1
|
Begum S, Shareef MZ, Bharathi K. Part-II- in silico drug design: application and success. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2018-0160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In silico tools have indeed reframed the steps involved in traditional drug discovery and development process and the term in silico has become a familiar term in pharmaceutical sector like the terms in vitro and in vivo. The successful design of HIV protease inhibitors, Saquinavir, Indinavir and other important medicinal agents, initiated interest of researchers in structure based drug design approaches (SBDD). The interactions between biomolecules and a ligand, binding energy, free energy and stability of biomolecule-ligand complex can be envisioned and predicted by applying molecular docking studies. Protein-ligand, protein-protein, DNA-ligand interactions etc. aid in elucidating molecular level mechanisms of drug molecules. In the Ligand based drug design (LBDD) approaches, QSAR studies have tremendously contributed to the development of antimicrobial, anticancer, antimalarial agents. In the recent years, multiQSAR (mt-QSAR) approaches have been successfully employed for designing drugs against multifactorial diseases. Output of a research in several instances is rewarding when both SBDD and LBDD approaches are combined. Application of in silico studies for prediction of pharmacokinetics was once a real challenge but one can see unlimited number publications comprising tools, data bases which can accurately predict almost all the pharmacokinetic parameters. Absorption, distribution, metabolism, transporters, blood brain barrier permeability, hERG toxicity, P-gp affinity and several toxicological end points can be accurately predicted for a candidate molecule before its synthesis. In silico approaches are greatly encouraged a result of growing limitations and new legislations related to the animal use for research. The combined use of in vitro data and in silico tools will definitely decrease the use of animal testing in the future.In this chapter, in silico approaches and their applications are reviewed and discussed giving suitable examples.
Collapse
Affiliation(s)
- Shaheen Begum
- Institute of Pharmaceutical Technology , Sri Padmavati Mahila Visvavidyalayam , 517501 Tirupati , Andhra Pradesh , India
| | - Mohammad Zubair Shareef
- Institute of Pharmaceutical Technology , Sri Padmavati Mahila Visvavidyalayam , 517501 Tirupati , Andhra Pradesh , India
| | - Koganti Bharathi
- Institute of Pharmaceutical Technology , Sri Padmavati Mahila Visvavidyalayam , 517501 Tirupati , Andhra Pradesh , India
| |
Collapse
|
2
|
Tsopelas F, Giaginis C, Tsantili-Kakoulidou A. Lipophilicity and biomimetic properties to support drug discovery. Expert Opin Drug Discov 2017. [PMID: 28644732 DOI: 10.1080/17460441.2017.1344210] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Lipophilicity, expressed as the octanol-water partition coefficient, constitutes the most important property in drug action, influencing both pharmacokinetic and pharmacodynamics processes as well as drug toxicity. On the other hand, biomimetic properties defined as the retention outcome on HPLC columns containing a biological relevant agent, provide a considerable advance for rapid experimental - based estimation of ADME properties in early drug discovery stages. Areas covered: This review highlights the paramount importance of lipophilicity in almost all aspects of drug action and safety. It outlines problems brought about by high lipophilicity and provides an overview of the drug-like metrics which incorporate lower limits or ranges of logP. The fundamental factors governing lipophilicity are compared to those involved in phospholipophilicity, assessed by Immobilized Artificial Membrane Chromatography (IAM). Finally, the contribution of biomimetic properties to assess plasma protein binding is evaluated. Expert opinion: Lipophilicity and biomimetic properties have important distinct and overlapping roles in supporting the drug discovery process. Lipophilicity is unique in early drug design for library screening and for the identification of the most promising compounds to start with, while biomimetic properties are useful for the experimentally-based evaluation of ADME properties for the synthesized novel compounds, supporting the prioritization of drug candidates and guiding further synthesis.
Collapse
Affiliation(s)
- Fotios Tsopelas
- a Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering , National Technical University of Athens , Athens , Greece
| | - Constantinos Giaginis
- b Department of Food Science and Nutrition , School of Environment, University of the Aegean , Myrina , Lemnos , Greece
| | - Anna Tsantili-Kakoulidou
- c Department of Pharmaceutical Chemistry, Faculty of Pharmacy , National and Kapodistrian University of Athens , Athens , Greece
| |
Collapse
|
3
|
Lambrinidis G, Vallianatou T, Tsantili-Kakoulidou A. In vitro, in silico and integrated strategies for the estimation of plasma protein binding. A review. Adv Drug Deliv Rev 2015; 86:27-45. [PMID: 25819487 DOI: 10.1016/j.addr.2015.03.011] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 02/11/2015] [Accepted: 03/20/2015] [Indexed: 12/28/2022]
Abstract
Plasma protein binding (PPB) strongly affects drug distribution and pharmacokinetic behavior with consequences in overall pharmacological action. Extended plasma protein binding may be associated with drug safety issues and several adverse effects, like low clearance, low brain penetration, drug-drug interactions, loss of efficacy, while influencing the fate of enantiomers and diastereoisomers by stereoselective binding within the body. Therefore in holistic drug design approaches, where ADME(T) properties are considered in parallel with target affinity, considerable efforts are focused in early estimation of PPB mainly in regard to human serum albumin (HSA), which is the most abundant and most important plasma protein. The second critical serum protein α1-acid glycoprotein (AGP), although often underscored, plays also an important and complicated role in clinical therapy and thus the last years it has been studied thoroughly too. In the present review, after an overview of the principles of HSA and AGP binding as well as the structure topology of the proteins, the current trends and perspectives in the field of PPB predictions are presented and discussed considering both HSA and AGP binding. Since however for the latter protein systematic studies have started only the last years, the review focuses mainly to HSA. One part of the review highlights the challenge to develop rapid techniques for HSA and AGP binding simulation and their performance in assessment of PPB. The second part focuses on in silico approaches to predict HSA and AGP binding, analyzing and evaluating structure-based and ligand-based methods, as well as combination of both methods in the aim to exploit the different information and overcome the limitations of each individual approach. Ligand-based methods use the Quantitative Structure-Activity Relationships (QSAR) methodology to establish quantitate models for the prediction of binding constants from molecular descriptors, while they provide only indirect information on binding mechanism. Efforts for the establishment of global models, automated workflows and web-based platforms for PPB predictions are presented and discussed. Structure-based methods relying on the crystal structures of drug-protein complexes provide detailed information on the underlying mechanism but are usually restricted to specific compounds. They are useful to identify the specific binding site while they may be important in investigating drug-drug interactions, related to PPB. Moreover, chemometrics or structure-based modeling may be supported by experimental data a promising integrated alternative strategy for ADME(T) properties optimization. In the case of PPB the use of molecular modeling combined with bioanalytical techniques is frequently used for the investigation of AGP binding.
