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Fu H, Tian Y, Zha G, Xiao X, Zhu H, Zhang Q, Yu C, Sun W, Li CM, Wei L, Chen P, Cao C. Microstrip isoelectric focusing with deep learning for simultaneous screening of diabetes, anemia, and thalassemia. Anal Chim Acta 2024; 1312:342696. [PMID: 38834281 DOI: 10.1016/j.aca.2024.342696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/03/2024] [Accepted: 05/06/2024] [Indexed: 06/06/2024]
Abstract
BACKGROUND Hemoglobin (Hb) is an important protein in red blood cells and a crucial diagnostic indicator of diseases, e.g., diabetes, thalassemia, and anemia. However, there is a rare report on methods for the simultaneous screening of diabetes, anemia, and thalassemia. Isoelectric focusing (IEF) is a common separative tool for the separation and analysis of Hb. However, the current analysis of IEF images is time-consuming and cannot be used for simultaneous screening. Therefore, an artificial intelligence (AI) of IEF image recognition is desirable for accurate, sensitive, and low-cost screening. RESULTS Herein, we proposed a novel comprehensive method based on microstrip isoelectric focusing (mIEF) for detecting the relative content of Hb species. There was a good coincidence between the quantitation of Hb via a conventional automated hematology analyzer and the one via mIEF with R2 = 0.9898. Nevertheless, our results showed that the accuracy of disease diagnosis based on the quantification of Hb species alone is as low as 69.33 %, especially for the simultaneous screening of multiple diseases of diabetes, anemia, alpha-thalassemia, and beta-thalassemia. Therefore, we introduced a ResNet1D-based diagnosis model for the improvement of screening accuracy of multiple diseases. The results showed that the proposed model could achieve a high accuracy of more than 90 % and a good sensitivity of more than 96 % for each disease, indicating the overwhelming advantage of the mIEF method combined with deep learning in contrast to the pure mIEF method. SIGNIFICANCE Overall, the presented method of mIEF with deep learning enabled, for the first time, the absolute quantitative detection of Hb, relative quantitation of Hb species, and simultaneous screening of diabetes, anemia, alpha-thalassemia, and beta-thalassemia. The AI-based diagnosis assistant system combined with mIEF, we believe, will help doctors and specialists perform fast and precise disease screening in the future.
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Affiliation(s)
- Haodong Fu
- Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, PR China; School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Youli Tian
- School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China; School of Materials Science and Engineering, Institute for Advanced Materials and Devices, Suzhou University of Science and Technology, Suzhou, 215009, PR China
| | - Genhan Zha
- School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xuan Xiao
- NHC key Laboratory of Thalassemia Medicine, Key Laboratory of Thalassemia Medicine, Chinese Academy of Medical Sciences, Guangxi Key laboratory of Thalassemia Research, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Hengying Zhu
- NHC key Laboratory of Thalassemia Medicine, Key Laboratory of Thalassemia Medicine, Chinese Academy of Medical Sciences, Guangxi Key laboratory of Thalassemia Research, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Qiang Zhang
- School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Changjie Yu
- School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Wei Sun
- Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, PR China
| | - Chang Ming Li
- School of Materials Science and Engineering, Institute for Advanced Materials and Devices, Suzhou University of Science and Technology, Suzhou, 215009, PR China
| | - Li Wei
- Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, 200235, PR China.
| | - Ping Chen
- School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China; NHC key Laboratory of Thalassemia Medicine, Key Laboratory of Thalassemia Medicine, Chinese Academy of Medical Sciences, Guangxi Key laboratory of Thalassemia Research, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China.
| | - Chengxi Cao
- School of Sensing Science and Engineering, SJTU-Biochine Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China; Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, 200235, PR China.
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Liu Q, Chen K, Xu X, Zhang Q, Liang H, Cao C. A facile double moving redox boundary model for visual electrophoresis titration of ascorbic acid. Electrophoresis 2024; 45:639-650. [PMID: 38227365 DOI: 10.1002/elps.202300194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/19/2023] [Accepted: 01/03/2024] [Indexed: 01/17/2024]
Abstract
In this work, we proposed a double moving redox boundary (MROB) model to realize the colorless analyte electrophoresis titration (ET) by the two steps of the redox reaction. Single MROB has been proposed for the development of ET sensing (Analyst, 2013, 138, 1137. ACS Sensor, 2019, 4, 126.), and faces great challenges in detecting the analyte without color change during redox reaction. Herein, a novel model of double-MROB electrophoresis, including its mechanisms, equations, and procedures, was developed for titration by using ascorbic acid as a model analyte. The first MROB was created with ferric iron (Fe3+) and iodide ion (I-) in which Fe3+ was reduced as Fe2+ and I- was oxidized as molecular iodine (I2) used as an indicator of visible MROB due to blue starch-iodine complex. The second boundary was then formed between the molecular iodine and model analyte of ascorbic acid. Under given conditions, there was a quantitative relationship between velocity of MROB (VMROB(ii)) and ascorbic acid concentration (CVit C) in the double-MROB system (1/VMROB(ii) = 0.6502CVit C + 4.5165, and R = 0.9939). The relevant relative standard deviation values of intraday and inter-day were less than ∼5.55% and ∼6.64%, respectively. Finally, the titration of ascorbic acid in chewable vitamin C tablets was performed by the developed method, the titration results agreed with those via the classic iodometric titration. All the results briefly demonstrated the validity of the double MROB model, in which Vit C was used as a model analyte. The developed method had potential use in quantitative analysis of redox-active species in biomedical samples.
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Affiliation(s)
- Qian Liu
- School of Sensing Science and Technology, School of Electronic Information and Electric Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Xi'an Jiao Tong University, Xi'an, P. R. China
| | - Keer Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, P. R. China
| | - Xu Xu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, P. R. China
| | - Qiang Zhang
- School of Sensing Science and Technology, School of Electronic Information and Electric Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Heng Liang
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Xi'an Jiao Tong University, Xi'an, P. R. China
| | - Chengxi Cao
- School of Sensing Science and Technology, School of Electronic Information and Electric Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China
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Sani A, Idrees Khan M, Shah S, Tian Y, Zha G, Fan L, Zhang Q, Cao C. Diagnosis and screening of abnormal hemoglobins. Clin Chim Acta 2024; 552:117685. [PMID: 38030031 DOI: 10.1016/j.cca.2023.117685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/21/2023] [Accepted: 11/24/2023] [Indexed: 12/01/2023]
Abstract
Hemoglobin (Hb) abnormalities, such as thalassemia and structural Hb variants, are among the most prevalent inherited diseases and are associated with significant mortality and morbidity worldwide. However, there were not comprehensive reviews focusing on different clinical analytical techniques, research methods and artificial intelligence (AI) used in clinical screening and research on hemoglobinopathies. Hence the review offers a comprehensive summary of recent advancements and breakthroughs in the detection of aberrant Hbs, research methods and AI uses as well as the present restrictions anddifficulties in hemoglobinopathies. Recent advances in cation exchange high performance liquid chromatography (HPLC), capillary zone electrophoresis (CZE), isoelectric focusing (IEF), flow cytometry, mass spectrometry (MS) and polymerase chain reaction (PCR) etc have allowed for the definitive detection by using advanced AIand portable point of care tests (POCT) integrating with smartphone microscopic classification, machine learning (ML) model, complete blood counts (CBC), imaging-based method, speedy immunoassay, and electrochemical-, microfluidic- and sensing-related platforms. In addition, to confirm and validate unidentified and novel Hbs, highly specialized genetic based techniques like PCR, reverse transcribed (RT)-PCR, DNA microarray, sequencing of genomic DNA, and sequencing of RT-PCR amplified globin cDNA of the gene of interest have been used. Hence, adequate utilization and improvement of available diagnostic and screening technologies are important for the control and management of hemoglobinopathies.
