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Okitsu T, Yoshikawa T, Morohashi M, Aoki K, Yakura T, Sakata K, Hatano M. Boron Trifluoride-Mediated Domino Dehydration/Electrophilic Cyclization of Silylalkynols Leading to 2,3-Fused Tricyclic Benzofulvenes. Org Lett 2024; 26:1652-1656. [PMID: 38385717 DOI: 10.1021/acs.orglett.4c00123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
A BF3-mediated domino dehydration/electrophilic cyclization of silylalkynols to form 2,3-fused tricyclic benzofulvenes was achieved. In the latter step, in situ generated BF3·OH2 enables the electrophilic activation of alkynes. The predominant Z-selectivity of the reaction is also discussed.
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Affiliation(s)
- Takashi Okitsu
- Faculty of Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama 930-0194, Japan
| | - Takeshi Yoshikawa
- Faculty of Pharmaceutical Sciences, Toho University, Funabashi, Chiba 274-8510, Japan
| | - Mai Morohashi
- Faculty of Pharmaceutical Sciences, Kobe Pharmaceutical University, Kobe 658-8558, Japan
| | - Kokoro Aoki
- Faculty of Pharmaceutical Sciences, Toho University, Funabashi, Chiba 274-8510, Japan
| | - Takayuki Yakura
- Faculty of Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama 930-0194, Japan
| | - Ken Sakata
- Faculty of Pharmaceutical Sciences, Toho University, Funabashi, Chiba 274-8510, Japan
| | - Manabu Hatano
- Faculty of Pharmaceutical Sciences, Kobe Pharmaceutical University, Kobe 658-8558, Japan
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2
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Damgalı Ş, Özdemir S, Kaya G, Demirkoz AB, Üner M. Development of monolithic matrix type transdermal patches containing cinnarizine: Physical characterization and permeation studies. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
| | | | | | - Aslı Barla Demirkoz
- Aromsa Besin Aroma ve Katkı Maddeleri Sanayi ve Ticaret Anonim Şirketi, Turkey; Halic University, Turkey
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3
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Wzorek J, Bednarek R, Watala C, Boncler M. Binding of adenosine derivatives to carrier proteins may reduce their antiplatelet activity. Biochem Pharmacol 2020; 174:113827. [PMID: 31987853 DOI: 10.1016/j.bcp.2020.113827] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 01/22/2020] [Indexed: 01/03/2023]
Abstract
Adenosine analogues have high affinity and selectivity for adenosine receptors (AR), and exhibit anti-platelet activity. Plasma proteins play an important role in the regulation of platelet function and may influence the action of anti-platelet compounds. Little is known about the interactions of AR agonists with plasma proteins. This study investigates the interplay between AR agonists and plasma proteins and the consequences of those interactions. Surface plasmon resonance was employed together with molecular docking study to determine the binding kinetics of four selected ARagonists (PSB0777, Cl-Ado, MRE0094, UK432097) to several carrier proteins and to clarify the nature of these interactions. The influence of a whole plasma and of some plasma components on the effectiveness of ARagonists in the inhibition of platelet function was assessed by flow cytometry (platelet activation) and ELISA (platelet adhesion). Plasma proteins remarkably diminished the effectiveness of ARagonists in inhibiting platelet activation and adhesion in vitro. ARagonists were found to strongly bind to human serum albumin (HSA) and the protein components of lipoproteins - apolipoproteins; HSA was essential for the binding of water-soluble PSB0777, whereas apolipoproteins were needed for interactions with poorly-water soluble compounds such as UK432097 and MRE0094. In addition, HSA was shown to significantly reduce the effectiveness of PSB0777 in inhibiting ADP-induced platelet activation. In conclusion, HSA and lipoproteins are important carriers for ARagonists, which can affect pharmacodynamics of ARagonists used as platelet inhibitors.
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Affiliation(s)
- Joanna Wzorek
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
| | - Radosław Bednarek
- Department of Cytobiology and Proteomics, Medical University of Lodz, Lodz, Poland
| | - Cezary Watala
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland
| | - Magdalena Boncler
- Department of Haemostasis and Haemostatic Disorders, Medical University of Lodz, Lodz, Poland.
