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Wang ST, Sun MF, Gao H, Shen BB, Fang WJ. Monitoring of low-molecular-weight protein aggregation by CE-SDS as a complementary method to SE-HPLC. J Pharm Biomed Anal 2023; 234:115521. [PMID: 37327620 DOI: 10.1016/j.jpba.2023.115521] [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: 03/11/2023] [Revised: 06/04/2023] [Accepted: 06/08/2023] [Indexed: 06/18/2023]
Abstract
Capillary electrophoresis with sodium dodecyl sulfate (CE-SDS) has long been proven to have excellent performance in the analysis and characterization of therapeutic proteins. However, it is rarely used for the detection of low-molecular-weight proteins or peptides. Our research has proved the ability of CE-SDS to characterize the purity of low-molecular-weight proteins (i.e., <10 kDa) and even polypeptides. In this article, insulin glargine was used as a model protein, and CE-SDS was used to analyze the samples damaged by heating and light exposure. The monomers, dimers, and trimers of insulin glargine were effectively separated, and the results of the mass spectrometry also confirmed the existence of two kinds of insulin aggregates. For comparison, the size-exclusion high-performance liquid chromatography (SE-HPLC) only showed a single aggregate peak. In addition, the denaturation conditions caused only the covalent aggregates to appear in the CE-SDS analysis. These advantages also make CE-SDS an excellent supplementary technology to the traditional SE-HPLC, providing biopharmaceutical analysts with more information.
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Affiliation(s)
- Si-Tao Wang
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Min-Fei Sun
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou 310016, China
| | - Han Gao
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou 310016, China
| | - Bin-Bin Shen
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou 310016, China
| | - Wei-Jie Fang
- Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou 310016, China; Innovation Center of Translational Pharmacy, Jinhua Institute of Zhejiang University, Jinhua 321000, China; Research Institute of Zhejiang University-Taizhou, Taizhou 317000, China.
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Chung M, Kim D, Herr AE. Polymer sieving matrices in microanalytical electrophoresis. Analyst 2014; 139:5635-54. [DOI: 10.1039/c4an01179a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Cheng KC, Demirci A, Catchmark JM. Pullulan: biosynthesis, production, and applications. Appl Microbiol Biotechnol 2011; 92:29-44. [DOI: 10.1007/s00253-011-3477-y] [Citation(s) in RCA: 274] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/28/2011] [Accepted: 07/13/2011] [Indexed: 11/25/2022]
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Sumitomo K, Mayumi K, Yokoyama H, Sakai Y, Minamikawa H, Masuda M, Shimizu T, Ito K, Yamaguchi Y. Dynamic light-scattering measurement of sieving polymer solutions for protein separation on SDS CE. Electrophoresis 2009; 30:3607-12. [DOI: 10.1002/elps.200900255] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Oliver G, Simpson C, Kerby MB, Tripathi A, Chauhan A. Electrophoretic migration of proteins in semidilute polymer solutions. Electrophoresis 2008; 29:1152-63. [PMID: 18246577 DOI: 10.1002/elps.200700756] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We present a systematic study of the electrophoretic migration of 10-200 kDa protein fragments in dilute-polymer solutions using microfluidic chips. The electrophoretic mobility and dispersion of protein samples were measured in a series of monodisperse polydimethylacrylamide (PDMA) polymers of different molecular masses (243, 443, and 764 kDa, polydispersivity index <2) of varying concentration. The polymer solutions were characterized using rheometry. Prior to loading onto the microchip, the polymer solution was mixed with known concentrations of SDS (SDS) surfactant and a staining dye. SDS-denatured protein samples were electrokinetically injected, separated, and detected in the microchip using electric fields ranging from 100 to 300 V/cm. Our results show that the electrophoretic mobility of protein fragments decreases exponentially with the concentration c of the polymer solution. The mobility was found to decrease logarithmically with the molecular weight of the protein fragment. In addition, the mobility was found to be independent of the electric field in the separation channel. The dispersion is relatively independent of polymer concentration and it first increases with protein size and then decreases with a maximum at about 45 kDa. The resolution power of the device decreases with concentration of the PDMA solution but it is always better than 10% of the protein size. The protein migration does not seem to correspond to the Ogston or the reptation models. A semiempirical expression for mobility given by van Winkle fits the data very well.
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Affiliation(s)
- Gloria Oliver
- Division of Engineering and Medical Science, Brown University, Providence, RI 02912, USA
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OKADA H, KAJI N, TOKESHI M, BABA Y. Poly(methylmethacrylate) Microchip Electrophoresis of Proteins Using Linear-poly(acrylamide) Solutions as Separation Matrix. ANAL SCI 2008; 24:321-5. [DOI: 10.2116/analsci.24.321] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hiroki OKADA
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
| | - Noritada KAJI
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
- MEXT Innovative Research Center for Preventive Medical Engineering, Nagoya University
| | - Manabu TOKESHI
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
- MEXT Innovative Research Center for Preventive Medical Engineering, Nagoya University
| | - Yoshinobu BABA
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
- MEXT Innovative Research Center for Preventive Medical Engineering, Nagoya University
- Plasma Nanotechnology Research Center, Nagoya University
- National Institute of Advanced Industrial Science and Technology (AIST)
- Institute for Molecular Science, National Institutes of Natural Sciences
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Miksík I, Sedláková P, Mikulíková K, Eckhardt A, Cserhati T, Horváth T. Matrices for capillary gel electrophoresis—a brief overview of uncommon gels. Biomed Chromatogr 2006; 20:458-65. [PMID: 16779791 DOI: 10.1002/bmc.640] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This article gives an overview of uncommon replaceable matrices (gels) for capillary gel electrophoresis. This electrophoretic technique is useful mainly for the separation and analysis of biopolymers-nucleic acids and their fragments, and proteins/peptides. Commonly used gels are not reviewed. Those mentioned and discussed here are gels containing saccharides, newly developed acrylamide-based gels and thermoadjustable viscosity polymers, namely triblock copolymers and grafted polyacrylamide.
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Affiliation(s)
- Ivan Miksík
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague.
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Corradini D. Buffer additives other than the surfactant sodium dodecyl sulfate for protein separations by capillary electrophoresis. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1997; 699:221-56. [PMID: 9392377 DOI: 10.1016/s0378-4347(97)00301-0] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The different compounds utilized as additives to the electrolyte solutions employed in protein capillary zone electrophoresis (CZE) for minimizing protein-capillary wall interactions, for improving selectivity and resolution and for controlling the electroosmotic flow are reviewed. The dependence of the electroosmotic flow on the different variables that can be affected by the incorporation of an additive into the electrolytic solution is discussed. A list of the most effective additives employed for protein separations by CZE is reported in Appendix A.
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Affiliation(s)
- D Corradini
- Istituto di Cromatografia del CNR Area della Ricerca di Roma, Rome, Italy
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