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Affiliation(s)
- Ali Sani
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Muhammad Idrees Khan
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Saud Shah
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Youli Tian
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; School of Life Science and Biotechnology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Genhan Zha
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Liuyin Fan
- Student Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Qiang Zhang
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Chengxi Cao
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; School of Life Science and Biotechnology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, 200240, China.
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Zha G, Xiao X, Tian Y, Zhu H, Chen P, Zhang Q, Yu C, Li H, Wang Y, Cao C. An efficient isoelectric focusing of microcolumn array chip for screening of adult Beta-Thalassemia. Clin Chim Acta 2023; 538:124-130. [PMID: 36400321 DOI: 10.1016/j.cca.2022.10.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 10/26/2022] [Indexed: 11/17/2022]
Abstract
Traditional capillary isoelectric focusing (cIEF), liquid chromatography (LC) and capillary zone electrophoresis (CZE) still suffered from low resolution for hemoglobinopathy screening. Herein, a 30-mm pH 5.2-7.8 microcolumn IEF (mIEF) array chip was developed for hemoglobinopathy screening. As a proof of concept, adult beta-thalassemia was chosen as a model disease. In the method, blood samples were hemolyzed via hemolysin solution and loaded into the microcolumn. The experiments showed that (i) the species of Hb A, F, A2 and variants were clearly separated in the chip, and the resolution was greatly higher than the ones of LC/CZE/cIEF; (ii) up to 24 samples could be simultaneously analyzed in 12-min run; (iii) the intraday and interday RSDs were respectively 3.32-4.91 % and 4.07-5.33 %. The assays of mIEF to total 634 samples were compared with the ones of LC (n = 327) and PCR (n = 307). The cutoff of 3.5 % HbA2 led to the sensitivity of 100 % and specificity of 89.1 % for the mIEF-based screening; and there was 96.7 % coincidence between the methods of mIEF and PCR if refer Hb A2 and F. The method had the merits of facility, efficiency, specificity and sensitivity in contrast to the currently-used methods, implying its potential to screening of beta-thalassemia and hemoglobinopathies.
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Affiliation(s)
- Genhan Zha
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xuan Xiao
- NHC Key Laboratory of Thalassemia Medicine, Key Laboratory of Thalassemia Medicine, Chinese Academy of Medical Sciences, Guangxi Key Laboratory of Thalassemia Research, Guangxi Medical University, Nanning 530021, P. R. China
| | - Youli Tian
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Hengying Zhu
- NHC Key Laboratory of Thalassemia Medicine, Key Laboratory of Thalassemia Medicine, Chinese Academy of Medical Sciences, Guangxi Key Laboratory of Thalassemia Research, Guangxi Medical University, Nanning 530021, P. R. China
| | - Ping Chen
- NHC Key Laboratory of Thalassemia Medicine, Key Laboratory of Thalassemia Medicine, Chinese Academy of Medical Sciences, Guangxi Key Laboratory of Thalassemia Research, Guangxi Medical University, Nanning 530021, P. R. China.
| | - Qiang Zhang
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
| | - Changjie Yu
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Honggen Li
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yuxing Wang
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China; School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Chengxi Cao
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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Stereoselective enrichment and determination of citalopram enantiomers by cation-selective exhaustive injection and sweeping coupled with cyclodextrin modified electrokinetic chromatography. J Chromatogr A 2022; 1669:462951. [PMID: 35303575 DOI: 10.1016/j.chroma.2022.462951] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 11/24/2022]
Abstract
An highly sensitive, rapid and enantioselective method was developed for the enantioseparation and determination of citalopram enantiomers by cation selective exhaustive injection-sweeping-cyclodextrin modified electrokinetic chromatography (CSEI-sweeping-CDEKC). The optimized conditions were: 50 mM pH 3.0 phosphate solution with 25 mg·mL-1 S-β-CD used as background buffer, 50 mbar 300 s hydrodynamical injection of 150 mM pH 3.0 NaH2PO4 buffer followed with 5 s water plug, 10 kV 600 s electrokinetic sample injection, -20 kV CDEKC run. Under the optimized conditions, the resolution was Rs=8.04, the enrichment factor as up to 2163 folds, the LOD values were: 3.6 ng·mL-1 for R-citalopram, 4.1 ng·mL-1 for S-citalopram, and 3 ng·mL-1 for both enantiomers in plasma samples. This new method showed good precision, repeatability and stability, which had been successfully applied to the impurity inspection of escitalopram oxalate and the stereoselective pharmacokinetic study of citalopram enantiomers.
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Zhang F, Ji B, Yan XH, Lv S, Fang F, Zhao S, Guo XL, Wu ZY. Paper-based sample processing for the fast and direct MS analysis of multiple analytes from serum samples. Analyst 2022; 147:4895-4902. [DOI: 10.1039/d2an01261h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The direct MS detection of amino acids obtained from serum was successfully demonstrated via a paper-based fast electrokinetic sample clean-up method.
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Affiliation(s)
- Fu Zhang
- Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Bin Ji
- The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Xiang-Hong Yan
- Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Shuang Lv
- Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Fang Fang
- Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Shuang Zhao
- Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Xiao-Lin Guo
- The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Zhi-Yong Wu
- Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China
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Koukalová L, Glovinová E, Ondračka T, Pospíchal J. Improving the detection limit in capillary isotachophoresis using asymmetric neutralisation reaction boundary. Electrophoresis 2021; 43:417-424. [PMID: 34633678 DOI: 10.1002/elps.202000398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 09/11/2021] [Accepted: 09/25/2021] [Indexed: 11/08/2022]
Abstract
An online method involving transient electrokinetic dosing and ITP with neutralization reaction boundary (NRB) and/or carrier ampholyte-free isoelectric focusing (CAF IEF) was developed for the preconcentration, preseparation, and analytical determination of glyphosate in aqueous samples containing low concentrations of the analyte of interest. Various parameters were investigated in the framework of an optimization study with the aim of achieving the maximum concentration limit of detection (cLOD) decrease in minimum time. The proposed method used CAF IEF and/or ITP with NRB. The sample was dosed to the column on the stationary reaction boundary (CAF IEF) and/or moving reaction boundary (ITP with NRB), whereat a sharp pH step exists. Here, charge reversal was due to the ampholytes, and/or acid accumulation occurred because of charge loss. Similarly, the accumulated sample was mobilized with TE and analyzed using classical ITP in the second analytical column. Glyphosate (GLY), the analyte of interest, was chosen as a model substance for ITP with NRB and preconcentration as well as focusing preconcentration and CAF IEF using the asymmetric purpose-built NRB. On one side of the asymmetric boundary was the zone of acidic pH; while the opposite side comprised a neutral/basic non-conductive zone of the ampholyte-in this case, GLY. Such an arrangement enables the use of a lower pH on the acidic side, which allows the focusing of strongly acidic ampholytes and the accumulation of weak acids. The electrolyte composition and the dosing time were optimized, and a 14-fold accumulation was achieved in 25 min compared to that by classical ITP and a 180-fold accumulation was achieved through CAF IEF and preconcentration with a glyphosate sample. Both methods are simple and can be conducted using all commercial ITP systems.