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4
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Xu Y, Hong T, Chen X, Ji Y. Affinity capillary electrophoresis and fluorescence spectroscopy for studying enantioselective interactions between omeprazole enantiomer and human serum albumin. Electrophoresis 2017; 38:1366-1373. [DOI: 10.1002/elps.201600375] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 02/10/2017] [Accepted: 02/13/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Yujing Xu
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
| | - Tingting Hong
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
| | - Xueping Chen
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
| | - Yibing Ji
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
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5
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Liu N, Lu X, Yang Y, Yao CX, Ning B, He D, He L, Ouyang J. Monitoring binding affinity between drug and α1-acid glycoprotein in real time by Venturi easy ambient sonic-spray ionization mass spectrometry. Talanta 2015; 143:240-244. [DOI: 10.1016/j.talanta.2015.04.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 04/14/2015] [Accepted: 04/17/2015] [Indexed: 11/30/2022]
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6
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Abstract
The present review covers recent advances and important applications of affinity capillary electrophoresis (ACE). It provides an overview about various ACE types, including ACE-MS, the multiple injection mode, the use of microchips and field-amplified sample injection-ACE. The most common scenarios of the studied affinity interactions are protein-drug, protein-metal ion, protein-protein, protein-DNA, protein-carbohydrate, carbohydrate-drug, peptide-peptide, DNA-drug and antigen-antibody. Approaches for the improvements of ACE in term of precision, rinsing protocols and sensitivity are discussed. The combined use of computer simulation programs to support data evaluation is presented. In conclusion, the performance of ACE is compared with other techniques such as equilibrium dialysis, parallel artificial membrane permeability assay, high-performance affinity chromatography as well as surface plasmon resonance, ultraviolet, circular dichroism, nuclear magnetic resonance, Fourier transform infrared, fluorescence, MS and isothermal titration calorimetry.
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Grodner B, Łukaszkiewicz J, Kuran B, Krawiecka M. Capillary electrophoresis separation of aminoalkanol derivatives of 1,7-dimethyl-8,9-diphenyl-4-azatricyclo[5.2.1.0(2,6)]dec-8-ene-3,5,10-trione as potential anticancer drugs. J Sep Sci 2014; 37:3564-70. [PMID: 25280228 DOI: 10.1002/jssc.201400790] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/12/2014] [Accepted: 09/16/2014] [Indexed: 12/17/2022]
Abstract
The purpose of this study, the direct separation of aminoalkanol derivatives I and II of 1,7-dimethyl-8,9-diphenyl-4-azatricyclo[5.2.1.0(2,6) ]dec-8-ene-3,5,10-trione, which was found in earlier studies as potential anticancer drugs, were performed. Capillary electrophoresis offers the possibility of fast, cheap, and reproducible separations for compounds I and II. In this paper, the simultaneous separation of I and II by capillary zone electrophoresis has been achieved within 8 min by use of 50 mM phosphate buffer of pH 2.5. Analysis of the two compounds in the serum plasma standards was conducted. Limits of detection of I and II by UV absorbance at 200 nm were achieved in the range of 156.3-156.6 ng/mL. The method was validated for linearity, accuracy, precision, limits of detection, and quantification. The calibration equation revealed a good linear relationship (r(2) = 0.998-0.999). Sufficient recovery was observed in the range of 96.3-99.5%. The method showed good reproducibility with intra- and interday precision of 0.97 and 1.76%, respectively. The quantification limits for the compounds were in the range of 477.0-479.8 ng/mL. The proposed method was applied to the analysis of real serum samples.