Collapse
|
4
|
Zheng X, Li Z, Beeram S, Podariu M, Matsuda R, Pfaunmiller EL, White CJ, Carter N, Hage DS. Analysis of biomolecular interactions using affinity microcolumns: a review. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 968:49-63. [PMID: 24572459 PMCID: PMC4112177 DOI: 10.1016/j.jchromb.2014.01.026] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 01/16/2014] [Accepted: 01/19/2014] [Indexed: 12/15/2022]
Abstract
Affinity chromatography has become an important tool for characterizing biomolecular interactions. The use of affinity microcolumns, which contain immobilized binding agents and have volumes in the mid-to-low microliter range, has received particular attention in recent years. Potential advantages of affinity microcolumns include the many analysis and detection formats that can be used with these columns, as well as the need for only small amounts of supports and immobilized binding agents. This review examines how affinity microcolumns have been used to examine biomolecular interactions. Both capillary-based microcolumns and short microcolumns are considered. The use of affinity microcolumns with zonal elution and frontal analysis methods are discussed. The techniques of peak decay analysis, ultrafast affinity extraction, split-peak analysis, and band-broadening studies are also explored. The principles of these methods are examined and various applications are provided to illustrate the use of these methods with affinity microcolumns. It is shown how these techniques can be utilized to provide information on the binding strength and kinetics of an interaction, as well as on the number and types of binding sites. It is further demonstrated how information on competition or displacement effects can be obtained by these methods.
Collapse
Affiliation(s)
- Xiwei Zheng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Zhao Li
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Sandya Beeram
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Maria Podariu
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Ryan Matsuda
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Erika L Pfaunmiller
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Christopher J White
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - NaTasha Carter
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA.
| |
Collapse
|
5
|
Sievers-Engler A, Lindner W, Lämmerhofer M. Ligand–receptor binding increments in enantioselective liquid chromatography. J Chromatogr A 2014; 1363:79-88. [DOI: 10.1016/j.chroma.2014.04.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/15/2014] [Accepted: 04/20/2014] [Indexed: 10/25/2022]
|
6
|
Matsuda R, Bi C, Anguizola J, Sobansky M, Rodriguez E, Vargas Badilla J, Zheng X, Hage B, Hage DS. Studies of metabolite-protein interactions: a review. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 966:48-58. [PMID: 24321277 PMCID: PMC4032809 DOI: 10.1016/j.jchromb.2013.11.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 11/14/2013] [Accepted: 11/18/2013] [Indexed: 11/25/2022]
Abstract
The study of metabolomics can provide valuable information about biochemical pathways and processes at the molecular level. There have been many reports that have examined the structure, identity and concentrations of metabolites in biological systems. However, the binding of metabolites with proteins is also of growing interest. This review examines past reports that have looked at the binding of various types of metabolites with proteins. An overview of the techniques that have been used to characterize and study metabolite-protein binding is first provided. This is followed by examples of studies that have investigated the binding of hormones, fatty acids, drugs or other xenobiotics, and their metabolites with transport proteins and receptors. These examples include reports that have considered the structure of the resulting solute-protein complexes, the nature of the binding sites, the strength of these interactions, the variations in these interactions with solute structure, and the kinetics of these reactions. The possible effects of metabolic diseases on these processes, including the impact of alterations in the structure and function of proteins, are also considered.
Collapse
Affiliation(s)
- Ryan Matsuda
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Cong Bi
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Jeanethe Anguizola
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Matthew Sobansky
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Elliott Rodriguez
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - John Vargas Badilla
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Xiwei Zheng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Benjamin Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA.
| |
Collapse
|
7
|
Hall ML, Jorgensen WL, Whitehead L. Automated Ligand- and Structure-Based Protocol for in Silico Prediction of Human Serum Albumin Binding. J Chem Inf Model 2013; 53:907-22. [DOI: 10.1021/ci3006098] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michelle Lynn Hall
- Novartis Institutes for Biomedical Research, 100 Technology Square, Cambridge,
Massachusetts 02143, United States
| | - William L. Jorgensen
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Lewis Whitehead
- Novartis Institutes for Biomedical Research, 100 Technology Square, Cambridge,
Massachusetts 02143, United States
| |
Collapse
|
8
|
Vallianatou T, Lambrinidis G, Tsantili-Kakoulidou A. In silicoprediction of human serum albumin binding for drug leads. Expert Opin Drug Discov 2013; 8:583-95. [DOI: 10.1517/17460441.2013.777424] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
9
|
Abou-Zied OK, Al-Lawatia N, Elstner M, Steinbrecher TB. Binding of Hydroxyquinoline Probes to Human Serum Albumin: Combining Molecular Modeling and Förster’s Resonance Energy Transfer Spectroscopy to Understand Flexible Ligand Binding. J Phys Chem B 2013; 117:1062-74. [DOI: 10.1021/jp311238n] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Osama K. Abou-Zied
- Department of Chemistry, Faculty
of Science, Sultan Qaboos University, P.O.
Box 36, Postal Code 123, Muscat, Sultanate of Oman
| | - Najla Al-Lawatia
- Department of Chemistry, Faculty
of Science, Sultan Qaboos University, P.O.
Box 36, Postal Code 123, Muscat, Sultanate of Oman
| | - Marcus Elstner
- Department for Theoretical Chemical
Biology, Institute for Physical Chemistry, Kaiserstr. 12, Karlsruhe Institute of Technology, 76131 Karlsruhe,
Germany
| | - Thomas B. Steinbrecher
- Department for Theoretical Chemical
Biology, Institute for Physical Chemistry, Kaiserstr. 12, Karlsruhe Institute of Technology, 76131 Karlsruhe,
Germany
| |
Collapse
|
10
|
Zsila F, Bikadi Z, Malik D, Hari P, Pechan I, Berces A, Hazai E. Evaluation of drug-human serum albumin binding interactions with support vector machine aided online automated docking. ACTA ACUST UNITED AC 2011; 27:1806-13. [PMID: 21593135 DOI: 10.1093/bioinformatics/btr284] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
MOTIVATION Human serum albumin (HSA), the most abundant plasma protein is well known for its extraordinary binding capacity for both endogenous and exogenous substances, including a wide range of drugs. Interaction with the two principal binding sites of HSA in subdomain IIA (site 1) and in subdomain IIIA (site 2) controls the free, active concentration of a drug, provides a reservoir for a long duration of action and ultimately affects the ADME (absorption, distribution, metabolism, and excretion) profile. Due to the continuous demand to investigate HSA binding properties of novel drugs, drug candidates and drug-like compounds, a support vector machine (SVM) model was developed that efficiently predicts albumin binding. Our SVM model was integrated to a free, web-based prediction platform (http://albumin.althotas.com). Automated molecular docking calculations for prediction of complex geometry are also integrated into the web service. The platform enables the users (i) to predict if albumin binds the query ligand, (ii) to determine the probable ligand binding site (site 1 or site 2), (iii) to select the albumin X-ray structure which is complexed with the most similar ligand and (iv) to calculate complex geometry using molecular docking calculations. Our SVM model and the potential offered by the combined use of in silico calculation methods and experimental binding data is illustrated.