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Affiliation(s)
- Lenka Koukalová
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Eliška Glovinová
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Tomáš Ondračka
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
| | - Jan Pospíchal
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic
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Zhang Q, Guo Z, Luo F, Xiao H, Liu W, Fan L, Cao C. Model, Simulation, and Experiments on Moving Exchange Boundary via Ligand and Quantum Dots in Chip Electrophoresis. Anal Chem 2021; 93:5360-5364. [PMID: 33754711 DOI: 10.1021/acs.analchem.1c00242] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, the quench model of the moving exchange boundary (MEB) was first created via a ligand of 5,5'-dithiobis(2-nitro-benzoic acid) (DTNB) and group of 3-mercaptopropionic acid (MPA) capped on QDs, and then the recovery model was formed via MPA and 2-nitro-5-thiobenzoic acid (TNB) capped on QDs. The theory on MEB dynamics and width was developed based on the two reversible models, the simulation was conducted for the illumination of MEB, and the protocol was described for the MEB runs. The experiments revealed that (i) the quench model could be created via DTNB and MPA capped on QDs and the recovery one could be in situ formed via MPA and TNB capped on QDs, showing the feasibility of MEB models; (ii) the simulations on MEB dynamics and width were in coincidence with the theoretic predictions, showing the validity of two models; and (iii) the experiments demonstrated the validity of models, predictions, and simulations. The models and theory have potential for development of a biosensor, nanoparticle characterization, separation science, and an affinity assay of ligand-QDs.
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Affiliation(s)
- Qiang Zhang
- Department of Instrument Science and Engineering, School of Electronic Information & Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zehua Guo
- Department of Instrument Science and Engineering, School of Electronic Information & Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fang Luo
- School of Life Science and Biotechnology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hua Xiao
- School of Life Science and Biotechnology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Weiwen Liu
- Department of Instrument Science and Engineering, School of Electronic Information & Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liuyin Fan
- Student Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chengxi Cao
- Department of Instrument Science and Engineering, School of Electronic Information & Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.,School of Life Science and Biotechnology, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200240, China
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Boublík M, Riesová M, Hruška V, Šteflová J. Online preconcentration of weak electrolytes at the pH boundary induced by a system zone in capillary zone electrophoresis. Anal Chim Acta 2019; 1085:126-135. [DOI: 10.1016/j.aca.2019.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 07/28/2019] [Accepted: 08/02/2019] [Indexed: 10/26/2022]
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Saud S, Li G, Kong H, Khan MI, Qiang Z, Sun Y, Liu W, Ding C, Xiao H, Wang Y, Li H, Cao C. Identification of chicken meat quality via rapid array isoelectric focusing with extraction of hemoglobin and myoglobin in meat sample. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1128:121790. [PMID: 31525721 DOI: 10.1016/j.jchromb.2019.121790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/28/2019] [Accepted: 09/06/2019] [Indexed: 02/07/2023]
Abstract
Isoelectric focusing (IEF) has been used for determination of meat quality with high stability analysis. However, it still suffered from time-consuming, laborious and cost-effective performances, e.g., 3 h protein extraction, more than 10 h rehydration time, 5-12 h focusing time, and imaging of protein band. To overcome these issues, a speedy extraction of colorful proteins was developed by controlling extraction and centrifugation of 0.2g sample within 10 min and 15 min respectively; a rapid analytical method was designed by using a quick array IEF with 25 min rehydration, 7 min focusing, 2 min online scanning and imaging of focused proteins. The total analytical time was well controlled within 1 h, significantly less than the traditional IEF time of 24 h. To demonstrate the proposed method, 18 chickens were classified into three groups, e.g., the normal slaughtering, death treatment underwater, and death with infection via the New castle disease (NDV) virus. The experiments demonstrated that two Mb bands with pI 6.8 and 7.4 were present in slaughtered chickens, while four other bands with pI 6.83, 6.95, 7.09, and 7.13 were observed in abnormal chicken. The additional four proteins bands were identified by western blot (WB) as hemoglobin proteins. Furthermore, array Immobilized pH Gradient (IPG) has high sensitivity (absolute LOD of Mb and Hb were 1.3 ng and 5.5 ng), fair stability (RSD values of 2.32%, 2.27%, and 1.69%) for slaughtered, drowned, NDV-infected chickens for intra-day and (2.94%, 1.66%, and 1.07%) for inter-days, and good recovery (100%, 98.25% and 99.75%). Finally, the developed method could be used for the identification of chicken meat quality with less time and small volume reagents consuming.
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Affiliation(s)
- Shah Saud
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guoqing Li
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hao Kong
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Muhammad Idrees Khan
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhang Qiang
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yingjie Sun
- Shanghai Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Shanghai 200241, China
| | - Weiwen Liu
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chan Ding
- Shanghai Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Shanghai 200241, China
| | - Hua Xiao
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yuxing Wang
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Honggen Li
- School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Chengxi Cao
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
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Isoelectric focusing array with immobilized pH gradient and dynamic scanning imaging for diabetes diagnosis. Anal Chim Acta 2019; 1063:178-186. [DOI: 10.1016/j.aca.2019.03.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 03/02/2019] [Accepted: 03/07/2019] [Indexed: 12/24/2022]
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Luo A, Zheng Y, Chen X, Cong F. Undergraduate laboratory experiment on determination of total protein content in milk powder by moving reaction boundary titration. BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION : A BIMONTHLY PUBLICATION OF THE INTERNATIONAL UNION OF BIOCHEMISTRY AND MOLECULAR BIOLOGY 2018; 46:644-651. [PMID: 30387293 DOI: 10.1002/bmb.21177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/27/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
Laboratory exercises focused on protein quantification are frequently conducted in traditional undergraduate biochemistry laboratory curriculum. The laboratory course described here is designed to provide students with experience in measurement of protein content in milk powder by moving reaction boundary titration (MRBT), a new rapid technique for total protein content determination in milk. In addition, this approach is weakly influenced by nonprotein nitrogen reagents such as melamine and urea. The course was done as three weekly laboratory exercises. First, students established a standard curve for milk protein concentration by MRBT method. Then, students investigated the influence of nonprotein nitrogen reagents on MRBT method. Finally, students made a comparison among three different protein quantification methods (MRBT, Biuret, and Kjeldahl method). From the experiments, students grasped the concept and advantages of MRBT and deepened the understanding of protein quantification. This course offer students the opportunity to be exposed to an advanced technique, which may have practical significance to their future study and work in the life science field. © 2018 International Union of Biochemistry and Molecular Biology, 46(6):644-651, 2018.
