zhang
- Institute for Material Chemistry, Binzhou University, Binzhou, PR China
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Quantification of topotecan by liquid chromatography–mass spectrometry (LC–MS). Application to intestinal transport using rat everted gut sacs. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:645-52. [DOI: 10.1016/j.jchromb.2010.01.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 01/18/2010] [Indexed: 11/19/2022]
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Al-Mohizea AM. Influence of intestinal efflux pumps on the absorption and transport of furosemide. Saudi Pharm J 2010; 18:97-101. [PMID: 23960725 DOI: 10.1016/j.jsps.2010.02.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2009] [Accepted: 01/19/2010] [Indexed: 11/28/2022] Open
Abstract
PURPOSE Furosemide is a commonly used diuretic which is used in the treatment of edema, congestive heart failure, hypertension and renal failure. Its absorption exhibits inter- and intra-subject variability that can be attributed to many factors including the intestinal efflux pumps such as the P-glycoprotein (P-gp). This study was done due to the great disagreement between what is published in the literature regarding the influence of P-gp on furosemide and at the same time due to the importance of this drug in the treatment of different conditions as described above. In addition, an investigation of the effect of two of the commonly used pharmaceutical excipients (hydroxypropyl β-cyclodextrin [HPβCD] and Tween 80) and also a P-gp inhibitor (verapamil hydrochloride) on the intestinal absorption of this drug were also done. METHODS The study utilized the everted intestinal sacs technique to investigate both the effect of the efflux transporter (P-gp) on furosemide absorption and also the effect of the chosen excipients. RESULTS The absorption of furosemide was significantly influenced by the P-gp as confirmed by the everted vis the non-everted sacs together with the verapamil study in which the transport of furosemide was inhibited by verapamil. In addition, Tween 80 was also shown to inhibit the P-gp pump whereas the HPβCD did not significantly influence the efflux of furosemide in this study. CONCLUSIONS P-glycoprotein and some of the used excipients in the formulation play a very important role in the transport of furosemide and other drugs. Thus excipients that affect the activity of P-gp should be avoided when formulating drugs that are substrate for the P-gp or other efflux pumps.
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Affiliation(s)
- Abdullah M Al-Mohizea
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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Sun YX, Hao QL, Yu ZX, Jiang WJ, Lu LD, Wang X. Experimental and theoretical studies on vibrational spectra of 4-(2-furanylmethyleneamino)antipyrine, 4-benzylideneaminoantipyrine and 4-cinnamilideneaminoantipyrine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:892-901. [PMID: 19451018 DOI: 10.1016/j.saa.2009.04.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 03/25/2009] [Accepted: 04/15/2009] [Indexed: 05/27/2023]
Abstract
This work deals with the IR and Raman spectroscopy of 4-(2-furanylmethyleneamino) antipyrine (FAP), 4-benzylideneaminoantipyrine (BAP) and 4-cinnamilideneaminoantipyrine (CAP) by means of experimental and quantum chemical calculations. The equilibrium geometries, harmonic frequencies, infrared intensities and Raman scattering activities were calculated by density functional B3LYP method with the 6-31G(d) basis set. The comparisons between the calculated and experimental results covering molecular structures, assignments of fundamental vibrational modes and thermodynamic properties were investigated. The optimized molecular geometries have been compared with the experimental data obtained from XRD data, which indicates that the theoretical results agree well with the corresponding experimental values. For the three compounds, comparisons and assignments of the vibrational frequencies indicate that the calculated frequencies are close to the experimental data, and the IR spectra are comparable with some slight differences, whereas the Raman spectra are different clearly and the strongest Raman scattering actives are relative tightly to the molecular conjugative moieties linked through their Schiff base imines. The thermodynamic properties (heat capacities, entropies and enthalpy changes) and their correlations with temperatures were also obtained from the harmonic frequencies of the optimized structures.
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Affiliation(s)
- Yu-Xi Sun
- Key Laboratory of Minstry of Education for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Nanjing 210094, PR China.
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Sun YX, Wei WX, Hao QL, Lu LD, Wang X. Experimental and theoretical studies on 4-(2,4-dichlorobenzylideneamino)antipyrine and 4-(2,6-dichlorobenzylideneamino)antipyrine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:772-781. [PMID: 19406686 DOI: 10.1016/j.saa.2009.03.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Revised: 03/28/2009] [Accepted: 03/30/2009] [Indexed: 05/27/2023]
Abstract
Two antipyrine derivates, with the same formula C(18)H(15)Cl(2)N(3)O, are structurally similar Schiff bases derived from the condensation of 2,4-dichlorobenzaldehyde or 2,6-dichlorobenzaldehyde and 4-aminoantipyrine in methanol solutions. The compounds were characterized by elemental analysis, FT-IR, FT-Raman and UV-vis techniques. Density functional calculations were performed to further optimize and characterize them. The calculated results indicate that the theoretical values show good agreements with experimental ones. They are similar in their IR spectra and different in their Raman spectra. The detailed vibrational and UV-vis absorption spectra of the compounds have been ascribed to their corresponding molecular structures and electrons orbital transitions. The statistical thermodynamic functions and their correlations with temperatures of the title compounds have been obtained from their theoretical vibrations of the optimized structures. The nonlinear optical and UV-vis properties indicate that the compounds are the promising photoelectronic materials.
