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Escuder-Gilabert L, Martínez-Gómez MA, Villanueva-Camañas RM, Sagrado S, Medina-Hernández MJ. Microseparation techniques for the study of the enantioselectivity of drug-plasma protein binding. Biomed Chromatogr 2009; 23:225-38. [DOI: 10.1002/bmc.1134] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Protein binding study of catechin hydrate and genistein by high-performance frontal analysis. KOREAN J CHEM ENG 2008. [DOI: 10.1007/s11814-008-0242-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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3
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Yoon YJ, Kim KB, Kim H, Seo KA, Kim HS, Cha IJ, Kim EY, Liu KH, Shin JG. Characterization of benidipine and its enantiomers' metabolism by human liver cytochrome P450 enzymes. Drug Metab Dispos 2007; 35:1518-24. [PMID: 17537876 DOI: 10.1124/dmd.106.013607] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Benidipine is a dihydropyridine calcium antagonist that has been used clinically as an antihypertensive and antianginal agent. It is used clinically as a racemate, containing the (-)-alpha and (+)-alpha isomers of benidipine. This study was performed to elucidate the metabolism of benidipine and its enantiomers in human liver microsomes (HLMs) and to characterize the cytochrome P450 (P450) enzymes that are involved in the metabolism of benidipine. Human liver microsomal incubation of benidipine in the presence of NADPH resulted in the formation of two metabolites, N-desbenzylbenidipine and dehydrobenidipine. The intrinsic clearance (CL(int)) of the formation of N-desbenzylbenidipine and dehydrobenidipine metabolites from (-)-alpha isomer was similar to those from the (+)-alpha isomer (1.9 +/- 0.1 versus 2.3 +/- 2.3 microl/min/pmol P450 and 0.5 +/- 0.2 versus 0.6 +/- 0.6 microl/min/pmol P450, respectively). Correlation analysis between the known P450 enzyme activities and the rate of the formation of benidipine metabolites in the 15 HLMs showed that benidipine metabolism is correlated with CYP3A activity. The P450 isoform-selective inhibition study in liver microsomes and the incubation study of cDNA-expressed enzymes also showed that theN-debenzylation and dehydrogenation of benidipine are mainly mediated by CYP3A4 and CYP3A5. The total CL(int) values of CYP3A4-mediated metabolite formation from (-)-alpha isomer were similar to those from (+)-alpha isomer (17.7 versus 14.4 microl/min/pmol P450, respectively). The total CL(int) values of CYP3A5-mediated metabolite formation from (-)-alpha isomer were also similar to those from (+)-alpha isomer (8.3 versus 11.0 microl/min/pmol P450, respectively). These findings suggest that CYP3A4 and CYP3A5 isoforms are major enzymes contributing to the disposition of benidipine, but stereoselective disposition of benidipine in vivo may be influenced not by stereoselective metabolism but by other factors.
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Affiliation(s)
- Yune-Jung Yoon
- Department of Pharmacology and PharmacoGenomics Research Center, Inje University College of Medicine, 633-165, Gaegum-Dong, Busanjin-Gu, Busan 614-735, South Korea
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Wang D, Song MS, Yang G, Row KH. Protein Binding Study of Perillyl Alcohol Enantiomers by High Performance Frontal Analysis. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120025049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Dexian Wang
- a Department of Chemical Engineering, Center for Advanced Bioseparation Technology , Inha University , 253 Yonghyun‐Dong, Nam‐Ku, Incheon , 402‐751 , Korea
- b Department of Chemistry , Hebei University , Baoding , P.R. China
| | - Myong Seok Song
- a Department of Chemical Engineering, Center for Advanced Bioseparation Technology , Inha University , 253 Yonghyun‐Dong, Nam‐Ku, Incheon , 402‐751 , Korea
| | - Gengliang Yang
- b Department of Chemistry , Hebei University , Baoding , P.R. China
| | - Kyung Ho Row
- a Department of Chemical Engineering, Center for Advanced Bioseparation Technology , Inha University , 253 Yonghyun‐Dong, Nam‐Ku, Incheon , 402‐751 , Korea
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5
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Kimura T, Nakanishi K, Nakagawa T, Shibukawa A, Matsuzaki K. Simultaneous determination of unbound thyroid hormones in human plasma using high performance frontal analysis with electrochemical detection. J Pharm Biomed Anal 2005; 38:204-9. [PMID: 15925209 DOI: 10.1016/j.jpba.2004.12.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2004] [Revised: 12/15/2004] [Accepted: 12/18/2004] [Indexed: 10/25/2022]
Abstract
A direct injection HPLC method in combination with high-performance frontal analysis (HPFA) and electrochemical detection (ECD) was developed for the simultaneous and sensitive determination of unbound thyroid hormones (thyroxine, triiodothyronine, and reverse triiodothyronine) in human plasma. The present on-line HPLC/HPFA system consists of an HPFA column, an extraction column and an analytical HPLC column connected through a column-switching device, and the eluent from the analytical column was monitored by ECD. The calibration lines showed good linearity (rsq.>0.999) within 7.4-148.2 pM for T4 and 1.5-74.1 pM for T3 and rT3. Unbound T4 and T3 concentrations determined by the present system were 16.4+/-2.4 pM (n=15) and 7.14+/-1.04 pM (n=15), which were in agreement with those determined by the EIA method. The unbound rT3 concentration was 2.30+/-0.27 pM (n=15). The CV% values of intra-day and inter-day assays (n=15) were less than 14.9% for T4, 14.5% for T3 and 13.2% for rT3. The present system was also applied to a competitive binding study of these thyroid hormones in human plasma.