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Affiliation(s)
- Anling Luo
- Department of Biochemistry and Molecular Biology, School of life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Youli Zheng
- Department of Biochemistry and Molecular Biology, School of life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Xinxin Chen
- Department of Biochemistry and Molecular Biology, School of life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai, China
| | - Fengsong Cong
- Department of Biochemistry and Molecular Biology, School of life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai, China
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13
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Xie SF, Gao H, Niu LL, Xie ZS, Fang F, Wu ZY, Yang FQ. Carrier ampholyte-free isoelectric focusing on a paper-based analytical device for the fractionation of proteins. J Sep Sci 2018; 41:2085-2091. [DOI: 10.1002/jssc.201701438] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/12/2018] [Accepted: 01/12/2018] [Indexed: 01/29/2023]
Affiliation(s)
- Song-Fang Xie
- Research Center for Analytical Science; Chemistry Department; College of Sciences; Northeastern University; Shenyang P. R. China
| | - Han Gao
- Research Center for Analytical Science; Chemistry Department; College of Sciences; Northeastern University; Shenyang P. R. China
| | - Li-Li Niu
- The Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics; Institute of Biophysics; Chinese Academy of Sciences; Beijing P. R. China
| | - Zhen-Sheng Xie
- The Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics; Institute of Biophysics; Chinese Academy of Sciences; Beijing P. R. China
| | - Fang Fang
- Research Center for Analytical Science; Chemistry Department; College of Sciences; Northeastern University; Shenyang P. R. China
| | - Zhi-Yong Wu
- Research Center for Analytical Science; Chemistry Department; College of Sciences; Northeastern University; Shenyang P. R. China
| | - Fu-Quan Yang
- The Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics; Institute of Biophysics; Chinese Academy of Sciences; Beijing P. R. China
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14
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Lubeckyj RA, McCool EN, Shen X, Kou Q, Liu X, Sun L. Single-Shot Top-Down Proteomics with Capillary Zone Electrophoresis-Electrospray Ionization-Tandem Mass Spectrometry for Identification of Nearly 600 Escherichia coli Proteoforms. Anal Chem 2017; 89:12059-12067. [PMID: 29064224 DOI: 10.1021/acs.analchem.7b02532] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Capillary zone electrophoresis-electrospray ionization-tandem mass spectrometry (CZE-ESI-MS/MS) has been recognized as an invaluable platform for top-down proteomics. However, the scale of top-down proteomics using CZE-MS/MS is still limited due to the low loading capacity and narrow separation window of CZE. In this work, for the first time we systematically evaluated the dynamic pH junction method for focusing of intact proteins during CZE-MS. The optimized dynamic pH junction-based CZE-MS/MS approached a 1 μL loading capacity, 90 min separation window, and high peak capacity (∼280) for characterization of an Escherichia coli proteome. The results represent the largest loading capacity and the highest peak capacity of CZE for top-down characterization of complex proteomes. Single-shot CZE-MS/MS identified about 2800 proteoform-spectrum matches, nearly 600 proteoforms, and 200 proteins from the Escherichia coli proteome with spectrum-level false discovery rate (FDR) less than 1%. The number of identified proteoforms in this work is over three times higher than that in previous single-shot CZE-MS/MS studies. Truncations, N-terminal methionine excision, signal peptide removal, and some post-translational modifications including oxidation and acetylation were detected.
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Affiliation(s)
- Rachele A Lubeckyj
- Department of Chemistry, Michigan State University , 578 S Shaw Lane, East Lansing, Michigan 48824, United States
| | - Elijah N McCool
- Department of Chemistry, Michigan State University , 578 S Shaw Lane, East Lansing, Michigan 48824, United States
| | - Xiaojing Shen
- Department of Chemistry, Michigan State University , 578 S Shaw Lane, East Lansing, Michigan 48824, United States
| | - Qiang Kou
- Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis , 719 Indiana Avenue, Indianapolis, Indiana 46202, United States
| | - Xiaowen Liu
- Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis , 719 Indiana Avenue, Indianapolis, Indiana 46202, United States.,Center for Computational Biology and Bioinformatics, Indiana University School of Medicine , 410 W. 10th Street, Indianapolis, Indiana 46202, United States
| | - Liangliang Sun
- Department of Chemistry, Michigan State University , 578 S Shaw Lane, East Lansing, Michigan 48824, United States
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15
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Kong F, Zhang M, Chen J, Fan L, Xiao H, Liu S, Cao C. Continuous protein concentration via free-flow moving reaction boundary electrophoresis. J Chromatogr A 2017; 1508:169-175. [DOI: 10.1016/j.chroma.2017.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 05/31/2017] [Accepted: 06/02/2017] [Indexed: 10/19/2022]
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16
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Pratush A, Zhang Q, Cao YR, Zhang LX, Li GQ, Liu XP, Li J, Jahan S, Cong F, Xiao H, Fan LY, Cao CX. A simple, openable and electroosmotic flow-free PMMA chip for electrophoretic titration of moving reaction boundary. Microchem J 2017. [DOI: 10.1016/j.microc.2016.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Baron D, Dolanská P, Medříková Z, Zbořil R, Petr J. Online stacking of carboxylated magnetite core-shell nanoparticles in capillary electrophoresis. J Sep Sci 2017; 40:2482-2487. [DOI: 10.1002/jssc.201601435] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/20/2017] [Accepted: 03/20/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Daniel Baron
- Regional Centre of Advanced Technologies and Materials; Department of Analytical Chemistry; Faculty of Science, Palacký University in Olomouc; Olomouc Czech Republic
| | - Petra Dolanská
- Regional Centre of Advanced Technologies and Materials; Department of Analytical Chemistry; Faculty of Science, Palacký University in Olomouc; Olomouc Czech Republic
| | - Zdenka Medříková
- Regional Centre of Advanced Technologies and Materials; Department of Physical Chemistry; Faculty of Science, Palacký University in Olomouc; Olomouc Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials; Department of Physical Chemistry; Faculty of Science, Palacký University in Olomouc; Olomouc Czech Republic
| | - Jan Petr
- Regional Centre of Advanced Technologies and Materials; Department of Analytical Chemistry; Faculty of Science, Palacký University in Olomouc; Olomouc Czech Republic
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18
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Zhang Q, Fan LY, Li WL, Cong FS, Zhong R, Chen JJ, He YC, Xiao H, Cao CX. A stable and convenient protein electrophoresis titration device with bubble removing system. Electrophoresis 2017; 38:1706-1712. [PMID: 28306175 DOI: 10.1002/elps.201600472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 03/02/2017] [Accepted: 03/09/2017] [Indexed: 11/10/2022]
Abstract
Moving reaction boundary titration (MRBT) has a potential application to immunoassay and protein content analysis with high selectivity. However, air bubbles often impair the accuracy of MRBT, and the leakage of electrolyte greatly decreases the safety and convenience of electrophoretic titration. Addressing these two issues a reliable MRBT device with modified electrolyte chamber of protein titration was designed. Multiphysics computer simulation was conducted for optimization according to two-phase flow. The single chamber was made of two perpendicular cylinders with different diameters. After placing electrophoretic tube, the resident air in the junction next to the gel could be eliminated by a simple fast electrolyte flow. Removing the electrophoretic tube automatically prevented electrolyte leakage at the junction due to the gravity-induced negative pressure within the chamber. Moreover, the numerical simulation and experiments showed that the improved MRBT device has following advantages: (i) easy and rapid setup of electrophoretic tube within 20 s; (ii) simple and quick bubble dissipates from the chamber of titration within 2 s; (iii) no electrolyte leakage from the two chambers: and (iv) accurate protein titration and safe instrumental operation. The developed technique and apparatus greatly improves the performance of the previous MRBT device, and providing a new route toward practical application.