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Affiliation(s)
- Błażej Grodner
- Chair and Department of Biochemistry and Clinical Chemistry, Medical University of Warsaw, Warsaw, Poland
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8
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Raymundo-Pereira PA, Teixeira MF, Fatibello-Filho O, Dockal ER, Bonifácio VG, Marcolino-Junior LH. Electrochemical sensor for ranitidine determination based on carbon paste electrode modified with oxovanadium (IV) salen complex. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4081-5. [DOI: 10.1016/j.msec.2013.05.051] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 05/10/2013] [Accepted: 05/25/2013] [Indexed: 11/16/2022]
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9
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Chen J, Zhou X, Zhang Y, Gao H. Potential toxicity of sulfanilamide antibiotic: binding of sulfamethazine to human serum albumin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 432:269-274. [PMID: 22750172 DOI: 10.1016/j.scitotenv.2012.06.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 04/06/2012] [Accepted: 06/02/2012] [Indexed: 06/01/2023]
Abstract
Antibiotics are widely used in daily life but their abuse has posed a potential threat to human health. The interaction between human serum albumin (HSA) and sulfamethazine (SMZ) was investigated by capillary electrophoresis, fluorescence spectrometry, and circular dichroism. The binding constant and site were determined to be 1.09×10(4) M(-1) and 1.14 at 309.5 K. The thermodynamic determination indicated that the interaction was driven by enthalpy change, where the electrostatic interaction and hydrogen bond were the dominant binding force. The binding distance between SMZ and tryptophan residue of HSA was obtained to be 3.07 nm according to Fǒrster non-radioactive energy transfer theory. The site marker competition revealed that SMZ bound into subdomain IIA of HSA. The binding of SMZ induced the unfolding of the polypeptides of HSA and transferred the secondary conformation of HSA. The equilibrium dialysis showed that only 0.13 mM SMZ decreased vitamin B(2) by 38% transported on the HSA. This work provides a new quantitative evaluation method for antibiotics to cause the protein damage.
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Affiliation(s)
- Jiabin Chen
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
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10
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Tardioli S, Lammers I, Hooijschuur JH, Ariese F, van der Zwan G, Gooijer C. Complementary Fluorescence and Phosphorescence Study of the Interaction of Brompheniramine with Human Serum Albumin. J Phys Chem B 2012; 116:7033-9. [DOI: 10.1021/jp300055c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Silvia Tardioli
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Ivonne Lammers
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Jan-Hein Hooijschuur
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Freek Ariese
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Gert van der Zwan
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
| | - Cees Gooijer
- Department of Biomolecular Analysis and Spectroscopy,
LaserLaB, VU University Amsterdam, De Boelelaan
1083, 1081 HV Amsterdam, The Netherlands
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11
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Tardioli S, Buijs J, Gooijer C, van der Zwan G. pH-dependent complexation of histamine H1 receptor antagonists and human serum albumin studied by UV resonance Raman spectroscopy. J Phys Chem B 2012; 116:3808-15. [PMID: 22372713 DOI: 10.1021/jp206409d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
UV resonance Raman spectroscopy was used to characterize the binding of three first-generation histamine H(1) receptor antagonists-tripelennamine (TRP), mepyramine (MEP), and brompheniramine (BPA)-to human serum albumin (HSA) at pH 7.2 and pH 9.0. Binding constants differ at these pH values, which can be ascribed to the different extent of protonation of the ethylamino side chain of the ligands. We have recently shown [Tardioli et al. J. Raman Spectrosc. 2011, 42, 1016-1024] that for the solution conformation of TRP and MEP the side chain plays an important role by allowing an internal hydrogen bond with the aminopyridine nitrogen in TRP and MEP. Results presented in this paper suggest that the existence of such molecular structures has serious biological significance on the binding affinity of those ligands to HSA. At pH 7.2, only the stretched conformers of protonated TRP and MEP bind in HSA binding site I. Using UV absorption data, we derived binding constants for the neutral and protonated forms of TRP to HSA. The neutral species seems to be conjugated to a positive group of the protein, affecting both the tryptophan W214 and some of the tyrosine (Y) vibrations. BPA, for which the structure with an intramolecular hydrogen bonded side chain is not possible, is H bound to the indole ring nitrogen of W214, of which the side chain rotates over a certain angle to accommodate the drug in site I. We propose that the protonated BPA is also bound in site I, where the Y150 residue stabilizes the presence of this compound in the binding pocket. No spectroscopic evidence was found for conformational changes of the protein affecting the spectroscopic properties of W and Y in this pH range.
