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Kartsova LA, Makeeva DV, Bessonova EA. Current Status of Capillary Electrophoresis. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s1061934820120084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kartsova L, Makeeva D, Davankov V. Nano-sized polymer and polymer-coated particles in electrokinetic separations. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115656] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Mao Z, Chen Z. Advances in capillary electro-chromatography. J Pharm Anal 2019; 9:227-237. [PMID: 31452960 PMCID: PMC6702421 DOI: 10.1016/j.jpha.2019.05.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/01/2019] [Accepted: 05/07/2019] [Indexed: 11/24/2022] Open
Abstract
Capillary electrochromatography (CEC) is a micro-scale separation technique which is a hybrid between capillary electrophoresis (CE) and liquid chromatography (LC). CEC can be performed in packed, monolithic and open-tubular columns. In recent three years (from 2016 to 2018), enormous attention for CEC has been the development of novel stationary phases. This review mainly covers the development of novel stationary phases for open-tubular and monolithic columns. In particular, some biomaterials attracted increasing interest. There are no significant breakthroughs in technology and principles in CEC. The typical CEC applications, especially chiral separations are described.
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Affiliation(s)
- Zhenkun Mao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.,State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China
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Zhang Y, Li L, Li T, Xin Y, Liu J, Ma F, Mao L. In vivo measurement of the dynamics of norepinephrine in an olfactory bulb following ischemia-induced olfactory dysfunction and its responses to dexamethasone treatment. Analyst 2018; 143:5247-5254. [PMID: 30276380 DOI: 10.1039/c8an01300d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Information on the dynamics of molecules following olfactory dysfunction remains essential for understanding the molecular events involved in the pathological process of olfactory dysfunction. This study for the first time demonstrates a method based on the combination of in vivo microdialysis with high performance liquid chromatography (HPLC) and electrochemical detection (ECD) for the measurement of the dynamics of norepinephrine (NE) in the olfactory bulbs of Sprague-Dawley rats following olfactory dysfunction induced by brain ischemia and its responses toward dexamethasone treatment. The method possesses a high spatial resolution and benefits from in vivo microdialysis and high selectivity and is thus capable of measuring NE in the olfactory bulb of rats. With this method, the basal level of NE in the olfactory bulb was evaluated to be ca. 235 ± 25 nM (n = 6). This level was found to increase by 260 ± 90% at a time point of 240 min after brain ischemia with bilateral ligation of both common carotid arteries. The increase was found to be suppressed upon the treatment of the animals with 0.2% dexamethasone in the olfactory bulb. These results suggest that NE is involved in the pathological process of ischemia-induced olfactory dysfunction and this information is useful to further understand the molecular events involved in olfactory dysfunction.
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Affiliation(s)
- Yinghong Zhang
- Department of Otorhinolaryngology, Peking University Third Hospital, Beijing 100083, China.
| | - Lijuan Li
- Department of Otorhinolaryngology, Peking University Third Hospital, Beijing 100083, China.
| | - Tao Li
- Department of Otorhinolaryngology, Peking University Third Hospital, Beijing 100083, China.
| | - Ying Xin
- Department of Otorhinolaryngology, Peking University Third Hospital, Beijing 100083, China.
| | - Junxiu Liu
- Department of Otorhinolaryngology, Peking University Third Hospital, Beijing 100083, China.
| | - Furong Ma
- Department of Otorhinolaryngology, Peking University Third Hospital, Beijing 100083, China.
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China.
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Mao Z, Qin X, Chen Z. Monolithic column functionalized with quinine derivative for anion‐exchange capillary electrochromatography. Electrophoresis 2018; 39:3006-3012. [DOI: 10.1002/elps.201800253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Zhenkun Mao
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of EducationWuhan University School of Pharmaceutical Sciences Wuhan P. R. China
| | - Xiaoning Qin
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of EducationWuhan University School of Pharmaceutical Sciences Wuhan P. R. China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of EducationWuhan University School of Pharmaceutical Sciences Wuhan P. R. China
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Enantiomeric separation of adrenaline, noradrenaline, and isoprenaline by capillary electrophoresis using streptomycin-modified gold nanoparticles. Mikrochim Acta 2018; 185:227. [PMID: 29594555 DOI: 10.1007/s00604-018-2758-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 03/04/2018] [Indexed: 10/17/2022]
Abstract
Enantiomeric separations of the adrenergic compounds adrenaline, noradrenaline, and isoprenaline were studied. Electromigrative separations were performed in uncoated fused silica capillaries using streptomycin-modified gold nanoparticles (ST-AuNPs) as an additive to the background electrolyte. The ST-AuNPs are shown to serve as an effective chiral selector. The modified AuNPs were characterized in terms of size and zeta potential, and by IR and UV-vis spectra. The effects of ST-AuNP concentration, pH value, temperature, and separation voltage on the separations were systematically studied. Under optimized experimental conditions, racemic mixtures of the respective adrenergic drugs were baseline-separated within 7 min with a resolution of up to 7.5. The relative standard deviations of the resolution in inter-day and intra-day studies (n = 5) were generally <5%. Graphical abstract Schematic of the method for enantiomeric separations. (A): At low concentrations of streptavidinylated gold nanoparticles (ST-AuNPs), the better matching enantiomer is preferably "transported" by the ST-AuNPs; (B) ST-AuNP concentration increased to an optimal value; (C): The ST-AuNP concentration is too high; even poorly matching enantiomers will be transported simultaneously.