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Affiliation(s)
- Qiang Zhang
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Liu-Yin Fan
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Wen-Lin Li
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Feng-Song Cong
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Ran Zhong
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Jing-Jing Chen
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Yu-Chen He
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Hua Xiao
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Cheng-Xi Cao
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, P.R. China
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19
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Dutta D. Broadening of analyte streams due to a transverse pressure gradient in free-flow isoelectric focusing. J Chromatogr A 2017; 1484:85-92. [PMID: 28081900 PMCID: PMC5316482 DOI: 10.1016/j.chroma.2017.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/31/2016] [Accepted: 01/02/2017] [Indexed: 01/24/2023]
Abstract
Pressure-driven cross-flows can arise in free-flow isoelectric focusing systems (FFIEF) due to a non-uniform electroosmotic flow velocity along the channel width induced by the pH gradient in this direction. In addition, variations in the channel cross-section as well as unwanted differences in hydrostatic heads at the buffer/sample inlet ports can also lead to such pressure-gradients which besides altering the equilibrium position of the sample zones have a tendency to substantially broaden their widths deteriorating the separations. In this situation, a thorough assessment of stream broadening due to transverse pressure-gradients in FFIEF devices is necessary in order to establish accurate design rules for the assay. The present article describes a mathematical framework to estimate the noted zone dispersion in FFIEF separations based on the method-of-moments approach under laminar flow conditions. A closed-form expression has been derived for the spatial variance of the analyte streams at their equilibrium positions as a function of the various operating parameters governing the assay performance. This expression predicts the normalized stream variance under the chosen conditions to be determined by two dimensionless Péclet numbers evaluated based on the transverse pressure-driven and electrophoretic solute velocities in the separation chamber, respectively. Moreover, the analysis shows that while the stream width can be expected to increase with an increase in the value of the first Péclet number, the opposite trend will be followed with respect to the latter. The noted results have been validated using Monte Carlo simulations that also establish a time/length scale over which the predicted equilibrium stream width is attained in the system.
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Affiliation(s)
- Debashis Dutta
- Department of Chemistry, University of Wyoming, Laramie, WY, 82071, United States.
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20
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Ouyang L, Liu Q, Liang H. Combining field-amplified sample stacking with moving reaction boundary electrophoresis on a paper chip for the preconcentration and separation of metal ions. J Sep Sci 2017; 40:789-797. [DOI: 10.1002/jssc.201600804] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 11/14/2016] [Accepted: 11/14/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Liangfei Ouyang
- Separation Science Institute, the Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology; Xi'an Jiaotong University; Xi'an P. R. China
- State Key Laboratory for Manufacturing Systems Engineering; Xi'an Jiaotong University; Xi'an P. R. China
| | - Qian Liu
- Separation Science Institute, the Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology; Xi'an Jiaotong University; Xi'an P. R. China
| | - Heng Liang
- Separation Science Institute, the Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology; Xi'an Jiaotong University; Xi'an P. R. China
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21
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Chen D, Shen X, Sun L. Capillary zone electrophoresis–mass spectrometry with microliter-scale loading capacity, 140 min separation window and high peak capacity for bottom-up proteomics. Analyst 2017; 142:2118-2127. [DOI: 10.1039/c7an00509a] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
CZE–MS can approach a microliter-scale loading capacity and a 140 min separation window for large-scale bottom-up proteomics.
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Affiliation(s)
- Daoyang Chen
- Department of Chemistry
- Michigan State University
- East Lansing
- USA 48824
| | - Xiaojing Shen
- Department of Chemistry
- Michigan State University
- East Lansing
- USA 48824
| | - Liangliang Sun
- Department of Chemistry
- Michigan State University
- East Lansing
- USA 48824
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22
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Zhong R, Xie H, Kong F, Zhang Q, Jahan S, Xiao H, Fan L, Cao C. Enzyme catalysis-electrophoresis titration for multiplex enzymatic assay via moving reaction boundary chip. LAB ON A CHIP 2016; 16:3538-3547. [PMID: 27464600 DOI: 10.1039/c6lc00757k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we developed the concept of enzyme catalysis-electrophoresis titration (EC-ET) under ideal conditions, the theory of EC-ET for multiplex enzymatic assay (MEA), and a related method based on a moving reaction boundary (MRB) chip with a collateral channel and cell phone imaging. As a proof of principle, the model enzymes horseradish peroxidase (HRP), laccase and myeloperoxidase (MPO) were chosen for the tests of the EC-ET model. The experiments revealed that the EC-ET model could be achieved via coupling EC with ET within a MRB chip; particularly the MEA analyses of catalysis rate, maximum rate, activity, Km and Kcat could be conducted via a single run of the EC-ET chip, systemically demonstrating the validity of the EC-ET theory. Moreover, the developed method had these merits: (i) two orders of magnitude higher sensitivity than a fluorescence microplate reader, (ii) simplicity and low cost, and (iii) fairly rapid (30 min incubation, 20 s imaging) analysis, fair stability (<5.0% RSD) and accuracy, thus validating the EC-ET method. Finally, the developed EC-ET method was used for the clinical assay of MPO activity in blood samples; the values of MPO activity detected via the EC-ET chip were in agreement with those obtained by a traditional fluorescence microplate reader, indicating the applicability of the EC-ET method. The work opens a window for the development of enzymatic research, enzyme assay, immunoassay, and point-of-care testing as well as titration, one of the oldest methods of analysis, based on a simple chip.
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Affiliation(s)
- Ran Zhong
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China. ,
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23
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Zhu G, Sun L, Dovichi NJ. Dynamic pH junction preconcentration in capillary electrophoresis- electrospray ionization-mass spectrometry for proteomics analysis. Analyst 2016; 141:5216-20. [PMID: 27460877 DOI: 10.1039/c6an01140c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Capillary zone electrophoresis (CZE)-electrospray ionization (ESI)-mass spectrometry (MS) is an interesting complimentary technique to reversed phase liquid chromatography (RPLC)-ESI-MS for proteomics research. However, the low sample loading capacity of CZE (typically a few nL) can limit its application for large-scale proteomics. A number of on-line sample preconcentration methods have been developed to increase sample loading volumes. This review considers the dynamic pH junction as a simple on-line sample preconcentration method; this method is well suited for amphiprotic analytes. In the pH junction, these analytes are suspended in a basic buffer, injected by pressure into the capillary, and separated in an acidic background electrolyte, with no changes in either CZE-MS operations or instrumentation. We have demonstrated that the dynamic pH junction method can improve the sample loading volume to sub-μL volumes without significant loss of separation capacity for bottom-up proteomic analysis. The dynamic pH junction based CZE-ESI-MS system has been applied for a number of complex biological samples, including the E. coli proteome, impurities in recombinant antibody therapeutics, and the characterization of the phosphoproteome from a human cell line.
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Affiliation(s)
- Guijie Zhu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
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24
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Charge-based separation of proteins and peptides by electrically induced dynamic pH profiles. J Chromatogr A 2016; 1431:166-175. [DOI: 10.1016/j.chroma.2015.12.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 12/27/2015] [Accepted: 12/28/2015] [Indexed: 12/27/2022]
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25
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Zhang LX, Cao YR, Xiao H, Liu XP, Liu SR, Meng QH, Fan LY, Cao CX. Leverage principle of retardation signal in titration of double protein via chip moving reaction boundary electrophoresis. Biosens Bioelectron 2015; 77:284-91. [PMID: 26414025 DOI: 10.1016/j.bios.2015.09.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Revised: 08/28/2015] [Accepted: 09/01/2015] [Indexed: 12/17/2022]
Abstract
In the present work we address a simple, rapid and quantitative analytical method for detection of different proteins present in biological samples. For this, we proposed the model of titration of double protein (TDP) and its relevant leverage theory relied on the retardation signal of chip moving reaction boundary electrophoresis (MRBE). The leverage principle showed that the product of the first protein content and its absolute retardation signal is equal to that of the second protein content and its absolute one. To manifest the model, we achieved theoretical self-evidence for the demonstration of the leverage principle at first. Then relevant experiments were conducted on the TDP-MRBE chip. The results revealed that (i) there was a leverage principle of retardation signal within the TDP of two pure proteins, and (ii) a lever also existed within these two complex protein samples, evidently demonstrating the validity of TDP model and leverage theory in MRBE chip. It was also showed that the proposed technique could provide a rapid and simple quantitative analysis of two protein samples in a mixture. Finally, we successfully applied the developed technique for the quantification of soymilk in adulterated infant formula. The TDP-MRBE opens up a new window for the detection of adulteration ratio of the poor food (milk) in blended high quality one.
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Affiliation(s)
- Liu-Xia Zhang
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yi-Ren Cao
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hua Xiao
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiao-Ping Liu
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shao-Rong Liu
- Department of Chemistry and Biochemistry, Oklahoma University, Norman, OK 73019, USA
| | - Qing-Hua Meng
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liu-Yin Fan
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; Department of Chemistry and Biochemistry, Oklahoma University, Norman, OK 73019, USA.
| | - Cheng-Xi Cao
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
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26
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Guo CG, Shang Z, Yan J, Li S, Li GQ, Liu RZ, Qing Y, Fan LY, Xiao H, Cao CX. A tunable isoelectric focusing via moving reaction boundary for two-dimensional gel electrophoresis and proteomics. Talanta 2015; 137:197-203. [PMID: 25770625 DOI: 10.1016/j.talanta.2015.01.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/22/2015] [Accepted: 01/25/2015] [Indexed: 11/19/2022]
Abstract
Routine native immobilized pH gradient isoelectric focusing (IPG-IEF) and two-dimensional gel electrophoresis (2DE) are still suffering from unfortunate reproducibility, poor resolution (caused by protein precipitation) and instability in characterization of intact protein isoforms and posttranslational modifications. Based on the concept of moving reaction boundary (MRB), we firstly proposed a tunable non-IPG-IEF system to address these issues. By choosing proper pairs of catholyte and anolyte, we could achieve desired cathodic and anodic migrating pH gradients in non-IPG-IEF system, effectively eliminating protein precipitation and uncertainty of quantitation existing in routine IEF and 2DE, and enhancing the resolution and sensitivity of IEF. Then, an adjustable 2DE system was developed by combining non-IPG-IEF with polyacrylamide gel electrophoresis (PAGE). The improved 2DE was evaluated by testing model proteins and colon cancer cell lysates. The experiments revealed that (i) a tunable pH gradient could be designed via MRB; (ii) up to 1.65 fold improvement of resolution was achieved via non-IPG-IEF; (iii) the sensitivity of developed techniques was increased up to 2.7 folds; and (iv) up to about 16.4% more protein spots could be observed via the adjustable 2DE as compared with routine one. The developed techniques might contribute to complex proteome research, especially for screening of biological marker and analysis of extreme acidic/alkaline proteins.
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Affiliation(s)
- Chen-Gang Guo
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhi Shang
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jian Yan
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Si Li
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guo-Qing Li
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Rong-Zhong Liu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ying Qing
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liu-Yin Fan
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hua Xiao
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Cheng-Xi Cao
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
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27
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Pirmoradian M, Zhang B, Chingin K, Astorga-Wells J, Zubarev RA. Membrane-Assisted Isoelectric Focusing Device As a Micropreparative Fractionator for Two-Dimensional Shotgun Proteomics. Anal Chem 2014; 86:5728-32. [DOI: 10.1021/ac404180e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammad Pirmoradian
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheelesväg 2, SE-17177 Stockholm, Sweden
- Biomotif AB, Stockholm, Sweden
| | - Bo Zhang
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheelesväg 2, SE-17177 Stockholm, Sweden
| | - Konstantin Chingin
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheelesväg 2, SE-17177 Stockholm, Sweden
| | - Juan Astorga-Wells
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheelesväg 2, SE-17177 Stockholm, Sweden
- Biomotif AB, Stockholm, Sweden
| | - Roman A. Zubarev
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheelesväg 2, SE-17177 Stockholm, Sweden
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28
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Naydenov CL, Kirazov EP, Mitev VI. Generalized Physicochemical Model for the Natural pH Gradient in Classic IEF. Chromatographia 2014. [DOI: 10.1007/s10337-014-2644-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Kitagawa F, Otsuka K. Recent applications of on-line sample preconcentration techniques in capillary electrophoresis. J Chromatogr A 2014; 1335:43-60. [DOI: 10.1016/j.chroma.2013.10.066] [Citation(s) in RCA: 137] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/18/2013] [Accepted: 10/21/2013] [Indexed: 12/21/2022]
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30
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Wang H, Shi Y, Yan J, Dong J, Li S, Xiao H, Xie H, Fan LY, Cao CX. Retardation Signal for Fluorescent Determination of Total Protein Content via Rapid and Sensitive Chip Moving Reaction Boundary Electrophoretic Titration. Anal Chem 2014; 86:2888-94. [DOI: 10.1021/ac403963f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Houyu Wang
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yongting Shi
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jian Yan
- Institute of Refrigeration
and Cryogenics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jingyu Dong
- School
of Chemistry and Molecule Engineering, East China University of Science and Technology, Shanghai 200234, China
| | - Si Li
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hua Xiao
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- School
of Chemistry and Chemical Engieering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haiyang Xie
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- School
of Chemistry and Chemical Engieering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liu-Yin Fan
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- School
of Chemistry and Chemical Engieering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cheng-Xi Cao
- Laboratory of
Bioseparation and Analytical Biochemistry, State Key Laboratory of
Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- School
of Chemistry and Chemical Engieering, Shanghai Jiao Tong University, Shanghai 200240, China
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31
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OuYang L, Wang C, Du F, Zheng T, Liang H. Electrochromatographic separations of multi-component metal complexes on a microfluidic paper-based device with a simplified photolithography. RSC Adv 2014. [DOI: 10.1039/c3ra43625j] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Li S, Dong JY, Guo CG, Wu YX, Zhang W, Fan LY, Cao CX, Zhang WB. A stable and high-resolution isoelectric focusing capillary array device for micropreparative separation of proteins. Talanta 2013; 116:259-65. [DOI: 10.1016/j.talanta.2013.05.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 05/16/2013] [Accepted: 05/19/2013] [Indexed: 12/13/2022]
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33
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FAN Y, LI S, FAN L, CAO C. Trace analysis of heavy metal ions in electroplate waste water by capillary electrophoresis with visual offline sample stacking via moving neutralization boundary. Se Pu 2013; 30:827-31. [DOI: 10.3724/sp.j.1123.2012.04003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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34
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Zhang W, Guo CG, Fan LY, Cao CX. Theoretical and experimental studies on isotachophoresis in multi-moving chelation boundary system formed with metal ions and EDTA. Analyst 2013; 138:5039-51. [PMID: 23806973 DOI: 10.1039/c3an00643c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, a general mode and theory of moving chelation boundary based isotachophoresis (MCB-based ITP), together with the concept of decisive metal ion (DMI) having the maximum complexation constant (lg Kmax) with the chelator, were developed from a multi-MCB (mMCB) system. The theoretical deductions were: (i) the reaction boundary velocities in the mMCB system at steady state were equal to each other, resulting in a novel MCB-based ITP separation of metal ions; (ii) the boundary directions and velocities in the system were controlled by the fluxes of chelator and DMI, rather than other metal ions; and (iii) a controllable stacking of metal ions could be simultaneously achieved in the developed system. To demonstrate the deductions, a series of experiments were conducted by using model chelator of EDTA and metal ions of Cu(II) and Co(II) due to characteristic colors of blue [Cu-EDTA](2-) and pink [Co-EDTA](2-) complexes. The experiments demonstrated the correctness of theoretical deductions, indicating the validity of the developed model and theory of ITP. These findings provide guidance for the development of MRB-based ITP separation and stacking of metal ions in biological sample matrix and heavy metal ions in environmental samples.
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Affiliation(s)
- Wei Zhang
- Laboratory of Bioseparation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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35
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Novel moving reaction boundary-induced stacking and separation of human hemoglobins in slab polyacrylamide gel electrophoresis. Anal Bioanal Chem 2013; 405:8587-95. [PMID: 23912834 DOI: 10.1007/s00216-013-7258-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 06/18/2013] [Accepted: 07/12/2013] [Indexed: 10/26/2022]
Abstract
We developed a novel polyacrylamide gel electrophoresis (PAGE) method to stack and separate human hemoglobins (Hbs) based on the concept of moving reaction boundary (MRB). This differs from the classic isotachophoresis (ITP)-based stacking PAGE in the aspect of buffer composition, including the electrode buffer (pH 8.62 Tris-Gly), sample buffer (pH 6.78 Tris-Gly), and separation buffer (pH 8.52 Tris-Gly). In the MRB-PAGE system, a transient MRB was formed between alkaline electrode buffer and acidic sample buffer, being designed to move toward the anode. Hbs carried partial positive charges in the sample buffer due to its pH below pI values of Hbs, resulting in electromigrating to the cathode. Hbs would carry negative charges quickly when migrated into the alkaline electrode buffer and be transported to the anode until meeting the sample buffer again. Thus, Hbs were stacked within a MRB until the transient MRB reached the separation buffer and then separated by zone electrophoresis with molecular sieve effect of the gel. The experimental results demonstrated that there were three clear and sharp protein zones of Hbs (HbA1c, HbA0, and HbA2) in MRB-PAGE, in contrast to only one protein zone (HbA0) in ITP-PAGE for large-volume loading (≥15 μl), indicating high stacking efficiency, separation resolution, and good sensitivity of MRB-PAGE. In addition, MRB-PAGE was performed in a conventional slab PAGE device, requiring no special device. Thus, it could be widely used in separation and analysis of diluted protein in a standard laboratory.
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36
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Guo CG, Li S, Wang HY, Zhang D, Li GQ, Zhang J, Fan LY, Cao CX. Study on stability mechanism of immobilized pH gradient in isoelectric focusing via the Svensson–Tiselius differential equation and moving reaction boundary. Talanta 2013; 111:20-7. [DOI: 10.1016/j.talanta.2013.03.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Revised: 03/07/2013] [Accepted: 03/10/2013] [Indexed: 01/05/2023]
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37
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Breadmore MC, Shallan AI, Rabanes HR, Gstoettenmayr D, Abdul Keyon AS, Gaspar A, Dawod M, Quirino JP. Recent advances in enhancing the sensitivity of electrophoresis and electrochromatography in capillaries and microchips (2010-2012). Electrophoresis 2013; 34:29-54. [PMID: 23161056 DOI: 10.1002/elps.201200396] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 09/03/2012] [Accepted: 09/04/2012] [Indexed: 12/21/2022]
Abstract
CE has been alive for over two decades now, yet its sensitivity is still regarded as being inferior to that of more traditional methods of separation such as HPLC. As such, it is unsurprising that overcoming this issue still generates much scientific interest. This review continues to update this series of reviews, first published in Electrophoresis in 2007, with updates published in 2009 and 2011 and covers material published through to June 2012. It includes developments in the field of stacking, covering all methods from field amplified sample stacking and large volume sample stacking, through to isotachophoresis, dynamic pH junction and sweeping. Attention is also given to online or inline extraction methods that have been used for electrophoresis.
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Affiliation(s)
- Michael C Breadmore
- Australian Centre for Research on Separation Science, School of Chemistry, University of Tasmania, Hobart, Tasmania, Australia.