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Affiliation(s)
- Silvia Tardioli
- Amsterdam LaserLaB, Department of Biomolecular Analysis and Spectroscopy, Vrije Universiteit, Amsterdam, The Netherlands
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12
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Asensi-Bernardi L, Martín-Biosca Y, Sagrado S, Medina-Hernández MJ. Electrokinetic chromatographic estimation of the enantioselective binding of nomifensine to human serum albumin and total plasma proteins. Biomed Chromatogr 2012; 26:1357-63. [DOI: 10.1002/bmc.2704] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 12/15/2011] [Accepted: 12/15/2011] [Indexed: 01/01/2023]
Affiliation(s)
- Lucía Asensi-Bernardi
- Departamento de Química Analítica, Facultad de Farmacia; Universidad de Valencia; Burjassot; Valencia; Spain
| | - Yolanda Martín-Biosca
- Departamento de Química Analítica, Facultad de Farmacia; Universidad de Valencia; Burjassot; Valencia; Spain
| | | | - María J. Medina-Hernández
- Departamento de Química Analítica, Facultad de Farmacia; Universidad de Valencia; Burjassot; Valencia; Spain
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13
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Locatelli M, Governatori L, Carlucci G, Genovese S, Mollica A, Epifano F. Recent application of analytical methods to phase I and phase II drugs development: a review. Biomed Chromatogr 2011; 26:283-300. [DOI: 10.1002/bmc.1674] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 06/13/2011] [Accepted: 06/15/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Marcello Locatelli
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Luciana Governatori
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Giuseppe Carlucci
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Salvatore Genovese
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Adriano Mollica
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Francesco Epifano
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
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14
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Li X, Xu X, Albano DR, You T. Optimization using central composite design for antihistamines separation by nonaqueous capillary electrophoresis with electrochemical and electrochemiluminescence detections. Analyst 2011; 136:5294-301. [DOI: 10.1039/c1an15730b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Rambla-Alegre M, Peris-Vicente J, Esteve-Romero J, Capella-Peiró ME, Bose D. Capillary electrophoresis determination of antihistamines in serum and pharmaceuticals. Anal Chim Acta 2010; 666:102-9. [DOI: 10.1016/j.aca.2010.03.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 03/11/2010] [Accepted: 03/18/2010] [Indexed: 10/19/2022]
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16
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Pharmacokinetics of pefloxacin mesylate in human urine using capillary electrophoresis electrochemiluminescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:2585-8. [DOI: 10.1016/j.jchromb.2009.06.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2008] [Revised: 06/07/2009] [Accepted: 06/12/2009] [Indexed: 11/17/2022]
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17
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Gencoglu A, Minerick A. Chemical and morphological changes on platinum microelectrode surfaces in AC and DC fields with biological buffer solutions. LAB ON A CHIP 2009; 9:1866-73. [PMID: 19532961 DOI: 10.1039/b820126a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Platinum is widely considered a noncorrodible and inert microelectrode material for many electrokinetic microdevice applications. However, platinum reactions are well documented in the literature. Reproducibility of cellular electrokinetic microdevice responses were inconsistent and suggested a dependance on platinum microelectrode function with exposure time in electric fields. Chemical and morphological changes on the surface of platinum microelectrodes in 1 V(pp)/175 microm and 6 V(pp)/175 microm AC and +/-3 V/175 microm DC electric fields in the presence of five biological buffer solutions were investigated. Platinum dissolution, platinum redeposition, chloride formation and oxide formation on platinum microelectrode surfaces were observed by scanning electron microscopy and energy dispersive spectroscopy under ordinary microdevice conditions and verified by cyclic voltammetry studies. X-ray photoelectron spectroscopy showed the presence of oxygen and oxidation of platinum on microelectrode surfaces. Changes were more severe in a 6 V(pp)/175 microm AC field than in a 1 V(pp)/175 microm AC field, and more severe in +/-3 V/175 microm DC fields than in a 6 V(pp)/175 microm AC field.