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Affiliation(s)
- Tomoko Kimura
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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6
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Choi DY, Jin LM, Wang D, Row KH. Protein binding study of isoflavone, perillyl alcohol and S-ibuprofen by high-performance frontal analysis. KOREAN J CHEM ENG 2005. [DOI: 10.1007/bf02719427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Kimura T, Nakanishi K, Nakagawa T, Shibukawa A, Matsuzaki K. High-Performance Frontal Analysis of the Binding of Thyroxine Enantiomers to Human Serum Albumin Binding of Thyroxine Enantiomers to Human Serum Albumin Kimura. Pharm Res 2005; 22:667-75. [PMID: 15846475 DOI: 10.1007/s11095-005-2485-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2004] [Accepted: 12/15/2004] [Indexed: 11/30/2022]
Abstract
PURPOSE The aim of this study was to characterize the binding property between thyroxine and human serum albumin (HSA) qualitatively and enantioselectively using high-performance frontal analysis (HPFA). METHODS An on-line HPLC system consisting of an HPFA column, an extraction column, and an analytical HPLC column was developed to be used to determine the unbound concentrations of thyroxine enantiomers. RESULTS Both enantiomers were bound to human serum albumin at two high-affinity sites with similar affinities. The binding constant (K) and the number of binding sites on an HSA molecule (n) evaluated from Scatchard plot analysis were K = 1.01 x 10(6)m(-1) and n = 1.90 for L: -thyroxine, and K = 9.71 x 10(5) m(-1) and n = 1.97 for D: -thyroxine. The binding sites were identified using phenylbutazone and diazepam as site-specific probes for sites I and II, respectively, and each enantiomer was found to bind to both sites. Incorporation of a chiral HPLC column into the on-line system permitted the investigation of enantiomer-enantiomer interactions, which revealed that both enantiomers competitively bind to the same binding sites without significant allosteric effects.
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Affiliation(s)
- Tomoko Kimura
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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8
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Song MS, Wang D, Row KH. Protein Binding Study of Isoflavones by High-Performance Frontal Analysis. Chromatographia 2004. [DOI: 10.1365/s10337-004-0212-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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9
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Bojarski J. Stereoselective chromatography of cardiovascular drugs: an update. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2002; 54:197-220. [PMID: 12543499 DOI: 10.1016/s0165-022x(02)00143-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This review reports the latest achievements in chromatographic enantioseparations of various classes of cardiovascular drugs and selected applications of these methods in pharmaceutical and clinical analysis. The use of these drugs as test compounds for new chiral stationary phases and different parameters of chromatographic processes is also presented.
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Affiliation(s)
- Jacek Bojarski
- Department of Organic Chemistry, Medical College, Faculty of Pharmacy, Jagiellonian University, Medyczna 9, 30-688 Cracow, Poland.
