1
|
Miyabe K, Ishitobi A, Hiyama K, Kubotani F. Moment Analysis Method for Measurement of Reaction Equilibrium and Rate Constants by Using High-Performance Liquid Chromatography. Anal Chem 2024; 96:4553-4561. [PMID: 38457369 DOI: 10.1021/acs.analchem.3c05387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2024]
Abstract
The moment analysis method was developed for the determination of association equilibrium constant (KA) and association (ka) and dissociation (kd) rate constants of intermolecular interactions between solute and ligand molecules. They are accurately determined by using moment equations from elution peak profiles because they are measured by using high-performance liquid chromatography (HPLC) under preferable conditions that neither immobilization nor chemical modification (i.e., fluorescence labeling) of solute and ligand molecules is required. To demonstrate the effectiveness of the method, it was applied to the inclusion complex formation system between dibenzo-18-crown-6 (DB18C6) and alkaline earth metal cations, i.e., Mg2+, Ca2+, and Sr2+, as a concrete example. Because the diameter of the three metal cations is smaller than that of the inner cavity of DB18C6, the values of KA, ka, and kd were analytically determined by assuming the stoichiometry of 1:1 between DB18C6 and the metal cation. They reflected the influence of the difference in the size between the inner cavity of DB18C6 and the metal cations on the inclusion complex formation. It seems that the moment analysis method based on HPLC separation is effective for the multifaceted analysis of chemical reactions because some characteristics of the method are different from those of other conventional methods. It must contribute to the dissemination of an opportunity for the study of chemical reactions to many researchers because of the versatility of HPLC.
Collapse
Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Amane Ishitobi
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Kanoko Hiyama
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Fuzuki Kubotani
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| |
Collapse
|
2
|
Miyabe K, Arai A, Ishizuka M. Moment Theory of Chromatography for the Analysis of Reaction Kinetics of Intermolecular Interactions. Anal Chem 2021; 93:10365-10371. [PMID: 34258992 DOI: 10.1021/acs.analchem.1c02111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Moment theory was applied to the kinetic study of intermolecular interactions. The association equilibrium constant (KA) and association (ka) and dissociation (kd) rate constants of chemical reactions were analytically determined on the basis of the moment theory from elution peak profiles measured by high-performance liquid chromatography (HPLC). The HPLC data were measured under the conditions that neither immobilization nor fluorescence labeling of solute and ligand molecules is required. These are the advantages of the moment analysis method for determining accurate values of KA, ka, and kd. Moment equations were developed on the basis of the Einstein equation for diffusion, the random walk model, and the general rate model of chromatography. The moment analysis method was applied to the inclusion complex formation system between dibenzo-18-crown-6 or dibenzo-15-crown-5 and alkali metal cations. It was demonstrated that the values of KA, ka, and kd can be determined on the assumption that the stoichiometry between crown ethers and cations is 1:1 or 2:1. The influence of the difference in the size between the inner cavity of crown ethers and cations on the association and dissociation of the inclusion complex was considered. The moment analysis method using HPLC is effective for analyzing intermolecular interactions from various perspectives because it is based on the separation technique and has different characteristics from other methods such as spectroscopy. The results of this study contribute to the dissemination of an opportunity for studying intermolecular interactions from equilibrium and kinetic points of view to many researchers because HPLC is widespread.
Collapse
Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Ayaka Arai
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Mana Ishizuka
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| |
Collapse
|
3
|
Moment analysis of peak broadening in affinity capillary electrophoresis and electrokinetic chromatography. J Chromatogr A 2020; 1609:460451. [DOI: 10.1016/j.chroma.2019.460451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/02/2019] [Accepted: 08/12/2019] [Indexed: 11/22/2022]
|
4
|
Iftekhar S, Ovbude ST, Hage DS. Kinetic Analysis by Affinity Chromatography. Front Chem 2019; 7:673. [PMID: 31681727 PMCID: PMC6813734 DOI: 10.3389/fchem.2019.00673] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/25/2019] [Indexed: 12/24/2022] Open
Abstract
Important information on chemical processes in living systems can be obtained by the rates at which these biological interactions occur. This review will discuss several techniques based on traditional and high-performance affinity chromatography that may be used to examine the kinetics of biological reactions. These methods include band-broadening measurements, techniques for peak fitting, split-peak analysis, peak decay studies, and ultrafast affinity extraction. The general principles and theory of each method, as applied to the determination of rate constants, will be discussed. The applications of each approach, along with its advantages and limitations, will also be considered.
