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Akbarzadehlaleh P, Mirzaei M, Mashahdi-Keshtiban M, Heidari HR. The Effect of Length and Structure of Attached Polyethylene Glycol Chain on Hydrodynamic Radius, and Separation of PEGylated Human Serum Albumin by Chromatography. Adv Pharm Bull 2021; 11:728-738. [PMID: 34888220 PMCID: PMC8642789 DOI: 10.34172/apb.2021.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 04/28/2020] [Accepted: 08/05/2020] [Indexed: 11/09/2022] Open
Abstract
Purpose: This study focuses on the effect of length and structure of attached polyethylene glycol (PEG) chain on hydrodynamic radius (Rh ) and chromatographic retention of PEGylated protein. To this aim human serum albumin (HSA) as a standard protein was PEGylated site specifically with mPEG-maleimide. Methods: Separated PEG_HSA fractions were analyzed by size exclusion and anion exchange chromatography (AExC). The purity of fractions and the relative mobility of PEGylated and native proteins were analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Hydrodynamic radius was determined based on the retention time of fractions on size exclusion chromatography (SEC), and also according to the previously reported equations. Results: A linear relation was shown between the molecular weight of attached PEG and Rh of PEGylated HSA. No significant difference between Rh of proteins modified with linear and branched PEG was shown. In SDS-PAGE, the delaying effect of branched PEG on movement of PEGylated protein was higher than that of linear PEG. Conclusion: As PEGylated HSA and dimer HSA have almost the same size and in SEC they elute at very close retention times, so in this case ion exchange chromatography (IExC) is more effective than SEC in separation of PEGylated HSA. Branched PEG- HSA showed earlier elution on anion exchange chromatography compared to linear PEG-HSA, that this can explain the different shielding effect of various structures of attached PEGs. The smaller size of PEGylated HSA in compare to the sum of the hydrodynamic radiuses of native HSA and attached PEG could be as a result of shielded attachment of polymer around protein.
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Affiliation(s)
- Parvin Akbarzadehlaleh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mona Mirzaei
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdiyeh Mashahdi-Keshtiban
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamid Reza Heidari
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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2
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Abstract
Demyelinating forms of Charcot-Marie-Tooth disease (CMT) are genetically and phenotypically heterogeneous and result from highly diverse biological mechanisms including gain of function (including dominant negative effects) and loss of function. While no definitive treatment is currently available, rapid advances in defining the pathomechanisms of demyelinating CMT have led to promising pre-clinical studies, as well as emerging clinical trials. Especially promising are the recently completed pre-clinical genetic therapy studies in PMP-22, GJB1, and SH3TC2-associated neuropathies, particularly given the success of similar approaches in humans with spinal muscular atrophy and transthyretin familial polyneuropathy. This article focuses on neuropathies related to mutations in PMP-22, MPZ, and GJB1, which together comprise the most common forms of demyelinating CMT, as well as on select rarer forms for which promising treatment targets have been identified. Clinical characteristics and pathomechanisms are reviewed in detail, with emphasis on therapeutically targetable biological pathways. Also discussed are the challenges facing the CMT research community in its efforts to advance the rapidly evolving biological insights to effective clinical trials. These considerations include the limitations of currently available animal models, the need for personalized medicine approaches/allele-specific interventions for select forms of demyelinating CMT, and the increasing demand for optimal clinical outcome assessments and objective biomarkers.
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Affiliation(s)
- Vera Fridman
- Department of Neurology, University of Colorado Anschutz Medical Campus, 12631 E 17th Avenue, Mailstop B185, Room 5113C, Aurora, CO, 80045, USA.
| | - Mario A Saporta
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
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3
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Chen G, Pagano J, Yu D, Ghose S, Li Z, Ghosh R. Fast and high-resolution purification of a PEGylated protein using a z 2 laterally-fed membrane chromatography device. J Chromatogr A 2021; 1652:462375. [PMID: 34256267 DOI: 10.1016/j.chroma.2021.462375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/19/2021] [Accepted: 06/24/2021] [Indexed: 11/28/2022]
Abstract
PEGylated proteins comprise a class of value-added biopharmaceuticals. High-resolution separation techniques are required for the purification of these molecules. In this study, we discuss the application of a newly developed z2 laterally-fed membrane chromatography (or z2LFMC) device for carrying out high-resolution purification of a PEGylated protein drug. The device used in the current study contained a stack of anion exchange (Q) membranes. The membrane bed-height of this z2LFMC device being small, it could be operated at very high flow rates, at relatively low back pressures. The primary goal was to speedily and efficiently separate a mono-PEGylated protein from impurities present in the PEGylation reaction mixture. A resin-based anion exchange column having the same ligand and bed-volume was used as the control device. The purification performance of the z2LFMC device and the control column were compared terms of resolution, recovery and purity. The z2LFMC device outperformed the control column in terms of every metric compared in this study. Higher purity (85.4% as opposed to 77.9%) and higher recovery (28% greater) of the target mono-PEGylated protein were obtained using the z2LFMC device at 20-time higher speed. These results clearly demonstrate that the z2LFMC device could be a faster and more efficient alternative to resin-based columns for purification of biopharmaceuticals.