Collapse
Affiliation(s)
- Ferenc Zsila
- Department of Molecular Pharmacology, Institute of Biomolecular Chemistry, Chemical Research Center, H-1025 Budapest, Pusztaszeri út 59-67., Hungary
| | | | | | | | | | | | | |
Collapse
|
11
|
Retention of structurally diverse drugs in human serum albumin chromatography and its potential to simulate plasma protein binding. J Chromatogr A 2010; 1217:5761-8. [DOI: 10.1016/j.chroma.2010.07.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Revised: 07/07/2010] [Accepted: 07/10/2010] [Indexed: 11/21/2022]
|
12
|
Lämmerhofer M. Chiral recognition by enantioselective liquid chromatography: mechanisms and modern chiral stationary phases. J Chromatogr A 2009; 1217:814-56. [PMID: 19906381 DOI: 10.1016/j.chroma.2009.10.022] [Citation(s) in RCA: 516] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 09/30/2009] [Accepted: 10/07/2009] [Indexed: 11/19/2022]
Abstract
An overview of the state-of-the-art in LC enantiomer separation is presented. This tutorial review is mainly focused on mechanisms of chiral recognition and enantiomer distinction of popular chiral selectors and corresponding chiral stationary phases including discussions of thermodynamics, additivity principle of binding increments, site-selective thermodynamics, extrathermodynamic approaches, methods employed for the investigation of dominating intermolecular interactions and complex structures such as spectroscopic methods (IR, NMR), X-ray diffraction and computational methods. Modern chiral stationary phases are discussed with particular focus on those that are commercially available and broadly used. It is attempted to provide the reader with vivid images of molecular recognition mechanisms of selected chiral selector-selectand pairs on basis of solid-state X-ray crystal structures and simulated computer models, respectively. Such snapshot images illustrated in this communication unfortunately cannot account for the molecular dynamics of the real world, but are supposed to be helpful for the understanding. The exploding number of papers about applications of various chiral stationary phases in numerous fields of enantiomer separations is not covered systematically.
Collapse
Affiliation(s)
- Michael Lämmerhofer
- Christian Doppler Laboratory for Molecular Recognition Materials, Department of Analytical Chemistry and Food Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria.
| |
Collapse
|
13
|
Affiliation(s)
- Stefan Balaz
- Department of Pharmaceutical Sciences, College of Pharmacy, North Dakota State University, Fargo, North Dakota 58105, USA.
| |
Collapse
|
14
|
Del Rio A. Exploring enantioselective molecular recognition mechanisms with chemoinformatic techniques. J Sep Sci 2009; 32:1566-84. [DOI: 10.1002/jssc.200800693] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
15
|
Abstract
Molecular recognition of different enantiomers of a drug has become of increasing importance in the last decade due to the racemic switch strategy adapted by the pharmaceutical industry. Different analytical techniques to carry out enantioselective analysis of chiral compounds have been suggested in the literature. In the following, a brief overview of different techniques used for enantioselective analysis is given. Challenging aspects of these techniques, such as the quality of analytical information received from each technique, advantages, and disadvantages are discussed. Alternatives (enantioselective membranes, amperometric biosensors, molecularly imprinted polymers (MIPs)), capable of meeting the requirements of industrial processes, in terms of productivity, cost-effectiveness, and environmental issues are critically reviewed.
Collapse
Affiliation(s)
- Emad L Izake
- Forensic Chemistry Section, Pathology and Scientific Services, Queensland Health, Queensland Government, Australia.
| |
Collapse
|
16
|
Fox SB, Culha M, Sepaniak MJ. DEVELOPMENT OF A GRID SEARCH MOLECULAR MECHANICS MODELING STRATEGY TO STUDY ELUTION BEHAVIOR IN CYCLODEXTRIN MODIFIED CAPILLARY ELECTROPHORESIS. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100103443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Shannon B. Fox
- a Department of Chemistry , University of Tennessee , Knoxville, TN, 37996-1600, U.S.A
| | - Mustafa Culha
- a Department of Chemistry , University of Tennessee , Knoxville, TN, 37996-1600, U.S.A
| | - Michael J. Sepaniak
- b Department of Chemistry , University of Tennessee , Knoxville, TN, 37996-1600, U.S.A
| |
Collapse
|
17
|
Lämmerhofer M, Franco P, Lindner W. Quinine carbamate chiral stationary phases: Systematic optimization of steric selector-selectand binding increments and enantioselectivity by quantitative structure-enantioselectivity relationship studies. J Sep Sci 2006; 29:1486-96. [PMID: 16894794 DOI: 10.1002/jssc.200600111] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A series of quinine carbamate-based chiral stationary phases (CSPs) differing solely in the carbamate residue have been devised and a congeneric set of N-3,5-dinitrobenzoyl (DNB) amino acids (AAs) was separated into enantiomers on these CSPs by HPLC using a buffered hydro-organic mobile phase. Some details on retention and chiral recognition mechanisms have been investigated by application of quantitative structure-property relationship (QSPR) studies using the linear free energy relationship methodology, i.e., the extrathermodynamic approach. Retention factors of the high affinity enantiomer (log k2) and enantioselectivities (log alpha) were correlated with Taft's steric parameter as structural descriptor for the variability in the carbamate and AA residues, and statistically significant QSPR models could be obtained. They confirmed that the variance in the dependent variable (log k2, log alpha) is mainly associated with the steric bulkiness of the selectors' carbamate and of the AA residues. The retention factor of the second eluted enantiomers and the enantioselectivity first increased with steric bulkiness of the carbamate and AA residues, which may be explained by stronger dispersive interactions. After reaching an optimum, the dependent variable, however, declined with further increase of the steric bulkiness of the substituents, probably because of steric hindrance. The variability of the retention factors of the first eluted enantiomer could not be explained by steric descriptors. Instead, it has become obvious that the retention arises mainly from interactions of the DNB-AA and the quinine carbamate backbone, as it turned out to be more or less constant and solely to a minute amount modulated by the carbamate residue and the AA side chain. The QSPR models were fully in agreement with an earlier postulated chromatographically and spectroscopically derived hypothetical selector-selectand binding model.
Collapse
Affiliation(s)
- Michael Lämmerhofer
- Christian Doppler Laboratory for Molecular Recognition Materials, Department of Analytical Chemistry, University of Vienna, Vienna, Austria.
| | | | | |
Collapse
|
18
|
Gunturi SB, Narayanan R, Khandelwal A. In silico ADME modelling 2: Computational models to predict human serum albumin binding affinity using ant colony systems. Bioorg Med Chem 2006; 14:4118-29. [PMID: 16504519 DOI: 10.1016/j.bmc.2006.02.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2005] [Revised: 01/31/2006] [Accepted: 02/01/2006] [Indexed: 11/23/2022]
Abstract
Modelling of in vitro human serum albumin (HSA) binding data of 94 diverse drugs and drug-like compounds is performed to develop global predictive models that are applicable to the whole medicinal chemistry space. For this aim, ant colony systems, a stochastic method along with multiple linear regression (MLR), is employed to exhaustively search and select multivariate linear equations, from a pool of 327 molecular descriptors. This methodology helped us to derive optimal quantitative structure-property relationship (QSPR) models based on five and six descriptors with excellent predictive power. The best five-descriptor model is based on Kier and Hall valence connectivity index--Order 5 (path), Auto-correlation descriptor (Broto-Moreau) weighted by atomic masses--Order 4, Auto-correlation descriptor (Broto-Moreau) weighted by atomic polarizabilities--Order 5, AlogP98, SklogS (calculated buffer water solubility) [R=0.8942, Q=0.86790, F=62.24 and SE=0.2626]; the best six-variable model is based on Kier and Hall valence connectivity index of Order 3 (cluster), Auto-correlation descriptor (Broto-Moreau) weighted by atomic masses--Order 4, Auto-correlation descriptor (Broto-Moreau) weighted by atomic polarizabilities--Order 5, Atomic-Level-Based AI topological descriptors--AIdsCH, AlogP98, SklogS (calculated buffer water solubility) [R=0.9128, Q=0.89220, F=64.09 and SE=0.2411]. From the analysis of the physical meaning of the selected descriptors, it is inferred that the binding affinity of small organic compounds to human serum albumin is principally dependent on the following fundamental properties: (1) hydrophobic interactions, (2) solubility, (3) size and (4) shape. Finally, as the models reported herein are based on computed properties, they appear to be a valuable tool in virtual screening, where selection and prioritisation of candidates is required.
Collapse
Affiliation(s)
- Sitarama B Gunturi
- Life Sciences R&D Division, Advanced Technology Centre, Tata Consultancy Services Limited, # 1, Software Units Layout, Madhapur, Hyderabad 500 081, India
| | | | | |
Collapse
|
19
|
Millot MC. Separation of drug enantiomers by liquid chromatography and capillary electrophoresis, using immobilized proteins as chiral selectors. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 797:131-59. [PMID: 14630147 DOI: 10.1016/j.jchromb.2003.08.035] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Proteins display interesting chiral discrimination properties owing to multiple possibilities of intermolecular interactions with chiral compounds. This review deals with proteins which have been used as immobilized chiral selectors for the enantioseparation of drugs in liquid chromatography and capillary electrophoresis. The main procedures allowing the immobilization of proteins onto matrices, such as silica and zirconia particles, membranes and capillaries are first presented. Then the factors affecting the enantioseparation of drugs in liquid chromatography, using various protein-based chiral stationary phases (CSPs), are reviewed and discussed. Last, chiral separations already achieved using immobilized protein selectors in affinity capillary electrochromatography (ACEC) are presented and compared in terms of efficiency, stability and reproducibility.
Collapse
Affiliation(s)
- M C Millot
- Laboratoire de Recherche sur les Polymères, CNRS-Université Paris 12, UMR 7581, 2 à 8 rue Henri Dunant, Thiais 94320, France.
| |
Collapse
|
20
|
Valko K, Nunhuck S, Bevan C, Abraham MH, Reynolds DP. Fast Gradient HPLC Method to Determine Compounds Binding to Human Serum Albumin. Relationships with Octanol/Water and Immobilized Artificial Membrane Lipophilicity. J Pharm Sci 2003; 92:2236-48. [PMID: 14603509 DOI: 10.1002/jps.10494] [Citation(s) in RCA: 231] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A fast gradient HPLC method (cycle time 15 min) has been developed to determine Human Serum Albumin (HSA) binding of discovery compounds using chemically bonded protein stationary phases. The HSA binding values were derived from the gradient retention times that were converted to the logarithm of the equilibrium constants (logK HSA) using data from a calibration set of molecules. The method has been validated using literature plasma protein binding data of 68 known drug molecules. The method is fully automated, and has been used for lead optimization in more than 20 company projects. The HSA binding data obtained for more than 4000 compounds were suitable to set up global and project specific quantitative structure binding relationships that helped compound design in early drug discovery. The obtained HSA binding of known drug molecules were compared to the Immobilized Artificial Membrane binding data (CHI IAM) obtained by our previously described HPLC-based method. The solvation equation approach has been used to characterize the normal binding ability of HSA, and this relationship shows that compound lipophilicity is a significant factor. It was found that the selectivity of the "baseline" lipophilicity governing HSA binding, membrane interaction, and octanol/water partition are very similar. However, the effect of the presence of positive or negative charges have very different effects. It was found that negatively charged compounds bind more strongly to HSA than it would be expected from the lipophilicity of the ionized species at pH 7.4. Several compounds showed stronger HSA binding than can be expected from their lipophilicity alone, and comparison between predicted and experimental binding affinity allows the identification of compounds that have good complementarities with any of the known binding sites.