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Abstract
This paper is the thirty-ninth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2016 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia, stress and social status, tolerance and dependence, learning and memory, eating and drinking, drug abuse and alcohol, sexual activity and hormones, pregnancy, development and endocrinology, mental illness and mood, seizures and neurologic disorders, electrical-related activity and neurophysiology, general activity and locomotion, gastrointestinal, renal and hepatic functions, cardiovascular responses, respiration and thermoregulation, and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and CUNY Neuroscience Collaborative, Queens College, City University of New York, Flushing, NY 11367, United States.
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Zhang D, Lan D, Pang X, Cui B, Bai L, Liu H, Yan H. Separation of proteins from complex bio-matrix samples using a double-functionalized polymer monolithic column. Analyst 2017; 143:280-288. [PMID: 29184931 DOI: 10.1039/c7an01491k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A double-functionalized polymer monolithic column was fabricated within the confines of a stainless-steel column (50 mm × 4.6 mm i.d.) via a facile method using iron porphyrin, ionic liquid (1-allyl-3-methylimidazolium chloride) and 1,10-decanediol dimethacrylate as tri-monomers; ethylene dimethacrylate as a crosslinker; polyethylene glycol 400 and N,N-dimethylformamide as co-porogens; benzoyl peroxide and N,N-dimethyl aniline as the redox initiation system. Results obtained from scanning electron microscopy, nitrogen adsorption-desorption, and mercury intrusion porosimetry confirmed the uniform pore structure and the pore size distribution of macro-pores. The home-made monolith was further characterized by elemental analysis to investigate the elemental composition of Fe supplied by iron porphyrin, confirming the synthetic process. The resulting optimized monolithic column was used as the stationary phase in high performance liquid chromatography for separating proteins, such as mixture of standard proteins, egg white, and human plasma, exhibiting good selectivity and high performance. It is worth noting that the home-made double-functionalized polymer monolithic column shows excellent selectivity for fractionation separation of human plasma proteins, and it is a promising separation tool for complex bio-samples in proteomic research.
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Affiliation(s)
- Doudou Zhang
- College of Pharmaceutical Sciences, Hebei University, Baoding, 071002, China.
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2015-mid 2017). Electrophoresis 2017; 39:209-234. [PMID: 28836681 DOI: 10.1002/elps.201700295] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/15/2017] [Accepted: 08/16/2017] [Indexed: 12/17/2022]
Abstract
The review brings a comprehensive overview of recent developments and applications of high performance capillary and microchip electroseparation methods (zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) to analysis, microscale isolation, purification, and physicochemical and biochemical characterization of peptides in the years 2015, 2016, and ca. up to the middle of 2017. Advances in the investigation of electromigration properties of peptides and in the methodology of their analysis (sample preseparation, preconcentration and derivatization, adsorption suppression and EOF control, and detection) are described. New developments in particular CE and CEC methods are presented and several types of their applications to peptide analysis are reported: qualitative and quantitative analysis, determination in complex (bio)matrices, monitoring of chemical and enzymatical reactions and physical changes, amino acid, sequence and chiral analysis, and peptide mapping of proteins. Some micropreparative peptide separations are shown and capabilities of CE and CEC methods to provide important physicochemical characteristics of peptides are demonstrated.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
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Liu Y, Wang W, Jia M, Liu R, Liu Q, Xiao H, Li J, Xue Y, Wang Y, Yan C. Recent advances in microscale separation. Electrophoresis 2017; 39:8-33. [DOI: 10.1002/elps.201700271] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Yuanyuan Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Weiwei Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Mengqi Jia
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Rangdong Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Qing Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Han Xiao
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Jing Li
- Unimicro (shanghai) Technologies Co., Ltd.; Shanghai P. R. China
| | - Yun Xue
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Yan Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Chao Yan
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
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Davis AN, Travis AR, Miller DR, Cliffel DE. Multianalyte Physiological Microanalytical Devices. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2017; 10:93-111. [PMID: 28605606 PMCID: PMC9235322 DOI: 10.1146/annurev-anchem-061516-045334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Advances in scientific instrumentation have allowed experimentalists to evaluate well-known systems in new ways and to gain insight into previously unexplored or poorly understood phenomena. Within the growing field of multianalyte physiometry (MAP), microphysiometers are being developed that are capable of electrochemically measuring changes in the concentration of various metabolites in real time. By simultaneously quantifying multiple analytes, these devices have begun to unravel the complex pathways that govern biological responses to ischemia and oxidative stress while contributing to basic scientific discoveries in bioenergetics and neurology. Patients and clinicians have also benefited from the highly translational nature of MAP, and the continued expansion of the repertoire of analytes that can be measured with multianalyte microphysiometers will undoubtedly play a role in the automation and personalization of medicine. This is perhaps most evident with the recent advent of fully integrated noninvasive sensor arrays that can continuously monitor changes in analytes linked to specific disease states and deliver a therapeutic agent as required without the need for patient action.
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Affiliation(s)
- Anna Nix Davis
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235;
| | - Adam R Travis
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235;
| | - Dusty R Miller
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235;
| | - David E Cliffel
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235;
- Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, Nashville, Tennessee 37235
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