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Affiliation(s)
- Guoqiang Chen
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - John Pagano
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Deqiang Yu
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Sanchayita Ghose
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Zhengjian Li
- Biologics Process Development, Bristol-Myers Squibb, 3510F-BDB231, 38 Jackson Road, Devens MA 01434, United States
| | - Raja Ghosh
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada.
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Mejía-manzano LA, Vázquez-villegas P, González-valdez J. Perspectives, Tendencies, and Guidelines in Affinity-Based Strategies for the Recovery and Purification of PEGylated Proteins. Advances in Polymer Technology 2020; 2020:1-12. [DOI: 10.1155/2020/6163904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In recent years, the effective purification of PEGylated therapeutic proteins from reaction media has received particular attention. Although several techniques have been used, affinity-based strategies have been scarcely explored despite the fact that, after PEGylation, marked changes in the molecular affinity parameters of the modified molecules are observed. With this in mind, future contributions in the bioseparation of these polymer-protein conjugates are expected to exploit affinity in chromatographic and nonchromatographic techniques which will surely derive in the integration of different operations. However, this will only occur as novel ligands which are simultaneously found. As it will be mentioned, these novel ligands may be screened or designed. In both cases, computer-aided tools will support their identification or development. Additionally, ligand discovery by high-throughput screening (HTS) is believed to become a fast, economic, and informative technology that will aid in the mass production of ligands along with genetic engineering and related technologies. Therefore, besides analyzing the state of the art in affinity separation strategies for PEGylated molecules, this review proposes a basic guideline for the selection of adequate ligands to provide information and prospective on the future of affinity operations in solving this particular bioengineering problem.
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5
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Thi Nguyen NT, Yun S, Lim DW, Lee EK. Shielding effect of a PEG molecule of a mono-PEGylated peptide varies with PEG chain length. Prep Biochem Biotechnol 2018; 48:522-527. [DOI: 10.1080/10826068.2018.1466157] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ngoc-Thanh Thi Nguyen
- Department of Bionanotechnology, Graduate School, Hanyang University ERICA, Ansan, Korea
| | - Soi Yun
- Department of Bionanotechnology, Graduate School, Hanyang University ERICA, Ansan, Korea
| | - Dong Woo Lim
- Department of Bionanotechnology, Graduate School, Hanyang University ERICA, Ansan, Korea
| | - E. K. Lee
- Department of Bionanotechnology, Graduate School, Hanyang University ERICA, Ansan, Korea
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6
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Großhans S, Rüdt M, Sanden A, Brestrich N, Morgenstern J, Heissler S, Hubbuch J. In-line Fourier-transform infrared spectroscopy as a versatile process analytical technology for preparative protein chromatography. J Chromatogr A 2018. [DOI: 10.1016/j.chroma.2018.03.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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7
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Isakari Y, Kishi Y, Yoshimoto N, Yamamoto S, Podgornik A. Reaction-Mediated Desorption of Macromolecules: Novel Phenomenon Enabling Simultaneous Reaction and Separation. Biotechnol J 2018; 13:e1700738. [PMID: 29393589 DOI: 10.1002/biot.201700738] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/22/2018] [Indexed: 12/11/2022]
Abstract
Combining chemical reaction with separation offers several advantages. In this work possibility to induce spontaneous desorption of adsorbed macromolecules, once being PEGylated, through adjustment of the reagent composition is investigated. Bovine serum albumin (BSA) and activated oligonucleotide, 9T, are used as the test molecules and 20 kDa linear activated PEG is used for their PEGylation. BSA solid-phase PEGylation is performed on Q Sepharose HP. Distribution coefficient of BSA and PEG-BSA as a function of NaCl is determined using linear gradient elution (LGE) experiments and Yamamoto model. According to the distribution coefficient the selectivity between BSA and PEG - BSA of around 15 is adjusted by using NaCl. Spontaneous desorption of PEG - BSA is detected with no presence of BSA. However, due to a rather low selectivity, also desorption of BSA occurred at high elution volume. A similar procedure is applied for activated 9T oligonucleotide, this time using monolithic CIM QA disk monolithic column for adsorption. Selectivity of over 2000 is obtained by proper adjustment of PEG reagent composition. High selectivity enables spontaneous desorption of PEG-9T without any desorption of activated 9T. Both experiments demonstrates that reaction-mediated desorption of macromolecules is possible when the reaction conditions are properly tuned.