Collapse
Affiliation(s)
- Klara Valko
- Computational, Analytical and Structural Sciences, GlaxoSmithKline, Gunnels Wood Road Stevenage, Herts. SG1 2NY United Kingdom.
| | | | | | | | | |
Collapse
|
21
|
Abstract
Drug binding to Human Serum Albumin (HSA) is an area of intense research. The pharmacokinetics and pharmacodynamics of drugs are strongly affected by their binding to this protein. In this article, the field is reviewed, as well as our models to predict drug-binding affinities to HSA from drug structure. The physiological role of HSA is described, as well as its influence in drug action. The crystal structures of this protein are discussed, emphasizing the two drug-binding sites and the fatty acids binding sites observed therein. The advantages of using high-performance affinity chromatography to rapidly screen drugs for HSA binding are explained. The different QSAR models for HSA binding of restricted families of drugs (both from other groups and our group) are enumerated. Finally, a detailed description of our general models to predict drug-binding strengths to HSA from structure is given. It is expected for these models to be useful in drug design and pharmaceutical research.
Collapse
Affiliation(s)
- Gonzalo Colmenarejo
- Department of Cheminformatics, GlaxoSmithKline, Centro de Investigación Básica, Parque Tecnológico de Madrid, E-28760 Madrid, Spain.
| |
Collapse
|
22
|
Riboflavin binding protein—Chiral stationary phase: Investigation of retention mechanism. Chromatographia 2002. [DOI: 10.1007/bf02491778] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
23
|
Aires-de-Sousa J, Gasteiger J. Prediction of enantiomeric selectivity in chromatography. Application of conformation-dependent and conformation-independent descriptors of molecular chirality. J Mol Graph Model 2002; 20:373-88. [PMID: 11885960 DOI: 10.1016/s1093-3263(01)00136-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In order to process molecular chirality by computational methods and to obtain predictions for properties that are influenced by chirality, a fixed-length conformation-dependent chirality code is introduced. The code consists of a set of molecular descriptors representing the chirality of a 3D molecular structure. It includes information about molecular geometry and atomic properties, and can distinguish between enantiomers, even if chirality does not result from chiral centers. The new molecular transform was applied to two datasets of chiral compounds, each of them containing pairs of enantiomers that had been separated by chiral chromatography. The elution order within each pair of isomers was predicted by means of Kohonen neural networks (NN) using the chirality codes as input. A previously described conformation-independent chirality code was also applied and the results were compared. In both applications clustering of the two classes of enantiomers (first eluted and last eluted enantiomers) could be successfully achieved by NN and accurate predictions could be obtained for independent test sets. The chirality code described here has a potential for a broad range of applications from stereoselective reactions to analytical chemistry and to the study of biological activity of chiral compounds.
Collapse
Affiliation(s)
- João Aires-de-Sousa
- Departamento de Química, CQFB and SINTOR-UNINOVA, Campus Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Monte de Caparica, Portugal
| | | |
Collapse
|
24
|
Andrisano V, Gotti R, Recanatini M, Cavalli A, Varoli L, Bertucci C. Stereoselective binding of 2-(4-biphenylyl)-3-substituted-3-hydroxypropionic acids on an immobilised human serum albumin chiral stationary phase. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 768:137-45. [PMID: 11939547 DOI: 10.1016/s0378-4347(01)00493-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A series of 2-(4-biphenylyl)-3,3'-hydroxy-substituted phenyl propionic acid, with anti-inflammatory properties, bearing two chiral centres, were studied by HPLC upon HSA-CSP (human serum albumin-based chiral stationary phase). The compounds were analysed in their stereoisomeric erythro and threo forms. The study involved the enantioselective analysis on HSA-CSP, the determination of the racemate lipophilicity (log k'(w)), a QSRR (quantitative structure-retention relationship) analysis and CD study for the assessment of the absolute configuration of the most retained enantiomer. Lipophilicity was found to be an important factor affecting the affinity of the compounds for the HSA stationary phase, but electronic properties seemed to play a role. The position of the substituent of the phenyl group on carbon 3 was found important to modulate stereoselective interaction, the highest value of enantioselectivities being found for the erythro ortho-substituted phenyl derivatives. The previously proposed two steps mechanism of enantiodiscrimination for cyclohexylphenyl substituted derivatives was confirmed for this series of derivatives bearing the biphenylyl moiety.
Collapse
Affiliation(s)
- V Andrisano
- Dipartimento di Science Farmaceutiche, Bologna, Italy.
| | | | | | | | | | | |
Collapse
|
25
|
Colmenarejo G, Alvarez-Pedraglio A, Lavandera JL. Cheminformatic models to predict binding affinities to human serum albumin. J Med Chem 2001; 44:4370-8. [PMID: 11728183 DOI: 10.1021/jm010960b] [Citation(s) in RCA: 184] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Models to predict binding affinities to human serum albumin (HSA) should be very useful in the pharmaceutical industry to speed up the design of new compounds, especially as far as pharmacokinetics is concerned. We have experimentally determined through high-performance affinity chromatography the binding affinities to HSA of 95 diverse drugs and druglike compounds. These data have allowed us the derivation of quantitative structure-activity relationship models to predict binding affinities to HSA of new compounds on the basis of their structure. Simple linear, one-variable models have been derived for specific families of compounds (r(2) > or = 0.80; q(2) > or = 0.62): beta-adrenergic antagonists, steroids, COX inhibitors, and tricyclic antidepressants. Also, global models have been derived to be applicable to the whole medicinal chemical space by using the full database of HSA binding constants described above. For this aim, a genetic algorithm has been used to exhaustively search and select for multivariate and nonlinear equations, starting from a large pool of molecular descriptors. The resulting models display good fits to the experimental data (r(2) > or = 0.78; LOF < or = 0.12). In addition, both internal (cross validation and randomization) and external validation tests have demonstrated that these models have good predictive power (q(2) > or = 0.73; PRESS/SSY < or = 0.23; r(2) > or = 0.82 for the external set). Statistical analysis of the equation populations indicates that hydrophobicity (as measured by the ClogP) is the most important variable determining the binding extent to HSA. In addition, structural factors (especially the topological (6)chi(ring) index and some Jurs descriptors) also frequently appear as descriptors in the best equations. Therefore, binding to HSA turns out to be determined by a combination of hydrophobic forces together with some modulating shape factors. This agrees with X-ray structures of HSA alone or bound to ligands, where the binding pockets of both sites I and II are composed mainly of hydrophobic residues.
Collapse
Affiliation(s)
- G Colmenarejo
- Structural Chemistry Department, GlaxoSmithKline, Parque Tecnológico de Madrid, E-28760 Tres Cantos, Madrid, Spain
| | | | | |
Collapse
|
26
|
Suzuki T, Timofei S, Iuoras BE, Uray G, Verdino P, Fabian WM. Quantitative structure-enantioselective retention relationships for chromatographic separation of arylalkylcarbinols on Pirkle type chiral stationary phases. J Chromatogr A 2001; 922:13-23. [PMID: 11486858 DOI: 10.1016/s0021-9673(01)00921-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Quantitative structure-retention (QSRR, retention factors log k1 and log k2 for the first and second eluted enantiomer) as well as enantioselective retention relationships (QSERR, separation factor log a) for a series of 42 chiral arylalkylcarbinols on four brush-type chiral stationary phases are derived by multiple linear regression analyses and artificial neuronal network calculations using 2D and 3D molecular descriptors including those obtained by quantum chemical calculations. Separation factors are in addition modeled by the 3D-QSAR method of comparative molecular field analysis (CoMFA). For the retention factors the LUMO energy turns out to be the most important descriptor, whereas for log a it is the hydrophobicity of the analytes. With CoMFA both the steric and electrostatic field are found to be of almost comparable significance.
Collapse
Affiliation(s)
- T Suzuki
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Japan
| | | | | | | | | | | |
Collapse
|
27
|
Modulation of chromatographic performances of HSA-based HPLC column by reversible binding of lithocholic acid. Chromatographia 2001. [DOI: 10.1007/bf02491614] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
28
|
Wolbach JP, Lloyd DK, Wainer IW. Approaches to quantitative structure–enantioselectivity relationship modeling of chiral separations using capillary electrophoresis. J Chromatogr A 2001; 914:299-314. [PMID: 11358225 DOI: 10.1016/s0021-9673(01)00580-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Quantitative structure-enantioselectivity relationships (QSERs) have been developed to describe the resolution of a series of chiral arylpropionic acids using capillary electrophoresis. Native beta-cyclodextrin and two derivatized forms are used as the chiral resolving agents. The QSER models are developed using the results of molecular mechanics calculations as input to multivariate linear regression and also to neural networks. Single models are developed to predict the optimum cyclodextrin to resolve a given analyte, the migration order, and the magnitude of the separation. Models are also developed to predict only the optimum cyclodextrin.
Collapse
Affiliation(s)
- J P Wolbach
- Analytical Research and Development, DuPont Pharmaceuticals, Wilmington, DE 19880-0353, USA
| | | | | |
Collapse
|
29
|
Retention and chiral recognition mechanism of organo-phosphorus compounds in high-performance liquid chromatography. ACTA ACUST UNITED AC 2001. [DOI: 10.1007/bf02879532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
30
|
Abstract
Protein interactions are important in determining the transport, metabolism and/or activity of many chiral compounds within the body. This review examines data that have been obtained on these interactions by various chromatographic and electrophoretic methods, especially those based on either high-performance liquid chromatography or capillary electrophoresis. Zonal elution, frontal analysis and vacancy methods are each considered, as are approaches that employ either soluble or immobilized proteins. There are a variety of different items that can be learned about a solute-protein system through these techniques. This includes information on the binding constants and number of binding sites for a solute-protein system, as well as the thermodynamic parameters, rate constants, interaction forces and binding site structure for the protein and solute. Numerous examples are provided throughout this review, as taken from the literature and from work performed within the author's laboratory.
Collapse
Affiliation(s)
- D S Hage
- Department of Chemistry, University of Nebraska--Lincoln, 68588-0304, USA.
| |
Collapse
|
31
|
Abstract
Chiral drugs, agrochemicals, food additives and fragrances represent classes of compounds with high economic and scientific potential. First the present implications of their chiral nature and necessity of separating enantiomers are summarised in this article. In the following a brief overview of the actual approaches to perform enantioseparations at analytical and preparative scale is given. Challenging aspects of these strategies, such as problems associated with data management, choice of suitable chiral selectors for given enantioseparations and enhanced understanding of the underlying chiral recognition principles, are discussed. Alternatives capable of meeting the requirements of industrial processes, in terms of productivity, cost-effectiveness and environmental issues (e.g., enantioselective membranes) are critically reviewed. The impact of combinatorial methodologies on faster and more effective development and optimisation of novel chiral selectors is outlined. Finally, the merits and limitations of most recent trends in discrimination of enantiomers, including advances in the fields of sensors, microanalysis systems, chiroptical methods and chemical force microscopy are evaluated.
Collapse
Affiliation(s)
- N M Maier
- Institute of Analytical Chemistry, University of Vienna, Austria
| | | | | |
Collapse
|
32
|
Roussel C, Bonnet B, Piederriere A, Suteu C. Enantioselective correlation between retention factor and lipophilicity index in chiral separation on cellulose and amylose tris(3,5-dimethylphenylcarbamate) CSPs in reversed mode: A case study. Chirality 2001; 13:56-61. [PMID: 11135416 DOI: 10.1002/1520-636x(2001)13:1<56::aid-chir11>3.0.co;2-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
For a series of alkyl substituted N-arylthiazoline-2-(thi)one atropisomers 1-14, lipophilicity indexes log kw obtained by polycratic RP-HPLC were compared to ln k(+)-S and ln k(-)-R obtained on CHIRALCEL OD-R(R) (reversed mode) and CHIRALPAK AD-RH(R) (reversed mode). Linear correlations were obtained in most cases. It appears that the correlation lines for R and S enantiomers may be parallel, convergent, or divergent, accounting for the observed alpha variation in going from methyl to tert-butyl series. Some tentative hypothesis are given as future investigation routes. Copyright 2000 Wiley-Liss, Inc.
Collapse
Affiliation(s)
- C Roussel
- ENSSPICAM, UMR CNRS 6516, University Aix-Marseille III, Marseille, France
| | | | | | | |
Collapse
|
33
|
Beck GM, Neau SH, Holder AJ, Hemenway JN. Evaluation of quantitative structure property relationships necessary for enantioresolution with lambda- and sulfobutylether lambda-carrageenan in capillary electrophoresis. Chirality 2000; 12:688-96. [PMID: 10984744 DOI: 10.1002/1520-636x(2000)12:9<688::aid-chir8>3.0.co;2-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Lambda-carrageenan, a linear, high molecular weight sulfated polysaccharide, was successfully employed in both its native and sulfobutyl derivatized form as a chiral selector in capillary electrophoresis for the separation of enantiomers of basic pharmaceutical compounds. In order to characterize the chiral selectivity properties of this chiral selector, various structurally related racemic compounds were analyzed for enantiomeric interactions using capillary electrophoresis. The results of these studies were then rationalized and analyzed utilizing a general quantitative structure-property relationship (QSPR) evaluation in order to predict critical analyte structural requirements for successful enantiomeric separation. Important structural components of the analytes were found to include the aromatic content, the type of substitution on the aromatic ring, presence of a primary or secondary protonated amine, and an overall positive charge to the molecule.
Collapse
Affiliation(s)
- G M Beck
- Quintiles, Inc., Kansas City, Missouri, USA
| | | | | | | |
Collapse
|
34
|
Andrisano V, Bertucci C, Cavrini V, Recanatini M, Cavalli A, Varoli L, Felix G, Wainer IW. Stereoselective binding of 2,3-substituted 3-hydroxypropionic acids on an immobilised human serum albumin chiral stationary phase: stereochemical characterisation and quantitative structure-retention relationship study. J Chromatogr A 2000; 876:75-86. [PMID: 10823503 DOI: 10.1016/s0021-9673(00)00195-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The binding characteristics of a series of 2,3-substituted 3-hydroxypropionic acids, with anti-inflammatory properties, bearing two chiral centres, were studied by HPLC upon HSA (human serum albumin)-based stationary phase. The compounds were analysed in their stereoisomeric erythro and threo forms and the chromatographic conditions for enantioseparation of the erythro and threo forms were studied on human serum albumin stationary phase. The enantiomer elution order was determined by injection of the enriched samples or by carrying out the CD spectra of each enantiomeric fraction. The absolute configuration of the single enantiomers was assigned on the basis of their CD spectra. A QSRR study was performed by subjecting the chromatographic data of the compounds to multiparameter regression analysis against various molecular descriptors to have insight into the chiral recognition mechanism. The lipophilicity appeared to be the most important parameter in determining the affinity to the protein, the compounds' capacity factors being linearly correlated to the experimental RP-HPLC partition coefficients (log k'w). The enantioselectivity factors (alpha) related to the enantiomers of the erythro and threo forms were studied taking into consideration both the physico-chemical parameters and the conformational behaviour of the compounds.
Collapse
Affiliation(s)
- V Andrisano
- Dipartimento di Scienze Farmaceutiche, Bologna, Italy
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Krupcík J, Spánik I, Oswald P, Májek P, Skacáni I, Sandra P. On the calculation of Gibbs energy corresponding to enantioselective interactions at a direct HRGC separation of enantiomers. Chirality 2000; 12:130-8. [PMID: 10689291 DOI: 10.1002/(sici)1520-636x(2000)12:3<130::aid-chir5>3.0.co;2-f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A novel procedure is proposed for the calculation of Gibbs energy corresponding to enantiospecific interactions of 2-(2, 4-dinitrophenoxy)-, 2-phenoxy-, and 2-halogen-n-pentane enantiomers with a beta-cyclodextrin (ChirasilDex) stationary phase under gas chromatographic conditions. This energy is calculated from retention data as a difference between the Gibbs energy of an enantiomer and its corresponding achiral congener. The procedure for the determination of 2-(2,4-dinitrophenoxy)-, 2-phenoxy- and 2-halogen- n-pentane achiral congener retention data is discussed in detail.
Collapse
Affiliation(s)
- J Krupcík
- Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak University of Technology, Bratislava, Slovak Republic
| | | | | | | | | | | |
Collapse
|
36
|
Comparison of two methods for the gas chromatographic determination of thermodynamic parameters of enantioselectivity. J Chromatogr A 1999. [DOI: 10.1016/s0021-9673(98)00781-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
37
|
Chilmonczyk Z, Ksycińska H, Poleć I. Application of chiral chromatographic parameters in quantitative structure-activity relationship analysis of homologous malathion derivatives. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1998; 720:65-9. [PMID: 9892068 DOI: 10.1016/s0378-4347(98)00429-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The conditions of the chiral resolution of the racemic malathion O,O-di-n-alkyl derivatives on cellulose tris(3,5-dimethylphenylcarbamate) are described. Quantitative relationships between chromatographic parameters obtained on chiral and achiral stationary phases and acute toxicity of the compounds towards house fly are derived and discussed.
Collapse
|
38
|
Ascoli GA, Bertucci C, Salvadori P. Ligand binding to a human serum albumin stationary phase: use of same-drug competition to discriminate pharmacologically relevant interactions. Biomed Chromatogr 1998; 12:248-54. [PMID: 9787894 DOI: 10.1002/(sici)1099-0801(199809/10)12:5<248::aid-bmc742>3.0.co;2-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A technique based on a human serum albumin (HSA) stationary phase high-pressure liquid chromatography (HPLC) has been successfully used for the past few years to characterize the interactions between HSA and new substrates. Immobilized HSA conserves the binding properties of the protein in solution, allowing fast and reliable analyses of binding interactions. Nevertheless, clear evidence that all binding mechanisms of HSA-HPLC are pharmacologically relevant is so far lacking. In particular, non-stoichiometric interactions of injected ligands with stationary phase components such as silica and the amino acid medium (other than protein binding areas) might interfere with the correlation between chromatographic retention and HSA binding. Here we present a quantitative method to distinguish between the molecular interactions of a ligand with binding areas of potential pharmacological interest and other, non-saturable binding mechanisms. Such a method, based on HPLC same-ligand displacement, is simple and reliable, as confirmed by in situ protein denaturation. Consequently, we were able to distinguish between different types of competitions detected in the co-binding of two drugs to HSA.
Collapse
Affiliation(s)
- G A Ascoli
- Centro Studio C.N.R. Macromolecole Stereordinate ed Otticamento Attive, Università di Pisa, Italy
| | | | | |
Collapse
|
39
|
Krupčík J, Špánik I, Oswald P, Skačáni I, Onuska FI, Sandra P. Evaluation of Enantioselective Interactions in Direct Separation of Enantiomers by Gas Chromatography. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1521-4168(19980301)21:3<197::aid-jhrc197>3.0.co;2-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
40
|
Atomistic modeling of enantioselection: Applications in chiral chromatography. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s1380-7323(98)80013-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
41
|
Salvadori P, Bertucci C, Ascoli G, Uccello-Barretta G, Rossi E. Direct resolution, characterization, and stereospecific binding properties of an atropisomeric 1,4-benzodiazepine. Chirality 1997; 9:495-505. [PMID: 9329179 DOI: 10.1002/(sici)1520-636x(1997)9:5/6<495::aid-chir16>3.0.co;2-j] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The chromatographic resolution of 7-chloro-1,3-dihydro-1-(1,1-dimethylethyl)-5- (2-fluorophenyl)-2H-1,4-benzodiazepin-2-on (7), the 2'-fluoro, N1-tertbutyl analogue of diazepam, was attained on both analytical and preparative (mgs) scales, by using several chiral stationary phases (CSPs). The stereochemistry of this compound was characterized by means of 1H-NMR Nuclear Overhauser Effect (NOE) analysis. The single enantiomers of 7 were tested for their configuration and stereochemical stability by circular dichroism (CD), and their interaction with the central nervous system (CNS) benzodiazepine receptor was assayed, showing a significant difference in their binding affinities. Protein binding studies with human serum albumin (HSA, the main benzodiazepine carrier in human plasma) immobilized on a silica stationary phase revealed that HSA also preferentially binds one stereoisomer of 7. However, both on line CD detection and stereospecific interaction with other common drugs clearly demonstrated that the stereoselectivity of immobilized HSA for 7 is opposite to that for all the other studied benzodiazepines. In addition, HSA stereoselectivity for 7 is opposite to CNS receptor binding stereoselectivity for the same compound. Such HSA anomalous stereoselectivity for 7 was also confirmed in aqueous buffer solution by competitive displacement studies. Compared to other chiral 1,4-benzodiazepines, compound 7 thus shows several anomalous binding properties: HSA and the CNS receptor demonstrated opposite enantioselective discrimination; HSA has reversed enantioselectivity for compound 7; and HSA stereospecifically binds the low-affinity enantiomer.
Collapse
Affiliation(s)
- P Salvadori
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Italy
| | | | | | | | | |
Collapse
|
42
|
Chilmonczyk Z, Ksycińska H, Mazgajska M, Cybulski J, Kaliszan R. Non-linear structure-enantioselective retention relationships in a homologous series of 1,4-disubstituted piperazine derivatives. J Chromatogr A 1997. [DOI: 10.1016/s0021-9673(97)00714-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
43
|
Booth TD, Azzaoui K, Wainer IW. Prediction of Chiral Chromatographic Separations Using Combined Multivariate Regression and Neural Networks. Anal Chem 1997; 69:3879-83. [DOI: 10.1021/ac9702150] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tristan D. Booth
- Departments of Chemistry and Oncology, McGill University, Montreal, Quebec, H3G 1A4 Canada
| | - Kamal Azzaoui
- Departments of Chemistry and Oncology, McGill University, Montreal, Quebec, H3G 1A4 Canada
| | - Irving W. Wainer
- Departments of Chemistry and Oncology, McGill University, Montreal, Quebec, H3G 1A4 Canada
| |
Collapse
|
44
|
Andrisano V, Booth TD, Cavrini V, Wainer IW. Enantioselective separation of chiral arylcarboxylic acids on an immobilized human serum albumin chiral stationary phase. Chirality 1997; 9:178-83. [PMID: 9134695 DOI: 10.1002/(sici)1520-636x(1997)9:2<178::aid-chir19>3.0.co;2-k] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A series of 12 chiral arylcarboxylic acids were chromatographed on an immobilized human serum albumin chiral stationary phase (HSA-CSP). The effects of solute structure on chromatographic retentions and enantioselective separations were examined by linear regression analysis and the construction of quantitative structure-enantioselective retention relationships. Competitive displacement studies were also conducted using R-ibuprofen as the displacing agent. The results indicate that the enantioselective retention of the solutes takes place at the indole-benzodiazepine site (site II) on the HSA molecule and that chiral recognition is affected by the hydrophobicity and steric volume of the solutes. The displacement studies also identified a cooperative allosteric interaction induced by the binding of R-ibuprofen to site II.
Collapse
Affiliation(s)
- V Andrisano
- Dipartimento di Scienze Farmaceutiche, Università di Bologna, Italy
| | | | | | | |
Collapse
|
45
|
Mechanistic investigation into the enantioselective separation of mexiletine and related compounds, chromatographed on an amylose tris(3,5-dimethylphenylcarbamate) chiral stationary phase. J Chromatogr A 1996. [DOI: 10.1016/0021-9673(96)00208-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
46
|
Booth TD, Wainer IW. Investigation of the enantioselective separations of α-alkylarylcarboxylic acids on an amylose tris(3,5-dimethylphenylcarbamate) chiral stationary phase using quantitative structure-enantioselective retention relationships Identification of a conformationally driven chiral recognition mechanism. J Chromatogr A 1996. [DOI: 10.1016/0021-9673(96)00011-8] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
47
|
Ashton DS, Beddell CR, Cockerill GS, Gohil K, Gowrie C, Robinson JE, Slater MJ, Valko K. Binding measurements of indolocarbazole derivatives to immobilised human serum albumin by high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL APPLICATIONS 1996; 677:194-8. [PMID: 8925096 DOI: 10.1016/0378-4347(95)00458-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The binding properties of six indolocarbazole derivative have been measured using immobilised human serum albumin (HSA) in an HPLC column. The compounds showed very strong binding to HSA which necessitated the application of a 30 to 40% concentration of 2-propanol in the mobile phase. This represents a much higher concentration than is recommended by the column manufacturers. This HSA column had not changed its binding property when it was used again with 4% 2-propanol and 96% phosphate buffer. The binding parameters were estimated by extrapolation to 0% 2-propanol and were above 99% for each indolocarbazole derivative. The correlation analysis, including the calculated octanol/water partition coefficient (log P), pKa values as well as measured reversed-phase retention data of the compounds revealed that the extremely strong binding can be explained by the hydrophobic and acidic properties of the compounds.
Collapse
Affiliation(s)
- D S Ashton
- Department of Physical Sciences, Wellcome Research Laboratories, Beckenham, Kent, UK
| | | | | | | | | | | | | | | |
Collapse
|
48
|
|
49
|
Abu-Lafi S, Sterin M, Levin S. Role of hydroxyl groups in chiral recognition of cannabinoids by carbamated amylose. J Chromatogr A 1994. [DOI: 10.1016/0021-9673(94)80310-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
50
|
Wainer IW. Enantioselective high-performance liquid affinity chromatography as a probe of ligand-biopolymer interactions: an overview of a different use for high-performance liquid chromatographic chiral stationary phases. J Chromatogr A 1994. [DOI: 10.1016/0021-9673(94)80384-6] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|