Collapse
Affiliation(s)
| | | | - David S. Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, United States
| |
Collapse
|
5
|
Hu Y, Miao ZY, Zhang XJ, Yang XT, Tang YY, Yu S, Shan CX, Wen HM, Zhu D. Preparation of Microkernel-Based Mesoporous (SiO2–CdTe–SiO2)@SiO2 Fluorescent Nanoparticles for Imaging Screening and Enrichment of Heat Shock Protein 90 Inhibitors from Tripterygium Wilfordii. Anal Chem 2018; 90:5678-5686. [DOI: 10.1021/acs.analchem.7b05295] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
6
|
Hu Y, Fu A, Miao Z, Zhang X, Wang T, Kang A, Shan J, Zhu D, Li W. Fluorescent ligand fishing combination with in-situ imaging and characterizing to screen Hsp 90 inhibitors from Curcuma longa L. based on InP/ZnS quantum dots embedded mesoporous nanoparticles. Talanta 2018; 178:258-267. [DOI: 10.1016/j.talanta.2017.09.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/05/2017] [Accepted: 09/12/2017] [Indexed: 01/08/2023]
|
7
|
Miyabe K, Suzuki N. Moment Analysis Theory for Size Exclusion Capillary Electrochromatography with Chemical Reaction of Intermolecular Interaction. ANAL SCI 2017; 33:1147-1154. [PMID: 28993589 DOI: 10.2116/analsci.33.1147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
New moment equations were developed for size exclusion capillary electrochromatography (SECEC), in which intermolecular chemical reactions simultaneously took place. They explain how the first absolute and second central moments of elution peaks are correlated with some fundamental equilibrium and kinetic parameters of mass transfer and chemical reaction in SECEC column. In order to demonstrate the effectiveness of the moment equations, they were used to predict chromatographic behavior under hypothetical SECEC conditions. It was quantitatively studied how the association and dissociation rate constants of intermolecular interaction affected the position and spreading of elution peaks. It was indicated that both the intermolecular reaction kinetics and axial dispersion of solute molecules in a capillary column had a predominant contribution to the band broadening.
Collapse
Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University
| | - Nozomu Suzuki
- Department of Chemistry, Faculty of Science, Rikkyo University
| |
Collapse
|
8
|
Bi C, Beeram S, Li Z, Zheng X, Hage DS. Kinetic analysis of drug-protein interactions by affinity chromatography. DRUG DISCOVERY TODAY. TECHNOLOGIES 2015; 17:16-21. [PMID: 26724332 DOI: 10.1016/j.ddtec.2015.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 09/14/2015] [Indexed: 10/23/2022]
Abstract
Information on the kinetics of drug-protein interactions is of crucial importance in drug discovery and development. Several methods based on affinity chromatography have been developed in recent years to examine the association and dissociation rates of these processes. These techniques include band-broadening measurements, the peak decay method, peak fitting methods, the split-peak method, and free fraction analysis. This review will examine the general principles and applications of these approaches and discuss their use in the characterization, screening and analysis of drug-protein interactions in the body.
Collapse
Affiliation(s)
- Cong Bi
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Sandya Beeram
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Zhao Li
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - Xiwei Zheng
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588, USA.
| |
Collapse
|
9
|
Miyabe K, Kamiya S. Kinetic Study of the Intermolecular Interaction between 2-Phenoxypropionic Acid and β-Bromo-cyclodextrin Affixed on the Stationary Phase by Liquid Chromatography. ANAL SCI 2015; 31:743-9. [PMID: 26256595 DOI: 10.2116/analsci.31.743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The intermolecular interaction between 2-phenoxypropionic acid and β-bromo-cyclodextrin affixed on the stationary phase surface in a chiral HPLC system was studied by the moment analysis method. At first, pulse response and peak parking experiments were conducted to measure some parameters concerning the column geometry, adsorption equilibrium, and mass-transfer kinetics. Then, the first absolute moment (μ1) and second central moment (μ2') of the elution peaks were analyzed by the moment equations, which were developed by assuming that the reaction kinetics between the solute molecules and the functional ligands can be represented by the Langmuir-type rate equation. Finally, the flow-rate dependence of HETP calculated from μ1 and μ2' was analyzed by using the values of the parameters to determine the association and dissociation rate constants of the intermolecular interaction. It was demonstrated that the combination of the chromatographic experiments and moment analysis is one of the effective strategies for the kinetic study of intermolecular interactions.
Collapse
Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University
| | | |
Collapse
|
10
|
Miyabe K. Moment equations for chromatography based on Langmuir type reaction kinetics. J Chromatogr A 2014; 1356:171-9. [DOI: 10.1016/j.chroma.2014.06.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 06/16/2014] [Accepted: 06/16/2014] [Indexed: 10/25/2022]
|
11
|
Gargano AF, Lämmerhofer M, Lönn H, Schoenmakers PJ, Leek T. Mucin-based stationary phases as tool for the characterization of drug–mucus interaction. J Chromatogr A 2014; 1351:70-81. [DOI: 10.1016/j.chroma.2014.05.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 04/25/2014] [Accepted: 05/13/2014] [Indexed: 10/25/2022]
|
12
|
de Moraes MC, Vanzolini KL, Cardoso CL, Cass QB. New trends in LC protein ligand screening. J Pharm Biomed Anal 2014; 87:155-66. [DOI: 10.1016/j.jpba.2013.07.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 07/11/2013] [Accepted: 07/12/2013] [Indexed: 10/26/2022]
|
13
|
Bartolini M, Wainer IW, Bertucci C, Andrisano V. The rapid and direct determination of ATPase activity by ion exchange chromatography and the application to the activity of heat shock protein-90. J Pharm Biomed Anal 2013; 73:77-81. [PMID: 22497853 PMCID: PMC3398240 DOI: 10.1016/j.jpba.2012.03.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 03/12/2012] [Indexed: 01/06/2023]
Abstract
Adenosine nucleotides are involved as substrates or co-factors in several biochemical reactions, catalyzed by enzymes, which modulate energy production, signal transduction and cell proliferation. We here report the development and optimization of an ion exchange liquid chromatography (LC) method for the determination of ATP, ADP and AMP. This method is specifically aimed at the determination of the ATP-ase activity of human heat shock protein 90 (Hsp90), a molecular chaperone that has emerged as target enzyme in cancer therapy. Separation of the three nucleotides was achieved in a 15-min run by using a disk shaped monolithic ethylene diamine stationary phase of small dimensions (2mm×6mm i.d.), under a three-solvent gradient elution mode and UV detection at 256nm. The described direct LC method resulted highly specific as a consequence of the baseline separation of the three adenosine nucleotides and could be applied to the determination of the enzymatic activity of ADP/ATP generating or consuming enzymes (such as kinases). Furthermore, comparison of the LOD and LOQ values of the LC method with those obtained with the malachite green assay, which is one of the most used indirect screening methodologies for ATP-ase activity, showed that the LC method has a similar range of application without presenting the drawbacks related to contamination by inorganic phosphate ions and glycerol, which are present in Hsp90 commercial samples.
Collapse
Affiliation(s)
- Manuela Bartolini
- Department of Pharmaceutical Sciences, University of Bologna, via Belmeloro 6, 40126 Bologna, Italy.
| | | | | | | |
Collapse
|
14
|
Haginaka J, Kitabatake T, Hirose I, Matsunaga H, Moaddel R. Interaction of cepharanthine with immobilized heat shock protein 90α (Hsp90α) and screening of Hsp90α inhibitors. Anal Biochem 2012; 434:202-6. [PMID: 23219559 DOI: 10.1016/j.ab.2012.11.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 11/09/2012] [Accepted: 11/09/2012] [Indexed: 12/17/2022]
Abstract
Heat shock protein 90α (Hsp90α) immobilized on aminopropyl silica gels was prepared via the N- or C-terminal, which was termed Hsp90α-NT or Hsp90α-CT, respectively. Binding interactions of biscoclaurine alkaloids (cepharanthine (CEP), berbamine (BBM), isotetrandrine (ITD), and cycleanine (CCN)) with Hsp90α were examined using the Hsp90α-NT or -CT columns by frontal and zonal chromatography studies. The dissociation constants of CEP, BBM, ITD, and CCN to Hsp90α-NT were estimated to be 5.3, 18.6, 46.3, and 159 μM, respectively, by frontal chromatography techniques. Similar results were obtained with the Hsp90α-CT column. These data suggest that these biscoclaurine alkaloids interact with the middle domain of Hsp90α. This was confirmed by demonstrating that CEP competed with endothelial nitric oxide synthase at the middle domain of Hsp90α, where it was shown to have a dissociation constant of 15 nM. Furthermore, the Hsp90α-NT column was applied for preliminary screening of natural Hsp90α inhibitors by zonal chromatography studies.