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Kawahara K, Kuniyasu A, Masuda K, Ishiguro M, Nakayama H. Efficient identification of photolabelled amino acid residues by combining immunoaffinity purification with MS: revealing the semotiadil-binding site and its relevance to binding sites for myristates in domain III of human serum albumin. Biochem J 2002; 363:223-32. [PMID: 11931649 PMCID: PMC1222470 DOI: 10.1042/0264-6021:3630223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To identify photoaffinity-labelled amino acid residue(s), we devised an effective method utilizing immunoaffinity purification of photolabelled fragments, followed by matrix-assisted laser-desorption ionization-time of flight (MALDI-TOF) MS and nanoelectrospray ionization tandem MS (nano-ESI-MS/MS) analysis. Human serum albumin (HSA) was photolabelled with an azidophenyl derivative of semotiadil, FNAK [(+)-(R)-3,4-dihydro-2-[5-methoxy-2-[3-[N-methyl-N-[2-(3-azidophenoxy)-ethyl]amino]propoxyl]phenyl]-4-methyl-2H-1,4-benzothiazin-3-(4H)-one], since HSA is a major binding protein for semotiadil in serum. After lysyl endopeptidase digestion, photolabelled HSA fragments were adsorbed selectively on to Sepharose beads on which an anti-semotiadil antibody was immobilized, and fractions were eluted quantitatively by 50% acetonitrile/10 mM HCl. MALDI-TOF MS analysis of the eluted fraction showed that it contained two photolabelled fragments of m/z 2557.54 (major) and 1322.44 (minor), corresponding to Lys-414-Lys-432 and Ala-539-Lys-545, respectively. Further nano-ESI-MS/MS analysis revealed that Lys-414 was the photolabelled amino acid residue in fragment 414-432 and Lys-541 was a likely candidate in fragment 539-545. Based on the photolabelling results, we constructed a three-dimensional model of the FNAK-HSA complex, revealing that FNAK resides in a pocket that overlaps considerably with myristate (Myr)-binding sites, Myr-3 and -4, by comparison with crystallographic data of HSA-Myr complexes described in Curry, Mandelkow, Brick and Franks (1998) Nat. Struct. Biol. 5, 827-835. Moreover, addition of Myr increased photo-incorporation into Lys-414, whereas incorporation into Lys-541 decreased under conditions of [Myr]/[HSA]<1. Further addition of Myr, however, uniformly decreased photo-incorporation into both Lys residues. These results indicate that FNAK labelling can also be used to monitor Myr binding in domain III. An interpretation for the concomitant local conformational change of HSA is provided.
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Affiliation(s)
- Kohichi Kawahara
- Department of Biofunctional Chemistry, Faculty of Pharmaceutical Sciences, Kumamoto University, 5-1 Ohe-honmachi, Kumamoto 862-0973, Japan
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Shibukawa A, Ishizawa N, Kimura T, Sakamoto Y, Ogita K, Matsuo Y, Kuroda Y, Matayatsu C, Nakagawa T, Wainer IW. Plasma protein binding study of oxybutynin by high-performance frontal analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 768:177-88. [PMID: 11939551 DOI: 10.1016/s0378-4347(01)00497-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Plasma protein binding of oxybutynin (OXY) was investigated quantitatively and enantioselectively using high-performance frontal analysis (HPFA). An on-line HPLC system which consists of HPFA column, extraction column and analytical column was developed to determine the unbound concentrations of OXY enantiomers in human plasma, in human serum albumin (HSA) solutions, and in human alpha1-acid glycoprotein (AGP) solutions. OXY is bound in human plasma strongly and enantioselectively. The bound drug fraction in human plasma containing 2-10 microM (R)- or (S)-OXY was higher than 99%, and the unbound fraction of (R)-OXY was 1.56 times higher than that of (S)-isomer. AGP plays the dominant role in this strong and enantioselective plasma protein binding. The total binding affinities (nK) of (R)- and (S)-OXY to AGP were 6.86 x 10(6) and 1.53 x 10(7) M(-1), respectively, while the nK values of (R)- and (S)-OXY to HSA were 2.64 x 10(4) and 2.19 x 10(-4) M(-1), respectively. The binding affinity of OXY to AGP is much higher than that to HSA, and shows high enantioselectivity (SIR ratio of nK values is 2.2). It was found that both enantiomers are bound competitively at the same binding site on an AGP molecule. The binding property between OXY and low density lipoprotein (LDL) was investigated by using the frontal analysis method incorporated in high-performance capillary electrophoresis (HPCE/FA). It was found the binding is non-saturable and non-enantioselective.