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Affiliation(s)
- Aytug Gencoglu
- Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State 39762, USA
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18
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Sun H, He P. Characterization of interaction between doxycycline and human serum albumin by capillary electrophoresis‐frontal analysis. Electrophoresis 2009; 30:1991-7. [DOI: 10.1002/elps.200800470] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Liu X, Dahdouh F, Salgado M, Gomez FA. Recent Advances in Affinity Capillary Electrophoresis (2007). J Pharm Sci 2009; 98:394-410. [DOI: 10.1002/jps.21452] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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20
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Xiong C, Xia Z, Huang R, Chen H, Xu P. Establishment and application of a new method for the determination of kinetic parameters by plug-plug kinetic capillary electrophoresis (ppKCE). ACTA ACUST UNITED AC 2008. [DOI: 10.1007/s11426-008-0092-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Sun H, He P. Characterization of Interactions Between Fluoroquinolones and Human Serum Albumin by CE–Frontal Analysis. Chromatographia 2008. [DOI: 10.1365/s10337-008-0814-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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22
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Zhao P, Zhu G, Zhang W, Zhang L, Liang Z, Zhang Y. Study of multiple binding constants of dexamethasone with human serum albumin by capillary electrophoresis–frontal analysis and multivariate regression. Anal Bioanal Chem 2008; 393:257-61. [DOI: 10.1007/s00216-008-2373-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2008] [Revised: 08/21/2008] [Accepted: 08/25/2008] [Indexed: 11/24/2022]
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23
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Kandagal PB, Kalanur SS, Manjunatha DH, Seetharamappa J. Mechanism of interaction between human serum albumin and N-alkyl phenothiazines studied using spectroscopic methods. J Pharm Biomed Anal 2008; 47:260-7. [PMID: 18313253 DOI: 10.1016/j.jpba.2008.01.027] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Revised: 12/28/2007] [Accepted: 01/03/2008] [Indexed: 11/16/2022]
Abstract
The binding characteristics of human serum albumin (HSA) with N-alkyl phenothiazines derivatives (NAP) viz., levomepromazine monomaleate (LMM) and propericiazine (PPC) have been studied by employing fluorescence, absorption, circular dichroism and FT-IR techniques. The Stern-Volmer quenching constant, K(SV) values were found to decrease with increase in temperature thereby indicating the presence of static quenching mechanism in the interactions of NAP with HSA. The number of binding sites, n and the binding constant, K were noticed to be, respectively, 1.11 and (5.188+/-0.034)x10(4) M(-1) for LMM and 1.06 and (4.436+/-0.066)x10(4) M(-1) for PPC at 298 K. The negative value of enthalpy change and positive value of entropy change in the present study indicated that the hydrophobic forces played a major role in the binding of NAP to HSA. The circular dichroism and FT-IR spectral data revealed the conformational changes in the structure of protein upon its interaction with NAP. The binding distances and the energy transfer efficiency between NAP and protein were determined based on Förster's theory of energy transfer. The decreased binding constants of HAS-LMM and HAS-PPC systems in presence of common ions indicated the availability of higher concentration of free drug in plasma.
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Affiliation(s)
- P B Kandagal
- Department of Chemistry, Karnatak University, Dharwad, India
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24
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Song EJ, Babar SME, Oh E, Hasan MN, Hong HM, Yoo YS. CE at the omics level: Towards systems biology – An update. Electrophoresis 2008; 29:129-42. [DOI: 10.1002/elps.200700467] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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25
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Martínez-Gómez MA, Villanueva-Camañas RM, Sagrado S, Medina-Hernández MJ. Evaluation of enantioselective binding of basic drugs to plasma by ACE. Electrophoresis 2007; 28:3056-63. [PMID: 17661317 DOI: 10.1002/elps.200700222] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The present paper deals with the evaluation of the stereoselective binding of antihistamines (brompheniramine, chlorpheniramine, hydroxyzine, orphenadrine and phenindamine), phenothiazines (promethazine and trimeprazine) and a local anesthetic (bupivacaine) to human plasma proteins. Since all of them are drugs highly bound to proteins, a methodology to determine the bound fraction of each drug enantiomer was proposed. This methodology includes the incubation of samples containing plasma and racemic drug, ultrafiltration of the mixture and the chiral separation of enantiomers in the bound drug fraction using affinity EKC (AEKC)-partial filling technique and HSA as chiral selector. The results shown in this paper represent the first evidence of the enantioselective binding of some antihistamines such as brompheniramine, hydroxyzine, orphenadrine and phenindamine and the phenothiazines, promethazine and trimeprazine, to human plasma proteins. The binding of phenindamine to plasma presented the highest enantioselectivity (ES) (ES = 2.5) followed by trimeprazine (ES = 1.5) and promethazine (ES = 1.4).
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Affiliation(s)
- María Amparo Martínez-Gómez
- Departament de Química Analítica, Facultat de Farmacia, Universitat de Valencia, C/Vicent Andrés Estellés s/n, Valencia, Spain
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