Collapse
Affiliation(s)
- Jun Haginaka
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, Nishinomiya 663-8179, Japan.
| | | | | | | | | |
Collapse
|
15
|
Sanghvi M, Moaddel R, Wainer IW. The development and characterization of protein-based stationary phases for studying drug-protein and protein-protein interactions. J Chromatogr A 2011; 1218:8791-8. [PMID: 21704318 PMCID: PMC3183392 DOI: 10.1016/j.chroma.2011.05.067] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/28/2011] [Accepted: 05/21/2011] [Indexed: 12/19/2022]
Abstract
Protein-based liquid chromatography stationary phases are used in bioaffinity chromatography for studying drug-protein interactions, the determination of binding affinities, competitive and allosteric interactions, as well as for studying protein-protein interactions. This review addresses the development and characterization of protein-based stationary phase, and the application of these phases using frontal and zonal chromatography techniques. The approach will be illustrated using immobilized heat shock protein 90α and the immobilized estrogen related receptor stationary phases. In addition, the review discusses the use of the protein-coated magnetic beads for ligand and protein fishing as well as for the identification of unknown ligands from cellular or botanical extracts.
Collapse
Affiliation(s)
- Mitesh Sanghvi
- Gerontology Research Center, National institute on Aging, National Institutes of Health, 5600 Nathan Shock Drive, Baltimore, MD 21224, USA
| | - Ruin Moaddel
- Gerontology Research Center, National institute on Aging, National Institutes of Health, 5600 Nathan Shock Drive, Baltimore, MD 21224, USA
| | - Irving W. Wainer
- Gerontology Research Center, National institute on Aging, National Institutes of Health, 5600 Nathan Shock Drive, Baltimore, MD 21224, USA
| |
Collapse
|
16
|
Sanghvi M, Moaddel R, Frazier C, Wainer IW. Synthesis and characterization of liquid chromatographic columns containing the immobilized ligand binding domain of the estrogen related receptor alpha and estrogen related receptor gamma. J Pharm Biomed Anal 2010; 53:777-80. [PMID: 20542653 PMCID: PMC2932438 DOI: 10.1016/j.jpba.2010.05.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 05/13/2010] [Accepted: 05/15/2010] [Indexed: 11/18/2022]
Abstract
The ligand binding domains of the estrogen related receptors, ERRalpha and ERRgamma were covalently immobilized onto the surface of an aminopropyl silica liquid chromatography stationary phase to create the ERRalpha-silica and ERRgamma-silica columns and onto the surface of open tubular capillaries to create the ERRalpha-OT and ERRgamma-OT columns. The ERR-silica and ERR-OT columns were characterized using frontal chromatographic techniques with diethylstibesterol and the binding affinities, K(d) values, to the immobilized receptors were consistent with the values obtained by a radioligand binding assay. The ERRgamma-silica column was also characterized using non-linear chromatographic techniques using a series of tamoxifen derivatives. The relative K(d) values obtained for the derivatives were consistent with the relative ability of the compounds to inhibit the cellular proliferation of the human-derived T98G glioma cell line, expressed as IC(50) values. The results indicate that the columns containing immobilized ERRalpha and ERRgamma can be created and used to characterize the binding of compounds to the immobilized receptors and that the relative retention of compounds on these columns reflects the magnitude of their inhibitory activity.