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Affiliation(s)
- Yu Isakari
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine, Yamaguchi University, Ube, Japan
| | - Yuhi Kishi
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine, Yamaguchi University, Ube, Japan
| | - Noriko Yoshimoto
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine, Yamaguchi University, Ube, Japan.,Biomedical Engineering Center (YUBEC), Yamaguchi University, Ube, Japan
| | - Shuichi Yamamoto
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine, Yamaguchi University, Ube, Japan.,Biomedical Engineering Center (YUBEC), Yamaguchi University, Ube, Japan
| | - Aleš Podgornik
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia.,Center of Excellence COBIK, Ajdovščina, Slovenia
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8
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Morgenstern J, Wang G, Baumann P, Hubbuch J. Model-Based Investigation on the Mass Transfer and Adsorption Mechanisms of Mono-Pegylated Lysozyme in Ion-Exchange Chromatography. Biotechnol J 2017; 12. [DOI: 10.1002/biot.201700255] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/05/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Josefine Morgenstern
- Institute of Engineering in Life Sciences; Section IV: Biomolecular Separation Engineering; Karlsruhe Institute of Technology (KIT); Engler-Bunte-Ring 3 76131 Karlsruhe Germany
| | - Gang Wang
- Institute of Engineering in Life Sciences; Section IV: Biomolecular Separation Engineering; Karlsruhe Institute of Technology (KIT); Engler-Bunte-Ring 3 76131 Karlsruhe Germany
| | - Pascal Baumann
- Institute of Engineering in Life Sciences; Section IV: Biomolecular Separation Engineering; Karlsruhe Institute of Technology (KIT); Engler-Bunte-Ring 3 76131 Karlsruhe Germany
| | - Jürgen Hubbuch
- Institute of Engineering in Life Sciences; Section IV: Biomolecular Separation Engineering; Karlsruhe Institute of Technology (KIT); Engler-Bunte-Ring 3 76131 Karlsruhe Germany
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9
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Akbarzadehlaleh P, Mirzaei M, Mashahdi-Keshtiban M, Shamsasenjan K, Heydari H. PEGylated Human Serum Albumin: Review of PEGylation, Purification and Characterization Methods. Adv Pharm Bull 2016; 6:309-317. [PMID: 27766215 DOI: 10.15171/apb.2016.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/20/2016] [Accepted: 07/19/2016] [Indexed: 11/09/2022] Open
Abstract
Human serum albumin (HSA) is a non-glycosylated, negatively charged protein (Mw: about 65-kDa) that has one free cystein residue (Cys 34), and 17 disulfide bridges that these bridges have main role in its stability and longer biological life-time (15 to 19 days). As HSA is a multifunctional protein, it can also bind to other molecules and ions in addition to its role in maintaining colloidal osmotic pressure (COP) in various diseases. In critical illnesses changes in the level of albumin between the intravascular and extravascular compartments and the decrease in its serum concentration need to be compensated using exogenous albumin; but as the size of HSA is an important parameter in retention within the circulation, therefore increasing its molecular size and hydrodynamic radius of HSA by covalent attachment of poly ethylene glycol (PEG), that is known as PEGylation, provides HSA as a superior volume expander that not only can prevent the interstitial edema but also can reduce the infusion frequency. This review focuses on various PEGylation methods of HSA (solid phase and liquid phase), and compares various methods to purifiy and characterize the pegylated form.
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Affiliation(s)
- Parvin Akbarzadehlaleh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.; Deapartment of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mona Mirzaei
- Deapartment of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdiyeh Mashahdi-Keshtiban
- Deapartment of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Karim Shamsasenjan
- Deapartment of Immunology and Hematology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamidreza Heydari
- Deapartment of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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10
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Nguyen NTT, Lee JS, Yun S, Lee E. Separation of mono- and di-PEGylate of exenatide and resolution of positional isomers of mono-PEGylates by preparative ion exchange chromatography. J Chromatogr A 2016; 1457:88-96. [DOI: 10.1016/j.chroma.2016.06.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 06/08/2016] [Accepted: 06/12/2016] [Indexed: 10/21/2022]
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11
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Abstract
Proteins perform specific biological functions that strongly depend on their three-dimensional structure. This three-dimensional structure, i.e. the way the protein folds, is strongly determined by the interaction between the protein and the water solvent. We study the dynamics of water in aqueous solutions of several globular proteins at different degrees of urea-induced unfolding, using polarization-resolved femtosecond infrared spectroscopy. We observe that a fraction of the water molecules is strongly slowed down by their interaction with the protein surface. By monitoring the slow water fraction we can directly probe the amount of water-exposed protein surface. We find that at mild denaturing conditions, the water-exposed surface increases by almost 50%, while the secondary structure is still intact. This finding indicates that protein unfolding starts with the protein structure becoming less tight, thereby allowing water to enter.
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Affiliation(s)
- Carien C M Groot
- FOM institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Huib J Bakker
- FOM institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
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12
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Isakari Y, Podgornik A, Yoshimoto N, Yamamoto S. Monolith disk chromatography separates PEGylated protein positional isoforms within minutes at low pressure. Biotechnol J 2015; 11:100-6. [DOI: 10.1002/biot.201500294] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/02/2015] [Accepted: 11/23/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Yu Isakari
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine; Yamaguchi University; Ube Japan
| | - Ales Podgornik
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Ljubljana Slovenia
- Center of Excellence COBIK; Ajdovščina Slovenia
| | - Noriko Yoshimoto
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine; Yamaguchi University; Ube Japan
| | - Shuichi Yamamoto
- Bio-Process Engineering Laboratory, School of Engineering and Graduate School of Medicine; Yamaguchi University; Ube Japan
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13
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Pfister D, Steinebach F, Morbidelli M. Linear isotherm determination from linear gradient elution experiments. J Chromatogr A 2015; 1375:33-41. [DOI: 10.1016/j.chroma.2014.11.067] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 11/25/2014] [Accepted: 11/25/2014] [Indexed: 11/28/2022]
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14
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Gospodarek AM, Hiser DE, O’Connell JP, Fernandez EJ. Unfolding of a model protein on ion exchange and mixed mode chromatography surfaces. J Chromatogr A 2014; 1355:238-52. [DOI: 10.1016/j.chroma.2014.06.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 06/02/2014] [Accepted: 06/05/2014] [Indexed: 10/25/2022]
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15
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Angarita M, Arosio P, Müller-Späth T, Baur D, Falkenstein R, Kuhne W, Morbidelli M. Role of urea on recombinant Apo A-I stability and its utilization in anion exchange chromatography. J Chromatogr A 2014; 1354:18-25. [DOI: 10.1016/j.chroma.2014.05.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 05/23/2014] [Accepted: 05/27/2014] [Indexed: 10/25/2022]
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16
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Pfister D, Morbidelli M. Process for protein PEGylation. J Control Release 2014; 180:134-49. [DOI: 10.1016/j.jconrel.2014.02.002] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 01/31/2014] [Accepted: 02/03/2014] [Indexed: 11/25/2022]
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Abstract
PEGylation is a common and highly accepted possibility for half-life prolongation of proteins by increasing the hydrodynamic size. The chromatographic purification of PEGylated protein, using PEG (poly-ethylene glycol) of different PEG chain lengths, with the example of lysozyme and a scFv, is described in detail here, and helpful suggestions for the purification of other PEGylated proteins are listed. The relevant characterization methods for PEGylated proteins, important for the successful purification, are also described. The purification starts with a CEX (cation exchange) chromatography leading to about 95 % purity for polishing HIC (hydrophobic interaction chromatography) is described.
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Affiliation(s)
- Anna Moosmann
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, Stuttgart, 70569, Germany,
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18
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Yoshimoto N, Isakari Y, Itoh D, Yamamoto S. PEG chain length impacts yield of solid-phase protein PEGylation and efficiency of PEGylated protein separation by ion-exchange chromatography: Insights of mechanistic models. Biotechnol J 2013; 8:801-10. [DOI: 10.1002/biot.201200325] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/10/2013] [Accepted: 06/04/2013] [Indexed: 11/09/2022]
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19
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Maiser B, Kröner F, Dismer F, Brenner-Weiß G, Hubbuch J. Isoform separation and binding site determination of mono-PEGylated lysozyme with pH gradient chromatography. J Chromatogr A 2012; 1268:102-8. [DOI: 10.1016/j.chroma.2012.10.047] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 10/11/2012] [Accepted: 10/17/2012] [Indexed: 11/16/2022]
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20
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Hahn R. Methods for characterization of biochromatography media. J Sep Sci 2012; 35:3001-32. [DOI: 10.1002/jssc.201200770] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 08/22/2012] [Accepted: 08/23/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Rainer Hahn
- Department of Biotechnology; University of Natural Resources and Life Sciences; Vienna Austria
- Austrian Centre of Industrial Biotechnology; Vienna Austria
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21
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Moosmann A, Gerlach E, Lindner R, Böttinger H. Purification of a PEGylated single chain Fv. J Chromatogr A 2012; 1236:90-6. [DOI: 10.1016/j.chroma.2012.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 02/28/2012] [Accepted: 03/01/2012] [Indexed: 10/28/2022]
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22
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Zhai Y, Zhou W, Wei W, Qu J, Lei J, Su Z, Ma G. Functional gigaporous polystyrene microspheres facilitating separation of poly(ethylene glycol)–protein conjugate. Anal Chim Acta 2012; 712:152-61. [DOI: 10.1016/j.aca.2011.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 09/29/2011] [Accepted: 11/01/2011] [Indexed: 10/15/2022]
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23
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Etzel MR, Bund T. Monoliths for the purification of whey protein–dextran conjugates. J Chromatogr A 2011; 1218:2445-50. [DOI: 10.1016/j.chroma.2011.01.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 01/06/2011] [Accepted: 01/11/2011] [Indexed: 11/25/2022]
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25
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Abstract
The self-associative properties of apolipoprotein A-I(Milano) (apoA-I(M)) were investigated in relationship to its anion exchange behavior on Q-Sepharose-HP with and without the addition of urea as a denaturant. Self-association was dependent on protein and urea concentration and both influenced interactions of the protein with the chromatographic surface. In the absence of urea, apoA-I(M) was highly associated and existed primarily as a mixture of homodimer, tetramer and hexamer forms. Under these conditions, since the binding strength was greater for the oligomer forms, broad, asymmetrical peaks were obtained in both isocratic and gradient elution. Adding urea depressed self-association and caused unfolding. This resulted in sharper peaks but also decreased the binding strength. Thus, under these conditions chromatographic elution occurred at lower salt concentrations. The adsorption isotherms obtained at high protein loadings were also influenced by self-association and by the varying binding strength of the differently associated and unfolded forms. The isotherms were thus dependent on protein, urea, and salt concentration. Maximum binding capacity was obtained in the absence of urea, where adsorption of oligomers was shown to be dominant. Adding urea reduced the apparent binding capacity and weakened the apparent binding strength. A steric mass action model accounting for competitive binding of the multiple associated forms was used to successfully describe the equilibrium binding behavior using parameters determined from isocratic elution and isotherm experiments.
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Affiliation(s)
- Theresa E Bankston
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904-4741, USA
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Hou Y, Hansen TB, Staby A, Cramer SM. Effects of urea induced protein conformational changes on ion exchange chromatographic behavior. J Chromatogr A 2010; 1217:7393-400. [PMID: 20956007 DOI: 10.1016/j.chroma.2010.09.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Revised: 09/16/2010] [Accepted: 09/20/2010] [Indexed: 11/23/2022]
Abstract
Urea is widely employed to facilitate protein separations in ion exchange chromatography at various scales. In this work, five model proteins were used to examine the chromatographic effects of protein conformational changes induced by urea in ion exchange chromatography. Linear gradient experiments were carried out at various urea concentrations and the protein secondary and tertiary structures were evaluated by far UV CD and fluorescence measurements, respectively. The results indicated that chromatographic retention times were well correlated with structural changes and that they were more sensitive to tertiary structural change. Steric Mass Action (SMA) isotherm parameters were also examined and the results indicated that urea induced protein conformational changes could affect both the characteristic charge and equilibrium constants in these systems. Dynamic light scattering analysis of changes in protein size due to urea-induced unfolding indicated that the size of the protein was not correlated with SMA parameter changes. These results indicate that while urea-induced structural changes can have a marked effect on protein chromatographic behavior in IEX, this behavior can be quite complicated and protein specific. These differences in protein behavior may provide insight into how these partially unfolded proteins are interacting with the resin material.
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Müller E, Josic D, Schröder T, Moosmann A. Solubility and binding properties of PEGylated lysozyme derivatives with increasing molecular weight on hydrophobic-interaction chromatographic resins. J Chromatogr A 2010; 1217:4696-703. [DOI: 10.1016/j.chroma.2010.05.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 04/30/2010] [Accepted: 05/07/2010] [Indexed: 11/26/2022]
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28
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Abstract
Hydrophobins are adhesive proteins produced by filamentous fungi. They are in many cases secreted into the medium and adsorb readily to a number of different surfaces. They fulfill many different tasks such as the formation of various coatings and mediating adhesion of fungi to surfaces. The mechanism of how hydrophobins adhere and how they mediate fungal adhesion is of interest both from the point of view of fungal biology and for various biotechnical immobilization applications. It has been shown that hydrophobins typically form a monomolecular layer on solid substrates. We are especially interested in how a surface layer of hydrophobin can mediate the adhesion of a second layer of another protein. In this work we systematically studied how proteins adsorb onto hydrophobins that are bound as monomolecular layers on nonpolar surfaces. We found that several types of proteins readily adsorb onto hydrophobins, but only under defined conditions of pH and ionic strength. The binding conditions were also highly dependent on the adhering protein. By studying solution conditions such as pH and ionic strength, we conclude that the surface adhesion is due to selective Coulombic charge interactions. We conclude that hydrophobins can transform a nonpolar surface into one that efficiently recruits other proteins by charge interactions.
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Affiliation(s)
- Zefang Wang
- VTT Biotechnology, Technical Research Centre of Finland, Tietotie 2, FIN-02044VTT, Espoo, Finland
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Abe M, Akbarzaderaleh P, Hamachi M, Yoshimoto N, Yamamoto S. Interaction mechanism of mono-PEGylated proteins in electrostatic interaction chromatography. Biotechnol J 2010; 5:477-83. [DOI: 10.1002/biot.201000013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Moosmann A, Christel J, Boettinger H, Mueller E. Analytical and preparative separation of PEGylated lysozyme for the characterization of chromatography media. J Chromatogr A 2010; 1217:209-15. [DOI: 10.1016/j.chroma.2009.11.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 11/06/2009] [Accepted: 11/11/2009] [Indexed: 11/29/2022]
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31
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Hunter AK, Suda EJ, Herberg JT, Thomas KE, Shell RE, Gustafson ME, Ho SV. Separation of recombinant apolipoprotein A-I(Milano) modified forms and aggregates in an industrial ion-exchange chromatography unit operation. J Chromatogr A 2008; 1204:42-7. [PMID: 18701112 DOI: 10.1016/j.chroma.2008.07.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 07/10/2008] [Accepted: 07/14/2008] [Indexed: 11/30/2022]
Abstract
We have shown how protein self-association impacts the ion-exchange separation of modified forms and aggregates for apolipoprotein A-I(Milano). It is well known that reversible self-association of a protein can lead to chromatographic band broadening, peak splitting, merging, fronting, and tailing. To mitigate these effects, urea or an organic modifier can be added to the chromatography buffers to shift the equilibrium distribution of the target molecule to the dissociated form. A first generation process that did not utilize urea resulted in low yield and low purity as it was not possible to separate protein aggregates. A second generation process run in the presence of 6M urea resulted in high purity and high yield, but throughput was limited due to low resin binding capacity when the protein was completely denatured. A third generation process achieved high purity, high yield, and high throughput by shifting the urea concentration during the process to continually operate in the optimal window for maximum loading and selectivity. Key to these systematic process improvements was the rational understanding of the interplay of urea concentration and ion-exchange chromatographic behavior. Results from pilot and industrial scale operations are presented, demonstrating the suitability of the techniques described in this work for the large scale manufacture of recombinant therapeutic proteins.
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Affiliation(s)
- Alan K Hunter
- Pfizer Global Biologics, 700 Chesterfield Parkway West, Chesterfield, MO 63017, USA.
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Cabrera R, