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de Los Santos-Ramirez JM, Boyas-Chavez PG, Cerrillos-Ordoñez A, Mata-Gomez M, Gallo-Villanueva RC, Perez-Gonzalez VH. Trends and challenges in microfluidic methods for protein manipulation-A review. Electrophoresis 2024; 45:69-100. [PMID: 37259641 DOI: 10.1002/elps.202300056] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 05/06/2023] [Accepted: 05/11/2023] [Indexed: 06/02/2023]
Abstract
Proteins are important molecules involved in an immensely large number of biological processes. Being capable of manipulating proteins is critical for developing reliable and affordable techniques to analyze and/or detect them. Such techniques would enable the production of therapeutic agents for the treatment of diseases or other biotechnological applications (e.g., bioreactors or biocatalysis). Microfluidic technology represents a potential solution to protein manipulation challenges because of the diverse phenomena that can be exploited to achieve micro- and nanoparticle manipulation. In this review, we discuss recent contributions made in the field of protein manipulation in microfluidic systems using different physicochemical principles and techniques, some of which are miniaturized versions of already established macro-scale techniques.
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Affiliation(s)
| | - Pablo G Boyas-Chavez
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, Nuevo León, Mexico
| | | | - Marco Mata-Gomez
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, Nuevo León, Mexico
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2
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Kawai Y, Idegami K, Sueyoshi K, Endo T, Hisamoto H. Single-step Trypsin Inhibitor Assay on a Microchannel Array Device Immobilizing Enzymes and Fluorescent Substrates by Inkjet Printing. ANAL SCI 2021; 37:1473-1476. [PMID: 33952864 DOI: 10.2116/analsci.21n011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this paper, we report a single-step trypsin inhibitor assay on a microchannel array device immobilizing enzymes and substrates by inkjet printing. The microdevice is composed of a poly(dimethylsiloxane) (PDMS) microchannel array that immobilizes trypsin and fluorescent substrates as reactive reagents at the two bottom corners of a microchannel. Inkjet printers allow simple, accurate, and position-selective immobilization of reagents as nanoliter spots. Therefore, plural reactive reagents, such as enzymes and substrates, can be separately immobilized at different positions in the same microchannel without mixing, and thus allowing for single-step operation by simply introducing a sample solution through capillary action. Furthermore, reproducible fabrication and mass production of the device could be expected. In this study, the efficiency of an acidic solution as a spotting agent for protease immobilization to prevent decrease in the fluorescence intensity was confirmed. Additionally, single-step trypsin inhibitor screening was performed using three inhibitors. Finally, we investigated the storage stability of the device and confirmed that it remained stable for at least 10 days.
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Affiliation(s)
- Yuko Kawai
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
| | | | - Kenji Sueyoshi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University.,Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO)
| | - Tatsuro Endo
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
| | - Hideaki Hisamoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
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Zhang XW, Bian GL, Kang PY, Cheng XJ, Yan K, Liu YL, Gao YX, Li DQ. Recent advance in the discovery of tyrosinase inhibitors from natural sources via separation methods. J Enzyme Inhib Med Chem 2021; 36:2104-2117. [PMID: 34579614 PMCID: PMC8480707 DOI: 10.1080/14756366.2021.1983559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Tyrosinase (TYR) inhibitors are in great demand in the food, cosmetic and medical industrials due to their important roles. Therefore, the discovery of high-quality TYR inhibitors is always pursued. Natural products as one of the most important sources of bioactive compounds discovery have been increasingly used for TYR inhibitors screening. However, due to their complex compositions, it is still a great challenge to rapid screening and identification of biologically active components from them. In recent years, with the help of separation technologies and the affinity and intrinsic activity of target enzymes, two advanced approaches including affinity screening and inhibition profiling showed great promises for a successful screening of bioactive compounds from natural sources. This review summarises the recent progress of separation-based methods for TYR inhibitors screening, with an emphasis on the principle, application, advantage, and drawback of each method along with perspectives in the future development of these screening techniques and screened hit compounds.
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Affiliation(s)
- Xiao-Wei Zhang
- Department of Neurological Surgery, the Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Guang-Li Bian
- Department of Pharmacy, the Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Pei-Ying Kang
- Department of Clinical Laboratory, the Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xin-Jie Cheng
- Department of Pharmacy, the Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Kai Yan
- Institute for Drug Control of Hebei Province, Shijiazhuang, China
| | - Yong-Li Liu
- Institute for Drug Control of Hebei Province, Shijiazhuang, China
| | - Yan-Xia Gao
- Institute for Drug Control of Hebei Province, Shijiazhuang, China
| | - De-Qiang Li
- Department of Pharmacy, the Second Hospital of Hebei Medical University, Shijiazhuang, China
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4
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Li P, He FQ, Ma XH, Jin L, Chen J. Dopamine-polyethyleneimine co-deposition of a capillary for α-glucosidase immobilization and its application in enzyme inhibitor screening. Electrophoresis 2021; 42:2081-2086. [PMID: 34347304 DOI: 10.1002/elps.202100185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/25/2021] [Accepted: 07/28/2021] [Indexed: 11/07/2022]
Abstract
An online method based on CE was established to screen α-glucosidase inhibitors from traditional Tibetan medicine extracts. First, the inner wall at the inlet of capillary column was simply and effectively functionalized by dopamine-polyethyleneimine co-deposition method, which combines the adhesion property of dopamine and easy cationization of polyethyleneimine. Then α-glucosidase was rapidly immobilized on the inner wall of the capillary column by electrostatic adsorption. The inter- and intraday repeatability of the peak area of the enzymatic reaction product (p-nitrophenol) in a capillary was evaluated, and RSD% (n = 3) was 0.94% and 1.09%, respectively. Good batch-to-batch reproducibility of the peak area between different capillaries (RSD = 2.1%, n = 5) shows that the preparation method has good reproducibility. The Michaelis-Menten constant of the immobilized α-glucosidase was measured to be 1.18 mM, and the capillary column enzyme reactor retained 85.9% of initial activity after 30 cycles. Finally, it was applied to the screening of enzyme inhibitors in 20 traditional Tibetan medicine extracts. Sixteen medicines with inhibitory activity were screened out, and Rheum australe had the strongest inhibitory effect with an inhibitory rate of 83.3 ± 0.4%. These results showed that this method is effective to find potential enzyme inhibitors.
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Affiliation(s)
- Peng Li
- School of Pharmacy, Lanzhou University, Lanzhou, P. R. China
| | - Fu-Qin He
- School of Pharmacy, Lanzhou University, Lanzhou, P. R. China
| | - Xiao-Hui Ma
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, P. R. China
| | - Ling Jin
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, P. R. China
| | - Juan Chen
- School of Pharmacy, Lanzhou University, Lanzhou, P. R. China
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5
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Xu M, Zhang H, Tang T, Zhou J, Zhou W, Tan S, He B. Potential and applications of capillary electrophoresis for analyzing traditional Chinese medicine: a critical review. Analyst 2021; 146:4724-4736. [PMID: 34269779 DOI: 10.1039/d1an00767j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Capillary electrophoresis (CE) presents a promising possibility for analyzing traditional Chinese medicine (TCM) due to its low reagent consumption, high analysis speed, and enhanced efficiency. Herein we review the employment of CE for analyzing the effective components in TCM and identifying TCM via a fingerprint. Furthermore, we discuss the application of state-of-the-art capillary electrophoresis modes for screening enzyme inhibitors and investigating the interactions between TCM and plasma proteins. The review concludes with recommendations for future studies and improvements in this field of research. The general development trend identified in this review indicates that the application of CE has significantly improved TCM assay performance.
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Affiliation(s)
- Mengchang Xu
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
| | - Hanyong Zhang
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
| | - Tong Tang
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
| | - Ji Zhou
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
| | - Wenhu Zhou
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
| | - Songwen Tan
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
| | - Binsheng He
- Academician Workstation, Changsha Medical University, Changsha 410219, China.
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Al Hamoui Dit Banni G, Nasreddine R, Fayad S, Cao-Ngoc P, Rossi JC, Leclercq L, Cottet H, Marchal A, Nehmé R. Screening for pancreatic lipase natural modulators by capillary electrophoresis hyphenated to spectrophotometric and conductometric dual detection. Analyst 2021; 146:1386-1401. [PMID: 33404014 DOI: 10.1039/d0an02234a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The search for novel pancreatic lipase (PL) inhibitors has gained increasing attention in recent years. For the first time, a dual detection capillary electrophoresis (CE)-based homogeneous lipase assay was developed employing both the offline and online reaction modes. The hydrolysis of 4-nitrophenyl butyrate (4-NPB) catalyzed by PL into 4-nitrophenol and butyrate was monitored by spectrophotometric and conductimetric detection, respectively. The assays presented several advantages such as economy in consumption (few tens of nanoliters for online assays to few tens of microliters for offline assays), no modification of lipase, rapidity (<10 min) and versatility. Tris/MOPS (10 mM, pH 6.6) was used as the background electrolyte and the incubation buffer for enzymatic reactions. We confirmed that in the conditions of the study (small substrate 4-NPB, 37 °C, pH 6.6), the PL was active even in the absence of dipalmitoylphosphatidylcholine (DPPC) vesicles, generally used to mimic the lipid-water interface. This was confirmed by the maximum velocity (Vmax) and the Michaelis-Menten constant (Km) values that were the same order of magnitude in the absence and presence of DPPC. The developed method was used to screen crude aqueous plant extracts and purified compounds. We were able to identify the promising PL inhibition of hawthorn leaf herbal infusions at 1 mg mL-1 (37%) and PL activation by fresh and dry hawthorn flowers (∼24%). Additionally, two triterpenoids purified from extracts of oakwood were identified for the first time as potent PL inhibitors demonstrating 51 and 58% inhibition at 1 mg mL-1, respectively.
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Affiliation(s)
- Ghassan Al Hamoui Dit Banni
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France.
| | - Rouba Nasreddine
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France.
| | - Syntia Fayad
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France. and Université de Bordeaux, ISVV, EA 5477, Unité de recherche Œnologie, USC 1366 INRA, F-33882, Villenave d'Ornon, France
| | - Phu Cao-Ngoc
- IBMM, University of Montpellier, CNRS, ENSCM, 34059 Montpellier, France
| | | | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, 34059 Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, 34059 Montpellier, France
| | - Axel Marchal
- Université de Bordeaux, ISVV, EA 5477, Unité de recherche Œnologie, USC 1366 INRA, F-33882, Villenave d'Ornon, France
| | - Reine Nehmé
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France.
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7
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An immobilization enzyme for screening lipase inhibitors from Tibetan medicines. J Chromatogr A 2020; 1615:460711. [DOI: 10.1016/j.chroma.2019.460711] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 01/08/2023]
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8
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Wu K, Su D, Liu J, Saha R, Wang JP. Magnetic nanoparticles in nanomedicine: a review of recent advances. NANOTECHNOLOGY 2019; 30:502003. [PMID: 31491782 DOI: 10.1088/1361-6528/ab4241] [Citation(s) in RCA: 209] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Nanomaterials, in addition to their small size, possess unique physicochemical properties that differ from bulk materials, making them ideal for a host of novel applications. Magnetic nanoparticles (MNPs) are one important class of nanomaterials that have been widely studied for their potential applications in nanomedicine. Due to the fact that MNPs can be detected and manipulated by remote magnetic fields, it opens a wide opportunity for them to be used in vivo. Nowadays, MNPs have been used for diverse applications including magnetic biosensing (diagnostics), magnetic imaging, magnetic separation, drug and gene delivery, and hyperthermia therapy, etc. Specifically, we reviewed some emerging techniques in magnetic diagnostics such as magnetoresistive (MR) and micro-Hall (μHall) biosensors, as well as the magnetic particle spectroscopy, magnetic relaxation switching and surface enhanced Raman spectroscopy (SERS)-based bioassays. Recent advances in applying MNPs as contrast agents in magnetic resonance imaging and as tracer materials in magnetic particle imaging are reviewed. In addition, the development of high magnetic moment MNPs with proper surface functionalization has progressed exponentially over the past decade. To this end, different MNP synthesis approaches and surface coating strategies are reviewed and the biocompatibility and toxicity of surface functionalized MNP nanocomposites are also discussed. Herein, we are aiming to provide a comprehensive assessment of the state-of-the-art biological and biomedical applications of MNPs. This review is not only to provide in-depth insights into the different synthesis, biofunctionalization, biosensing, imaging, and therapy methods but also to give an overview of limitations and possibilities of each technology.
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Affiliation(s)
- Kai Wu
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, United States of America
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9
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Zhang C, Woolfork AG, Suh K, Ovbude S, Bi C, Elzoeiry M, Hage DS. Clinical and pharmaceutical applications of affinity ligands in capillary electrophoresis: A review. J Pharm Biomed Anal 2019; 177:112882. [PMID: 31542417 DOI: 10.1016/j.jpba.2019.112882] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/07/2019] [Accepted: 09/10/2019] [Indexed: 01/14/2023]
Abstract
Affinity capillary electrophoresis (ACE) is a separation technique that combines a biologically-related binding agent with the separating power and efficiency of capillary electrophoresis. This review will examine several classes of binding agents that have been used in ACE and applications that have been described for the resulting methods in clinical or pharmaceutical analysis. Binding agents that will be considered are antibodies, aptamers, lectins, serum proteins, carbohydrates, and enzymes. This review will also describe the various formats in which each type of binding agent has been used in CE, including both homogeneous and heterogeneous methods. Specific areas of applications that will be considered are CE-based immunoassays, glycoprotein/glycan separations, chiral separations, and biointeraction studies. The general principles and formats of ACE for each of these applications will be examined, along with the potential advantages or limitations of these methods.
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Affiliation(s)
- Chenhua Zhang
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Ashley G Woolfork
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Kyungah Suh
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Susan Ovbude
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Cong Bi
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Marawan Elzoeiry
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA.
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Kucherenko E, Kanateva A, Pirogov A, Kurganov A. Recent advances in the preparation of adsorbent layers for thin-layer chromatography combined with matrix-assisted laser desorption/ionization mass-spectrometric detection. J Sep Sci 2018; 42:415-430. [DOI: 10.1002/jssc.201800625] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/14/2018] [Accepted: 08/21/2018] [Indexed: 01/09/2023]
Affiliation(s)
| | - Anastasiia Kanateva
- Russian Academy of Sciences; A.V. Topchiev Institute of Petrochemical Synthesis; Moscow Russia
| | - Andrey Pirogov
- Faculty of Chemistry; M.V. Lomonosov Moscow State University; Moscow Russia
| | - Alexander Kurganov
- Russian Academy of Sciences; A.V. Topchiev Institute of Petrochemical Synthesis; Moscow Russia
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11
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Li QQ, Yang FQ, Wang YZ, Wu ZY, Xia ZN, Chen H. Evaluation of thrombin inhibitory activity of catechins by online capillary electrophoresis-based immobilized enzyme microreactor and molecular docking. Talanta 2018; 185:16-22. [DOI: 10.1016/j.talanta.2018.03.049] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/10/2018] [Accepted: 03/15/2018] [Indexed: 01/09/2023]
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12
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Raza R, Bai Y, Liu H. Development of a fast CE method for high throughput screening of ecto-5′-nucleotidase inhibitors. Electrophoresis 2018; 39:2612-2618. [DOI: 10.1002/elps.201800105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 05/01/2018] [Accepted: 05/03/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Rabia Raza
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering; Peking University; Beijing P. R. China
| | - Yu Bai
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering; Peking University; Beijing P. R. China
| | - Huwei Liu
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering; Peking University; Beijing P. R. China
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13
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Cheng M, Chen Z. Recent advances in screening of enzymes inhibitors based on capillary electrophoresis. J Pharm Anal 2018; 8:226-233. [PMID: 30140486 PMCID: PMC6104152 DOI: 10.1016/j.jpha.2018.05.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/31/2018] [Accepted: 05/09/2018] [Indexed: 12/13/2022] Open
Abstract
Capillary electrophoresis with many advantages plays an important role in pharmaceutical analysis and drug screening. This review gives an overview on the recent advances in the developments and applications of capillary electrophoresis in the field of enzyme inhibitor screening. The period covers 2013 to 2017. Both the pre-capillary enzyme assays and in-capillary enzyme assays which include electrophoretically mediated microanalysis (EMMA) and immobilized enzyme microreactor (IMER) are summarized in this article.
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14
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A powerful on line ABTS +-CE-DAD method to screen and quantify major antioxidants for quality control of Shuxuening Injection. Sci Rep 2018; 8:5441. [PMID: 29615669 PMCID: PMC5883040 DOI: 10.1038/s41598-018-23748-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 03/20/2018] [Indexed: 12/15/2022] Open
Abstract
A novel method of on-line 2,2'-Azinobis-(3-ethylbenzthiazoline-6-sulphonate)-Capillary Electrophoresis-Diode Array Detector (on-line ABTS+-CE-DAD) was developed to screen the major antioxidants from complex herbal medicines. ABTS+, one of well-known oxygen free radicals was firstly integrated into the capillary. For simultaneously detecting and separating ABTS+ and chemical components of herb medicines, some conditions were optimized. The on-line ABTS+-CE-DAD method has successfully been used to screen the main antioxidants from Shuxuening injection (SI), an herbal medicines injection. Under the optimum conditions, nine ingredients of SI including clitorin, rutin, isoquercitrin, Quercetin-3-O-D-glucosyl]-(1-2)-L-rhamnoside, kaempferol-3-O-rutinoside, kaempferol-7-O-β-D-glucopyranoside, apigenin-7-O-Glucoside, quercetin-3-O-[2-O-(6-O-p-hydroxyl-E-coumaroyl)-D-glucosyl]-(1-2)-L-rhamnoside, 3-O-{2-O-[6-O-(p-hydroxyl-E-coumaroyl)-glucosyl]}-(1-2) rhamnosyl kaempfero were separated and identified as the major antioxidants. There is a linear relationship between the total amount of major antioxidants and total antioxidative activity of SI with a linear correlation coefficient of 0.9456. All the Relative standard deviations of recovery, precision and stability were below 7.5%. Based on these results, these nine ingredients could be selected as combinatorial markers to evaluate quality control of SI. It was concluded that on-line ABTS+-CE-DAD method was a simple, reliable and powerful tool to screen and quantify active ingredients for evaluating quality of herbal medicines.
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15
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Beneito-Cambra M, Gareil P, Badet B, Badet-Denisot MA, Delaunay N. First investigations for the characterization of glucosamine-6-phosphate synthase by capillary electrophoresis. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1072:130-135. [DOI: 10.1016/j.jchromb.2017.11.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 11/08/2017] [Accepted: 11/10/2017] [Indexed: 12/13/2022]
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16
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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
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17
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Ferey J, Da Silva D, Lafite P, Daniellou R, Maunit B. TLC-UV hyphenated with MALDI-TOFMS for the screening of invertase substrates in plant extracts. Talanta 2017; 170:419-424. [DOI: 10.1016/j.talanta.2017.04.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/13/2017] [Accepted: 04/16/2017] [Indexed: 10/19/2022]
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18
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Cheng M, Chen Z. Screening of tyrosinase inhibitors by capillary electrophoresis with immobilized enzyme microreactor and molecular docking. Electrophoresis 2016; 38:486-493. [PMID: 27862041 DOI: 10.1002/elps.201600367] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/23/2016] [Accepted: 10/24/2016] [Indexed: 12/22/2022]
Abstract
A new method for screening tyrosinase inhibitors from traditional Chinese medicines (TCMs) was successfully developed by capillary electrophoresis with reliable online immobilized enzyme microreactor (IMER). In addition, molecular docking study has been used for supporting inhibition interaction between enzyme and inhibitors. The IMER of tyrosinase was constructed at the outlet of the capillary by using glutaraldehyde as cross-linker. The parameters including enzyme reaction, separation of the substrate and product, and the performance of immobilized tyrosinase were investigated systematically. Because of using short-end injection procedure, the product and substrate were effectively separated within 2 min. The immobilized tyrosinase could remain 80% active for 30 days at 4°C. The Michaelis-Menten constant of tyrosinase was determined as 1.78 mM. Kojic acid, a known tyrosinase inhibitor, was used as a model compound for the validation of the inhibitors screening method. The half-maximal inhibitory concentration of kojic acid was 5.55 μM. The method was successfully applied for screening tyrosinase inhibitors from 15 compounds of TCM. Four compounds including quercetin, kaempferol, bavachinin, and bakuchiol were found having inhibitory potentials. The results obtained in this work were supported by molecular docking study.
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Affiliation(s)
- Mengxia Cheng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and Wuhan University School of Pharmaceutical Sciences, Wuhan, P. R., China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing, P. R., China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and Wuhan University School of Pharmaceutical Sciences, Wuhan, P. R., China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing, P. R., China
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Md Ali MA, Ostrikov K(K, Khalid FA, Majlis BY, Kayani AA. Active bioparticle manipulation in microfluidic systems. RSC Adv 2016. [DOI: 10.1039/c6ra20080j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The motion of bioparticles in a microfluidic environment can be actively controlled using several tuneable mechanisms, including hydrodynamic, electrophoresis, dielectrophoresis, magnetophoresis, acoustophoresis, thermophoresis and optical forces.
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Affiliation(s)
- Mohd Anuar Md Ali
- Institute of Microengineering and Nanoelectronics
- Universiti Kebangsaan Malaysia
- Bangi
- Malaysia
| | - Kostya (Ken) Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory
| | - Fararishah Abdul Khalid
- Faculty of Technology Management and Technopreneurship
- Universiti Teknikal Malaysia Melaka
- Malaysia
| | - Burhanuddin Y. Majlis
- Institute of Microengineering and Nanoelectronics
- Universiti Kebangsaan Malaysia
- Bangi
- Malaysia
| | - Aminuddin A. Kayani
- Institute of Microengineering and Nanoelectronics
- Universiti Kebangsaan Malaysia
- Bangi
- Malaysia
- Center for Advanced Materials and Green Technology
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