Collapse
Affiliation(s)
- M Sanghvi
- Gerontology Research Center, National Institute on Aging, National Institutes of Health, 5600 Nathan Shock Drive, Baltimore, MD 21224-6825, USA
| | | | | | | |
Collapse
|
17
|
Mancini F, Andrisano V. Development of a liquid chromatographic system with fluorescent detection for β-secretase immobilized enzyme reactor on-line enzymatic studies. J Pharm Biomed Anal 2010; 52:355-61. [DOI: 10.1016/j.jpba.2009.07.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 07/04/2009] [Accepted: 07/09/2009] [Indexed: 11/24/2022]
|
18
|
Schiel JE, Hage DS. Kinetic studies of biological interactions by affinity chromatography. J Sep Sci 2009; 32:1507-22. [PMID: 19391173 DOI: 10.1002/jssc.200800685] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The rates at which biological interactions occur can provide important information on the mechanism and behavior of such processes in living systems. This paper will discuss how affinity chromatography can be used as a tool to examine the kinetics of biological interactions. This approach, referred to here as biointeraction chromatography, uses a column with an immobilized binding agent to examine the association or dissociation of this agent with other compounds. The use of HPLC-based affinity columns in kinetic studies has received particular attention in recent years. Advantages of using HPLC with affinity chromatography for this purpose include the ability to reuse the same ligand within a column for a large number of experiments, and the good precision and accuracy of this approach. A number of techniques are available for kinetic studies through the use of affinity columns and biointeraction chromatography. These approaches include plate height measurements, peak profiling, peak fitting, split-peak measurements, and peak decay analysis. The general principles for each of these methods are discussed in this paper and some recent applications of these techniques are presented. The advantages and potential limitations of each approach are also considered.
Collapse
Affiliation(s)
- John E Schiel
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588-0304, USA
| | | |
Collapse
|
19
|
Calleri E, Temporini C, Caccialanza G, Massolini G. Target-Based Drug Discovery: the Emerging Success of Frontal Affinity Chromatography Coupled to Mass Spectrometry. ChemMedChem 2009; 4:905-16. [DOI: 10.1002/cmdc.200800436] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
20
|
Schiel JE, Ohnmacht CM, Hage DS. Measurement of drug-protein dissociation rates by high-performance affinity chromatography and peak profiling. Anal Chem 2009; 81:4320-33. [PMID: 19422253 PMCID: PMC3443976 DOI: 10.1021/ac9000404] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rate at which a drug or other small solute interacts with a protein is important in understanding the biological and pharmacokinetic behavior of these agents. One approach that has been developed for examining these rates involves the use of high-performance affinity chromatography (HPAC) and estimates of band-broadening through peak profiling. Previous work with this method has been based on a comparison of the statistical moments for a retained analyte versus nonretained species at a single, high flow rate to obtain information on stationary phase mass transfer. In this study an alternative approach was created that allows a broad range of flow rates to be used for examining solute-protein dissociation rates. Chromatographic theory was employed to derive equations that could be used with this approach on a single column, as well as with multiple columns to evaluate and correct for the impact of stagnant mobile phase mass transfer. The interaction of L-tryptophan with human serum albumin was used as a model system to test this method. A dissociation rate constant of 2.7 (+/-0.2) s(-1) was obtained by this approach at pH 7.4 and 37 degrees C, which was in good agreement with previous values determined by other methods. The techniques described in this report can be applied to other biomolecular systems and should be valuable for the determination of drug-protein dissociation rates.
Collapse
Affiliation(s)
- John E Schiel
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, USA
| | | | | |
Collapse
|
21
|
Marszałł MP, Moaddel R, Kole S, Gandhari M, Bernier M, Wainer IW. Ligand and protein fishing with heat shock protein 90 coated magnetic beads. Anal Chem 2008; 80:7571-5. [PMID: 18693748 DOI: 10.1021/ac801153h] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Heat shock protein 90alpha (Hsp90alpha) is a molecular chaperone that has been targeted for the development of new anticancer therapies. To date, co-immunoprecipitation (IP) has been primarily used to identify novel client proteins. We now report an alternative approach in which Hsp90alpha has been immobilized onto the surface of silica-based magnetic beads. The beads were used to isolate known Hsp90alpha ligands from a mixture containing ligands and nonligands. In addition, they were also used to isolated proteins from a mixture of proteins, as well as a cellular extract. The results indicate that the Hsp90alpha coated magnetic beads can be used to "fish" from complex chemical and biological mixtures for new lead drug candidates and client proteins.
Collapse
Affiliation(s)
- M P Marszałł
- Gerontology Research Center, National Institute on Aging/NIH, Baltimore, Maryland 21224, USA
| | | | | | | | | | | |
Collapse
|