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Affiliation(s)
- Akimasa Shibukawa
- Graduate School of Pharmaceutical Sciences, Kyoto University, Japan.
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Abstract
For about half a century, the binding of drugs to plasma albumin, the "silent receptor," has been recognized as one of the major determinants of drug action, distribution, and disposition. In the last decade, the binding of drugs, especially but not exclusively basic entities, to another plasma protein, alpha 1-acid glycoprotein (AAG), has increasingly become important in this regard. The present review points out that hundreds of drugs with diverse structures bind to this glycoprotein. Although plasma concentration of AAG is much lower than that of albumin, AAG can become the major drug binding macromolecule in plasma with significant clinical implications. Also, briefly reviewed are the physiological, pathological, and genetic factors that influence binding, the role of AAG in drug-drug interactions, especially the displacement of drugs and endogenous substances from AAG binding sites, and pharmacokinetic and clinical consequences of such interactions. It can be predicted that in the future, rapid automatic methods to measure binding to albumin and/or AAG will routinely be used in drug development and in clinical practice to predict and/or guide therapy.
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Affiliation(s)
- Z H Israili
- Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA.
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Rodriguez Rosas ME, Shibukawa A, Yoshikawa Y, Kuroda Y, Nakagawa T. Binding study of semotiadil and levosemotiadil with alpha(1)-acid glycoprotein using high-performance frontal analysis. Anal Biochem 1999; 274:27-33. [PMID: 10527493 DOI: 10.1006/abio.1999.4266] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
High-performance frontal analysis (HPFA) was used to investigate the binding properties of human alpha(1)-acid glycoprotein (AGP) with semotiadil ((R)-isomer, Ca-channel blocker) and its antipode levosemotiadil ((S)-isomer, Ca- and Na-channel blockers). An on-line HPLC system consisting of a HPFA column, an extraction column, and an analytical HPLC column was used to determine the unbound concentrations of these enantiomers, and the experimental data were subsequently subjected to the Scatchard analyses to estimate their binding parameters. The binding affinity of the (R)-isomer (K = 3.17 x 10(7) M, n = 0.74) is approximately 1.2 times stronger than that of (S)-isomer (K = 2.59 x 10(7) M, n = 0.74). An enantioselective competitive binding study indicated that both enantiomers are bound at the same site on AGP molecules.
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Affiliation(s)
- M E Rodriguez Rosas
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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Shibukawa A, Kuroda Y, Nakagawa T. Development of high-performance frontal analysis and the application to the study of drug–plasma protein binding. Trends Analyt Chem 1999. [DOI: 10.1016/s0165-9936(99)00136-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Shibukawa A, Kuroda Y, Nakagawa T. High-performance frontal analysis for drug-protein binding study. J Pharm Biomed Anal 1999; 18:1047-55. [PMID: 9925341 DOI: 10.1016/s0731-7085(98)00201-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High-performance frontal analysis (HPFA) is a novel analytical method which enables simultaneous determination of total and unbound drug concentrations under drug-plasma protein binding condition. HPFA can be achieved using separation systems such as HPLC and CE. This paper deals with the principle and feature of HPFA method and its application to the stereoselective protein binding study. HPFA allows a simple analysis following direct sample injection, and does not suffer from undesirable drug adsorption on membrane nor leakage of bound drug through the membrane which are often encountered in conventional ultrafiltration and dialysis methods. HPFA can be easily incorporated into on-line HPLC system. By coupling HPFA with a chiral HPLC column, the unbound concentration of a racemic drug can be determined enantioselectively. The detection limit can be improved by coupling of HPFA with a preconcentration column. High-performance capillary electrophoresis/frontal analysis (HPCE/FA) enables to determine unbound concentrations enantioselectively with ultramicro injection volume, and is hence useful especially for the binding study of proteins which are scarce and difficult to obtain.
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Affiliation(s)
- A Shibukawa
- Graduate School of Pharmaceutical Sciences, Kyoto University, Japan.
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ROSAS MER, SHIBUKAWA A, YOSHIKAWA Y, KURODA Y, NAKAGAWA T. Binding Study of Semotiadil and Levosemotiadil with Human Serum Albumin Using High-Performance Frontal Analysis. ANAL SCI 1999. [DOI: 10.2116/analsci.15.217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | | | - Yuki YOSHIKAWA
- Graduate School ofPharmaceutical Sciences, Kyoto University
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