1
|
Marie A, Georgescauld F, Johnson KR, Ray S, Engen JR, Ivanov AR. Native Capillary Electrophoresis-Mass Spectrometry of Near 1 MDa Non-Covalent GroEL/GroES/Substrate Protein Complexes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306824. [PMID: 38191978 PMCID: PMC10953559 DOI: 10.1002/advs.202306824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 12/21/2023] [Indexed: 01/10/2024]
Abstract
Protein complexes are essential for proteins' folding and biological function. Currently, native analysis of large multimeric protein complexes remains challenging. Structural biology techniques are time-consuming and often cannot monitor the proteins' dynamics in solution. Here, a capillary electrophoresis-mass spectrometry (CE-MS) method is reported to characterize, under near-physiological conditions, the conformational rearrangements of ∽1 MDa GroEL upon complexation with binding partners involved in a protein folding cycle. The developed CE-MS method is fast (30 min per run), highly sensitive (low-amol level), and requires ∽10 000-fold fewer samples compared to biochemical/biophysical techniques. The method successfully separates GroEL14 (∽800 kDa), GroEL7 (∽400 kDa), GroES7 (∽73 kDa), and NanA4 (∽130 kDa) oligomers. The non-covalent binding of natural substrate proteins with GroEL14 can be detected and quantified. The technique allows monitoring of GroEL14 conformational changes upon complexation with (ATPγS)4-14 and GroES7 (∽876 kDa). Native CE-pseudo-MS3 analyses of wild-type (WT) GroEL and two GroEL mutants result in up to 60% sequence coverage and highlight subtle structural differences between WT and mutated GroEL. The presented results demonstrate the superior CE-MS performance for multimeric complexes' characterization versus direct infusion ESI-MS. This study shows the CE-MS potential to provide information on binding stoichiometry and kinetics for various protein complexes.
Collapse
Affiliation(s)
- Anne‐Lise Marie
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Florian Georgescauld
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Kendall R. Johnson
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Somak Ray
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - John R. Engen
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| | - Alexander R. Ivanov
- Barnett Institute of Chemical and Biological AnalysisDepartment of Chemistry and Chemical BiologyNortheastern University360 Huntington AvenueBostonMA02115USA
| |
Collapse
|
2
|
A 96-multiplex capillary electrophoresis screening platform for product based evolution of P450 BM3. Sci Rep 2019; 9:15479. [PMID: 31664146 PMCID: PMC6820799 DOI: 10.1038/s41598-019-52077-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 10/04/2019] [Indexed: 11/08/2022] Open
Abstract
The main challenge that prevents a broader application of directed enzyme evolution is the lack of high-throughput screening systems with universal product analytics. Most directed evolution campaigns employ screening systems based on colorimetric or fluorogenic surrogate substrates or universal quantification methods such as nuclear magnetic resonance spectroscopy or mass spectrometry, which have not been advanced to achieve a high-throughput. Capillary electrophoresis with a universal UV-based product detection is a promising analytical tool to quantify product formation. Usage of a multiplex system allows the simultaneous measurement with 96 capillaries. A 96-multiplexed capillary electrophoresis (MP-CE) enables a throughput that is comparable to traditional direct evolution campaigns employing 96-well microtiter plates. Here, we report for the first time the usage of a MP-CE system for directed P450 BM3 evolution towards increased product formation (oxidation of alpha-isophorone to 4-hydroxy-isophorone; highest reached total turnover number after evolution campaign: 7120 mol4-OH molP450−1). The MP-CE platform was 3.5-fold more efficient in identification of beneficial variants than the standard cofactor (NADPH) screening system.
Collapse
|
3
|
Aguiar AC, de Sousa LR, Garcia CR, Oliva G, Guido RV. New Molecular Targets and Strategies for Antimalarial Discovery. Curr Med Chem 2019; 26:4380-4402. [DOI: 10.2174/0929867324666170830103003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/24/2017] [Accepted: 07/24/2017] [Indexed: 02/07/2023]
Abstract
Malaria remains a major health problem, especially because of the emergence
of resistant P. falciparum strains to artemisinin derivatives. In this context, safe and affordable
antimalarial drugs are desperately needed. New proteins have been investigated
as molecular targets for research and development of innovative compounds with welldefined
mechanism of action. In this review, we highlight genetically and clinically validated
plasmodial proteins as drug targets for the next generation of therapeutics. The enzymes
described herein are involved in hemoglobin hydrolysis, the invasion process,
elongation factors for protein synthesis, pyrimidine biosynthesis, post-translational modifications
such as prenylation, phosphorylation and histone acetylation, generation of ATP
in mitochondrial metabolism and aminoacylation of RNAs. Significant advances on proteomics,
genetics, structural biology, computational and biophysical methods provided
invaluable molecular and structural information about these drug targets. Based on this,
several strategies and models have been applied to identify and improve lead compounds.
This review presents the recent progresses in the discovery of antimalarial drug candidates,
highlighting the approaches, challenges, and perspectives to deliver affordable, safe
and low single-dose medicines to treat malaria.
Collapse
Affiliation(s)
- Anna Caroline Aguiar
- Sao Carlos Institute of Physics, University of Sao Paulo, PO Box 369, 13560-970, Sao Carlos, SP, Brazil
| | - Lorena R.F. de Sousa
- Sao Carlos Institute of Physics, University of Sao Paulo, PO Box 369, 13560-970, Sao Carlos, SP, Brazil
| | - Celia R.S. Garcia
- Physiology Department, Bioscience Institute, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Glaucius Oliva
- Sao Carlos Institute of Physics, University of Sao Paulo, PO Box 369, 13560-970, Sao Carlos, SP, Brazil
| | - Rafael V.C. Guido
- Sao Carlos Institute of Physics, University of Sao Paulo, PO Box 369, 13560-970, Sao Carlos, SP, Brazil
| |
Collapse
|
4
|
Štícha M, Hložek T, Bursová M, Čabala R, Jelínek I. Development of a CE-MS method for the study of riociguat and metabolite M1 in pharmaceutical analysis. Electrophoresis 2019; 40:2936-2945. [PMID: 31520473 DOI: 10.1002/elps.201900181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 08/21/2019] [Accepted: 08/31/2019] [Indexed: 11/11/2022]
Abstract
Riociguat is a novel antihypertensive drug for the treatment of pulmonary hypertension. We present electrophoretic characterization, i.e. migration behavior of riociguat and metabolite M1 as support for optimized CZE/MS assay. Fundamental separation parameters, such as peak width, symmetry, and resolution are studied in a series of ammonium formate buffers within pH range 2.60-5.61. The narrow region of peak symmetry lies close to pH 4.0 for both analytes. Accordingly, the value of resolution maximizes in a background electrolyte adjusted to pH 4.10. Basic calibration parameters estimated from CZE experiments with absorption photometric and mass spectrometric detection of riociguat and metabolite M1 were evaluated. More than three orders lower LOD was achieved with high resolution mass spectrometric detection. The observed difference in the sensitivity of both detection techniques gives priority to the utilization of CZE/MS in practice. The values of dissociation constants of riociguat and metabolite M1, pKBH , were determined from CZE measurements in lithium formate and lithium acetate background electrolytes with constant ionic strength. The value of pKBH = 4.30 ± 0.02 for riociguat corresponds well to the value already presented in the literature. According to our observation, metabolite M1 behaves like a slightly stronger base with estimated pKBH = 4.40 ± 0.02.
Collapse
Affiliation(s)
- Martin Štícha
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague 2, Czech Republic
| | - Tomáš Hložek
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague 2, Czech Republic.,Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague 2, Czech Republic
| | - Miroslava Bursová
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague 2, Czech Republic.,Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague 2, Czech Republic
| | - Radomír Čabala
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague 2, Czech Republic.,Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague 2, Czech Republic
| | - Ivan Jelínek
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague 2, Czech Republic
| |
Collapse
|
5
|
Schejbal J, Glatz Z. Immobilized-enzyme reactors integrated with capillary electrophoresis for pharmaceutical research. J Sep Sci 2017; 41:323-335. [DOI: 10.1002/jssc.201700905] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/22/2017] [Accepted: 09/22/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Jan Schejbal
- Department of Biochemistry, Faculty of Science; Masaryk University; Brno Czech Republic
| | - Zdeněk Glatz
- Department of Biochemistry, Faculty of Science; Masaryk University; Brno Czech Republic
| |
Collapse
|
6
|
Ma H, Bai Y, Li J, Chang YX. Screening bioactive compounds from natural product and its preparations using capillary electrophoresis. Electrophoresis 2017; 39:260-274. [DOI: 10.1002/elps.201700239] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/31/2017] [Accepted: 09/01/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Huifen Ma
- Tianjin State Key Laboratory of Modern Chinese Medicine; Tianjin University of Traditional Chinese Medicine; Tianjin P. R. China
- Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine); Ministry of Education; Tianjin P. R. China
| | - Yun Bai
- Tianjin State Key Laboratory of Modern Chinese Medicine; Tianjin University of Traditional Chinese Medicine; Tianjin P. R. China
- Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine); Ministry of Education; Tianjin P. R. China
| | - Jin Li
- Tianjin State Key Laboratory of Modern Chinese Medicine; Tianjin University of Traditional Chinese Medicine; Tianjin P. R. China
| | - Yan-xu Chang
- Tianjin State Key Laboratory of Modern Chinese Medicine; Tianjin University of Traditional Chinese Medicine; Tianjin P. R. China
- Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine); Ministry of Education; Tianjin P. R. China
| |
Collapse
|
7
|
Huang S, Paul P, Ramana P, Adams E, Augustijns P, Van Schepdael A. Advances in Capillary Electrophoretically Mediated Microanalysis for On-line Enzymatic and Derivatization Reactions. Electrophoresis 2017; 39:97-110. [DOI: 10.1002/elps.201700262] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Shengyun Huang
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Prasanta Paul
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Pranov Ramana
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Erwin Adams
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Patrick Augustijns
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Drug delivery and disposition; Leuven Belgium
| | - Ann Van Schepdael
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| |
Collapse
|
8
|
Wang H, Lin P, Zhao S, Li S, Lu X, Liang H. Preparation of Magnetic Microsphere-Gold Nanoparticle-Immobilized Enzyme Batch Reactor and Its Application to Enzyme Inhibitor Screening in Natural Extracts by Capillary Electrophoresis. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600800] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hengshan Wang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Pingtan Lin
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Shulin Zhao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Shuting Li
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Xin Lu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| | - Hong Liang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy; Guangxi Normal University; Guilin Guangxi 541004 China
| |
Collapse
|
9
|
Ouimet CM, D’Amico CI, Kennedy RT. Advances in capillary electrophoresis and the implications for drug discovery. Expert Opin Drug Discov 2017; 12:213-224. [PMID: 27911223 PMCID: PMC5521262 DOI: 10.1080/17460441.2017.1268121] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Many screening platforms are prone to assay interferences that can be avoided by directly measuring the target or enzymatic product. Capillary electrophoresis (CE) and microchip electrophoresis (MCE) have been applied in a variety of formats to drug discovery. CE provides direct detection of the product allowing for the identification of some forms of assay interference. The high efficiency, rapid separations, and low volume requirements make CE amenable to drug discovery. Areas covered: This article describes advances in capillary electrophoresis throughput, sample introduction, and target assays as they pertain to drug discovery and screening. Instrumental advances discussed include integrated droplet microfluidics platforms and multiplexed arrays. Applications of CE to assays of diverse drug discovery targets, including enzymes and affinity interactions are also described. Expert opinion: Current screening with CE does not fully take advantage of the throughputs or low sample volumes possible with CE and is most suitable as a secondary screening method or for screens that are inaccessible with more common platforms. With further development, droplet microfluidics coupled to MCE could take advantage of the low sample requirements by performing assays on the nanoliter scale at high throughput.
Collapse
Affiliation(s)
- Claire M. Ouimet
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI, 48109, United States
| | - Cara I. D’Amico
- Department of Pharmacology, University of Michigan, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109, United States
| | - Robert T. Kennedy
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI, 48109, United States
- Department of Pharmacology, University of Michigan, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109, United States
| |
Collapse
|
10
|
Camara MA, Tian M, Liu X, Liu X, Wang Y, Yang J, Yang L. Determination of the inhibitory effect of green tea extract on glucose-6-phosphate dehydrogenase based on multilayer capillary enzyme microreactor. Biomed Chromatogr 2016; 30:1210-5. [DOI: 10.1002/bmc.3669] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Revised: 11/30/2015] [Accepted: 12/07/2015] [Indexed: 12/27/2022]
Affiliation(s)
| | - Miaomiao Tian
- Faculty of Chemistry; Northeast Normal University; Changchun Jilin 130024 China
| | - Xiaoxia Liu