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38
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Ge S, Tang W, Han R, Zhu Y, Wang Q, He P, Fang Y. Sensitive analysis of aminoglycoside antibiotics via hyphenation of transient moving substitution boundary with field-enhanced sample injection in capillary electrophoresis. J Chromatogr A 2013; 1295:128-35. [DOI: 10.1016/j.chroma.2013.04.049] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 03/31/2013] [Accepted: 04/16/2013] [Indexed: 10/26/2022]
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39
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Dong J, Li S, Wang H, Meng Q, Fan L, Xie H, Cao C, Zhang W. Simple Boric Acid-Based Fluorescent Focusing for Sensing of Glucose and Glycoprotein via Multipath Moving Supramolecular Boundary Electrophoresis Chip. Anal Chem 2013; 85:5884-91. [DOI: 10.1021/ac400642d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jingyu Dong
- Laboratory of Analytical Biochemistry and Bioseparation, State Key
Laboratory of Microbial Metabolism, and School of Life Science and
Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai
200237, China
| | - Si Li
- Laboratory of Analytical Biochemistry and Bioseparation, State Key
Laboratory of Microbial Metabolism, and School of Life Science and
Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Houyu Wang
- Laboratory of Analytical Biochemistry and Bioseparation, State Key
Laboratory of Microbial Metabolism, and School of Life Science and
Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qinghua Meng
- School of Chemistry
and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liuyin Fan
- Laboratory of Analytical Biochemistry and Bioseparation, State Key
Laboratory of Microbial Metabolism, and School of Life Science and
Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haiyang Xie
- Laboratory of Analytical Biochemistry and Bioseparation, State Key
Laboratory of Microbial Metabolism, and School of Life Science and
Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chengxi Cao
- Laboratory of Analytical Biochemistry and Bioseparation, State Key
Laboratory of Microbial Metabolism, and School of Life Science and
Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Weibing Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai
200237, China
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40
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Li S, Guo CG, Chen L, Yin XY, Wu YX, Fan LY, Fan HZ, Cao CX. Impact of glutathione-HbA1c on HbA1c measurement in diabetes diagnosis via array isoelectric focusing, liquid chromatography, mass spectrometry and ELISA. Talanta 2013; 115:323-8. [PMID: 24054598 DOI: 10.1016/j.talanta.2013.05.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 05/16/2013] [Accepted: 05/19/2013] [Indexed: 11/30/2022]
Abstract
Hemoglobin A1c (HbA1c) has been proven to be a key biomarker for diabetes screening, and glutathiolation of HbA1c (viz., GSS-HbA1c) has been identified. However, the impact of GSS-HbA1c on the measurement of HbA1c for diabetes screening has not been quantitatively assessed yet. To address the issue, the micropreparative capillary isoelectric focusing (cIEF) developed in our previous work was used for the high resolution separation and purification of hemoglobin (Hb) species. The main fractions of HbA0, HbA3 and HbA1c extracted from the developed cIEF were identified by validated Mono S method. The proposed GSS-HbA1c fractions in the cIEF were pooled and identified by electrospray ionization mass spectrometry (ESI-MS). The HbA1c enzyme-linked immunosorbent assay (ELISA) kit was employed for further quantitative analysis of GSS-HbA1c. A total of 34 blood samples with HbA1c levels from 4.2% to 13.4% were assessed via the above comprehensive strategy of IEF-HPLC-MS-ELISA. It was demonstrated that the HbA1c levels detected by cation exchange LC were considerably influenced by the glutathiolation of Hb and the range of detected GSS-HbA1c values was between 0.23% and 0.74%. The results and developed cIEF methods have considerable significances for investigation of diabetes and clinical diagnosis.
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Affiliation(s)
- Si Li
- Laboratory of Bio-separation and Analytical Biochemistry, State Key Laboratory of Microbial Metabolism, and School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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41
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Guo CY, Wang HY, Liu XP, Fan LY, Zhang L, Cao CX. Fast and selective determination of total protein in milk powder via titration of moving reaction boundary electrophoresis. Electrophoresis 2013; 34:1343-51. [DOI: 10.1002/elps.201300007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 02/18/2013] [Accepted: 02/18/2013] [Indexed: 11/07/2022]
Affiliation(s)
| | - Hou-yu Wang
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Xiao-Ping Liu
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Liu-yin Fan
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Lei Zhang
- School of Environment and Chemistry; Shanghai Normal University; Shanghai; China
| | - Cheng-xi Cao
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
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42
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A visual detection of protein content based on titration of moving reaction boundary electrophoresis. Anal Chim Acta 2013; 774:92-9. [DOI: 10.1016/j.aca.2013.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/20/2013] [Accepted: 03/03/2013] [Indexed: 11/21/2022]
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43
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Recent advances in on-line concentration and separation of amino acids using capillary electrophoresis. Anal Bioanal Chem 2013; 405:7919-30. [DOI: 10.1007/s00216-013-6906-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 02/23/2013] [Accepted: 03/08/2013] [Indexed: 11/25/2022]
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44
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Xie HY, Liu Q, Li JH, Fan LY, Cao CX. Model creation of moving redox reaction boundary in agarose gel electrophoresis by traditional potassium permanganate method. Analyst 2013; 138:1137-40. [DOI: 10.1039/c2an36373a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Zhang J, Yan J, Li S, Pang B, Guo CG, Cao CX, Jin XQ. Mathematical model and dynamic computer simulation on free flow zone electrophoresis. Analyst 2013; 138:5734-44. [DOI: 10.1039/c3an00834g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Wang HY, Li S, Tang YY, Dong JY, Fan LY, Cao CX. Determination of free acidic and alkaline residues of protein via moving reaction boundary titration in microdevice electrophoresis. Analyst 2013; 138:3544-51. [DOI: 10.1039/c3an36494a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Mathematical model and computer simulation on moving precipitate boundary electrophoresis for offline sample pre- concentration of heavy metal ion. Talanta 2013. [DOI: 10.1016/j.talanta.2012.10.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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48
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Review of recent developments of on-line sample stacking techniques and their application in capillary electrophoresis. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0007-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
AbstractCapillary electrophoresis (CE) has become one of the most useful tools in separation science because of its high separation efficiency, low cost, versatility, ease of sample preparation and automation. However, some limitations of CE, such as poor concentration sensitivity due to its lower sample loading and shorter optical path length, limits its further applications in separation science. In order to solve this problem, various on-line sample preconcentration techniques such as transient isotachophoresis preconcentration, field-enhanced sample stacking, micelle to solvent stacking, micelle collapse, dynamic pH junction, sweeping, solid phase extraction, single drop microextraction and liquid phase microextraction have been combined with CE. Recent developments, applications and some variants together with different combinations of these techniques integrating in CE are reviewed here and our discussions will be confined to the past three years (2008–2011).
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49
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Fan Y, Li S, Fan L, Cao C. Visual offline sample stacking via moving neutralization boundary electrophoresis for analysis of heavy metal ion. Talanta 2012; 95:42-9. [DOI: 10.1016/j.talanta.2012.03.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 03/16/2012] [Accepted: 03/22/2012] [Indexed: 11/24/2022]
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50
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Li T, Booker CJ, Yeung KKC. Migration behaviour of discontinuous buffers in capillary electrophoresis during protein enrichment. Analyst 2012; 137:4766-73. [DOI: 10.1039/c2an35548e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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