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Affiliation(s)
- Yu-Xi Sun
- Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Nanjing 210094, PR China.
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Sun YX, Hao QL, Wei WX, Yu ZX, Lu LD, Wang X, Wang YS. Experimental and density functional studies on 4-(3,4-dihydroxybenzylideneamino)antipyrine, and 4-(2,3,4-trihydroxybenzylideneamino)antipyrine. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.02.036] [Citation(s) in RCA: 219] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sun YX, Hao QL, Yu ZX, Wei WX, Lu LD, Wang X. Experimental and density functional studies on 4-(4-cyanobenzylideneamino)antipyrine. Mol Phys 2009. [DOI: 10.1080/00268970902769471] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yu-Xi Sun
- a Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials , Nanjing University of Science and Technology , Nanjing 210094, P.R. China
- b Key Laboratory of Life-Organic Analysis, College of Chemical Science , Qufu Normal University , Qufu 273165, P.R. China
| | - Qing-Li Hao
- a Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials , Nanjing University of Science and Technology , Nanjing 210094, P.R. China
| | - Zong-Xue Yu
- a Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials , Nanjing University of Science and Technology , Nanjing 210094, P.R. China
| | - Wen-Xian Wei
- a Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials , Nanjing University of Science and Technology , Nanjing 210094, P.R. China
| | - Lu-De Lu
- a Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials , Nanjing University of Science and Technology , Nanjing 210094, P.R. China
| | - Xin Wang
- a Key Laboratory of Education Ministry for Soft Chemistry and Functional Materials , Nanjing University of Science and Technology , Nanjing 210094, P.R. China
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Al-arfaj NA, Al-Abdulkareem EA, Aly FA. Determination of enalapril maleate and atenolol in their pharmaceutical products and in biological fluids by flow-injection chemiluminescence. LUMINESCENCE 2009; 24:422-8. [DOI: 10.1002/bio.1129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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36
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Recent developments in analytical determination of furosemide. J Pharm Biomed Anal 2008; 48:519-32. [DOI: 10.1016/j.jpba.2008.07.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 07/01/2008] [Accepted: 07/02/2008] [Indexed: 11/23/2022]
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37
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Engdal S, Nilsen OG. Inhibition of P-glycoprotein in Caco-2 cells: effects of herbal remedies frequently used by cancer patients. Xenobiotica 2008; 38:559-73. [PMID: 18570158 DOI: 10.1080/00498250801986969] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
1. The herbal products Natto K2, Agaricus, mistletoe, noni juice, green tea and garlic were investigated for in vitro inhibitory potential on P-glycoprotein (P-gp)-mediated transport of digoxin (30 nM) in differentiated and polarized Caco-2 cells. 2. Satisfactory cell functionality was demonstrated through measurements of assay linearity, transepithelial electric resistance (TEER), cytotoxicity, mannitol permeability, and inclusion of the positive inhibition control verapamil. 3. The most potent inhibitors of the net digoxin flux (IC(50)) were mistletoe > Natto K2 > Agaricus > green tea (0.022, 0.62, 3.81, >4.5 mg ml(-1), respectively). Mistletoe also showed the lowest IC(25) value, close to that obtained by verapamil (1.0 and 0.5 microg ml(-1), respectively). The IC(50)/IC(25) ratio was found to be a good parameter for the determination of inhibition profiles. Garlic and noni juice were classified as non-inhibitors. 4. This study shows that mistletoe, Natto K2, Agaricus and green tea inhibit P-gp in vitro. Special attention should be paid to mistletoe due to very low IC(50) and IC(25) values and to Natto K2 due to a low IC(50) value and a low IC(50)/IC(25) ratio.
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Affiliation(s)
- S Engdal
- Faculty of Medicine, Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
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Bansal T, Awasthi A, Jaggi M, Khar RK, Talegaonkar S. Pre-clinical evidence for altered absorption and biliary excretion of irinotecan (CPT-11) in combination with quercetin: Possible contribution of P-glycoprotein. Life Sci 2008; 83:250-9. [DOI: 10.1016/j.lfs.2008.06.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 05/22/2008] [Accepted: 06/12/2008] [Indexed: 10/21/2022]
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