- Faculty of Chemistry; Northeast Normal University; Changchun Jilin 130024 China
| | - Xin Liu
- Faculty of Chemistry; Northeast Normal University; Changchun Jilin 130024 China
| | - Yujia Wang
- Faculty of Chemistry; Northeast Normal University; Changchun Jilin 130024 China
| | - Jiqing Yang
- Faculty of Chemistry; Northeast Normal University; Changchun Jilin 130024 China
| | - Li Yang
- Faculty of Chemistry; Northeast Normal University; Changchun Jilin 130024 China
| |
Collapse
|
11
|
Guetschow ED, Kumar S, Lombard DB, Kennedy RT. Identification of sirtuin 5 inhibitors by ultrafast microchip electrophoresis using nanoliter volume samples. Anal Bioanal Chem 2015; 408:721-31. [PMID: 26635020 DOI: 10.1007/s00216-015-9206-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 11/13/2015] [Accepted: 11/19/2015] [Indexed: 01/26/2023]
Abstract
Sirtuin 5 (SIRT5) is a member of the sirtuin family of protein deacylases that catalyzes removal of post-translational modifications, such as succinyl and malonyl moieties, on lysine residues. In light of SIRT5's roles in regulating metabolism, and its reported oncogenic functions, SIRT5 modulators would be valuable tools for basic biological research and perhaps clinically. Several fluorescence assays for sirtuin modulators have been developed; however, the use of fluorogenic substrates has the potential to cause false positive results due to interactions of engineered substrates with enzyme or test compounds. Therefore, development of high-throughput screening (HTS) assays based on other methods is valuable. In this study, we report the development of a SIRT5 assay using microchip electrophoresis (MCE) for identification of SIRT5 modulators. A novel SIRT5 substrate based on succinate dehydrogenase (SDH) was developed to allow rapid and efficient separation of substrate and product peptide. To achieve high throughput, samples were injected onto the microchip using a droplet-based scheme. By coupling this approach to existing HTS sample preparation workflows, 1408 samples were analyzed at 0.5 Hz in 46 min. Using a 250 ms separation time, eight MCE injections could be made from each sample generating >11,000 electropherograms during analysis. Of the 1280 chemicals tested, eight were identified as inhibiting SIRT5 activity by at least 70% and verified by dose-response analysis.
Collapse
Affiliation(s)
- Erik D Guetschow
- Department of Chemistry, University of Michigan, 930 N University Ave, Ann Arbor, MI, 48109, USA
| | - Surinder Kumar
- Department of Pathology, University of Michigan, 1301 Catherine St, Ann Arbor, MI, 48109, USA
| | - David B Lombard
- Department of Pathology, University of Michigan, 1301 Catherine St, Ann Arbor, MI, 48109, USA.,Institute of Gerontology, University of Michigan, 300 N Ingalls St, Ann Arbor, MI, 48109, USA
| | - Robert T Kennedy
- Department of Chemistry, University of Michigan, 930 N University Ave, Ann Arbor, MI, 48109, USA. .,Department of Pharmacology, University of Michigan, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109, USA.
| |
Collapse
|
12
|
Nehmé R, Morin P. Advances in capillary electrophoresis for miniaturizing assays on kinase enzymes for drug discovery. Electrophoresis 2015; 36:2768-2797. [DOI: 10.1002/elps.201500239] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/02/2015] [Accepted: 07/14/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Reine Nehmé
- Institut de Chimie Organique et Analytique (ICOA); Université d'Orléans - CNRS; UMR 7311 Orléans France
| | - Philippe Morin
- Institut de Chimie Organique et Analytique (ICOA); Université d'Orléans - CNRS; UMR 7311 Orléans France
| |
Collapse
|
13
|
Kartsova LA, Bessonova EA. Biomedical applications of capillary electrophoresis. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
14
|
Liu X, Tian M, Camara MA, Guo L, Yang L. Sequential capillary electrophoresis analysis using optically gated sample injection and UV/vis detection. Electrophoresis 2015; 36:2380-5. [DOI: 10.1002/elps.201500066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 04/27/2015] [Accepted: 05/14/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaoxia Liu
- Faculty of Chemistry; Northeast Normal University; ChangChun Jilin P. R. China
| | - Miaomiao Tian
- Faculty of Chemistry; Northeast Normal University; ChangChun Jilin P. R. China
| | | | - Liping Guo
- Faculty of Chemistry; Northeast Normal University; ChangChun Jilin P. R. China
| | - Li Yang
- Faculty of Chemistry; Northeast Normal University; ChangChun Jilin P. R. China
| |
Collapse
|
15
|
|
16
|
Langmajerová M, Řemínek R, Pelcová M, Foret F, Glatz Z. Combination of on-line CE assay with MS detection for the study of drug metabolism by cytochromes P450. Electrophoresis 2015; 36:1365-73. [DOI: 10.1002/elps.201400394] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 01/09/2015] [Accepted: 01/29/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Monika Langmajerová
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology, Masaryk University; Brno Czech Republic
| | - Roman Řemínek
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology, Masaryk University; Brno Czech Republic
| | - Marta Pelcová
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology, Masaryk University; Brno Czech Republic
| | - František Foret
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology, Masaryk University; Brno Czech Republic
| | - Zdeněk Glatz
- Department of Biochemistry; Faculty of Science and CEITEC - Central European Institute of Technology, Masaryk University; Brno Czech Republic
| |
Collapse
|
17
|
Sötz VA, Kochmann S. Simultaneous separation and detection of anions and thiophilic cations using capillary-size anion exchange chromatography with suppressed conductivity detection. J Sep Sci 2015; 38:1301-9. [DOI: 10.1002/jssc.201401096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 01/05/2015] [Accepted: 01/25/2015] [Indexed: 02/04/2023]
Affiliation(s)
- Veronika Anna Sötz
- Institute of Analytical Chemistry; Chemo- and Biosensors; University of Regensburg; Regensburg Germany
| | - Sven Kochmann
- Institute of Analytical Chemistry; Chemo- and Biosensors; University of Regensburg; Regensburg Germany
| |
Collapse
|
18
|
New methods based on capillary electrophoresis for in vitro evaluation of protein tau phosphorylation by glycogen synthase kinase 3-β. Anal Bioanal Chem 2015; 407:2821-8. [PMID: 25711986 DOI: 10.1007/s00216-015-8495-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 12/11/2014] [Accepted: 01/14/2015] [Indexed: 10/23/2022]
Abstract
The hyperphosphorylation of tau protein is associated with the development of the neuronal pathology of Alzheimer's disease. As most conventional methods study only particular phosphorylation sites of tau, it is necessary to develop a simple and reliable assay to determine the phosphorylation of tau at multiple sites. Capillary electrophoresis (CE)-based enzymatic assays are not yet used to monitor tau phosphorylation. The present work aims to develop CE-based assays to evaluate tau phosphorylation by the glycogen synthase kinase 3-β (GSK3β). A novel pre-capillary CE assay was first developed. An in-capillary CE-based enzymatic assay was also used since this approach is known to be time- and cost- effective. The enzymatic reaction was monitored by quantifying the product adenosine 5'- diphosphate (ADP). The influence of two classes of glycosaminoglycan (GAG), namely heparin and heparan sulfate, on the phosphorylation reaction was also assessed. Results obtained by both CE approaches were comparable and in excellent agreement with those reported in the literature using conventional radiometric and immunoblotting methods. In fact, CE results confirmed the inductory effect of the sulfated sugars heparin and heparan sulfate on tau hyperphosphorylation, probably because of the exposition of new sites phosphorylatable by GSK3β. This study shows that simple (no-labeling), rapid (less than 30 min per assay), and eco-friendly (no-radioactivity) CE-based kinase assays can give insight into the abnormal phosphorylation of tau. They can be extended to screen different modulators of tau phosphorylation to highlight their function and to develop effective drugs for neurodegenerative disease treatments.
Collapse
|
19
|
Aturki Z, Rocco A, Rocchi S, Fanali S. Current applications of miniaturized chromatographic and electrophoretic techniques in drug analysis. J Pharm Biomed Anal 2014; 101:194-220. [DOI: 10.1016/j.jpba.2014.03.041] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 03/24/2014] [Indexed: 12/20/2022]
|
20
|
Zhao J, Hu DJ, Lao K, Yang ZM, Li SP. Advance of CE and CEC in phytochemical analysis (2012–2013). Electrophoresis 2014; 35:205-24. [PMID: 24114928 DOI: 10.1002/elps.201300321] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 12/11/2022]
Abstract
This article presents an overview of the advance of CE and CEC in phytochemical analysis, based on the literature not mentioned in our previous review papers [Chen, X. J., Zhao, J., Wang, Y. T., Huang, L. Q., Li, S. P., Electrophoresis 2012, 33, 168–179], mainly covering the years 2012–2013. In this article, attention is paid to online preconcentration, rapid separation, and sensitive detection. Selected examples illustrate the applicability of CE and CEC in biomedical, pharmaceutical, environmental, and food analysis. Finally, some general conclusions and future perspectives are given.
Collapse
|
21
|
Deeb SE, Wätzig H, El-Hady DA, Albishri HM, de Griend CSV, Scriba GKE. Recent advances in capillary electrophoretic migration techniques for pharmaceutical analysis. Electrophoresis 2014; 35:170-89. [PMID: 24395663 DOI: 10.1002/elps.201300411] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/04/2013] [Accepted: 10/04/2013] [Indexed: 12/31/2022]
Abstract
Since the introduction about 30 years ago, CE techniques have gained a significant impact in pharmaceutical analysis. The present review covers recent advances and applications of CE for the analysis of pharmaceuticals. Both small molecules and biomolecules such as proteins are considered. The applications range from the determination of drug-related substances to the analysis of counterions and the determination of physicochemical parameters. Furthermore, general considerations of CE methods in pharmaceutical analysis are described.
Collapse
Affiliation(s)
- Sami El Deeb
- Drug Analysis and Research Center, Department of Pharmaceutical Chemistry, Al-Azhar University - Gaza, Gaza, Palestine; Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Braunschweig, Germany
| | | | | | | | | | | |
Collapse
|
22
|
Pan Y, Karns K, Herr AE. Microfluidic electrophoretic mobility shift assays for quantitative biochemical analysis. Electrophoresis 2014; 35:2078-90. [PMID: 24591076 DOI: 10.1002/elps.201300500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 01/31/2014] [Accepted: 02/09/2014] [Indexed: 02/02/2023]
Abstract
Electrophoretic mobility shift assays (EMSAs) play an important role in analytical chemistry, quantitative bioscience, and point-of-care diagnostics. Emerging microfluidic lab-on-a-chip technologies bring high throughput and multiplexed analysis to affinity-based electrophoretic separations, greatly advancing the performance of traditional EMSAs. This review elaborates on the relevant theoretical basis for EMSAs, surveys microfluidic-based EMSA applications in molecular conformation analyses, immunoassays, affinity assays and genomics, and outlines challenges and potential future improvements needed from this powerful assay.
Collapse
Affiliation(s)
- Yuchen Pan
- Graduate Program in Bioengineering, University of California San Francisco and University of California Berkeley, CA, USA
| | | | | |
Collapse
|
23
|
Fu R, Liu L, Guo Y, Guo L, Yang L. Sequential micellar electrokinetic chromatography analysis of racemization reaction of alanine enantiomers. J Chromatogr A 2014; 1331:123-8. [DOI: 10.1016/j.chroma.2014.01.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Revised: 01/16/2014] [Accepted: 01/19/2014] [Indexed: 12/13/2022]
|
24
|
Yin Z, Zhao W, Tian M, Zhang Q, Guo L, Yang L. A capillary electrophoresis-based immobilized enzyme reactor using graphene oxide as a support via layer by layer electrostatic assembly. Analyst 2014; 139:1973-9. [DOI: 10.1039/c3an02241b] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Using graphene oxide as an enzyme support, we developed a novel CE-based microreactor via layer-by-layer electrostatic assembly, which can be used for accurate on-line analysis and characterization of peptides and proteins.
Collapse
Affiliation(s)
- Zhengri Yin
- Faculty of Chemistry
- Northeast Normal University
- Changchun, P. R. China
| | - Wenwen Zhao
- Faculty of Chemistry
- Northeast Normal University
- Changchun, P. R. China
| | - Miaomiao Tian
- Faculty of Chemistry
- Northeast Normal University
- Changchun, P. R. China
| | - Qian Zhang
- Faculty of Chemistry
- Northeast Normal University
- Changchun, P. R. China
| | - Liping Guo
- Faculty of Chemistry
- Northeast Normal University
- Changchun, P. R. China
| | - Li Yang
- Faculty of Chemistry
- Northeast Normal University
- Changchun, P. R. China
| |
Collapse
|
25
|
Xing X, Yang X, Liu T. Electrochemical Behavior of Cu Electrode and Its Application in CE Determination of Polyols. Chromatographia 2013. [DOI: 10.1007/s10337-013-2603-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
26
|
Abstract
The use of DBS is an appealing approach to employing microsampling techniques for the bioanalysis of samples, as has been demonstrated for the past 50 years in the metabolic screening of metabolites and diseases. In addition to its minimally invasive sample collection procedures and its economical merits, DBS microsampling benefits from the very high sensitivity, selectivity and multianalyte capabilities of LC–MS, which has been especially well demonstrated in newborn screening applications. Only a few microliters of a biological fluid are required for analysis, which also translates to significantly reduced demands on clinical samples from patients or from animals. Recently, the pharmaceutical industry and other arenas have begun to explore the utility and practicality of DBS microsampling. This review discusses the basis for why DBS techniques are likely to be part of the future, as well as offering insights into where these benefits may be realized.
Collapse
|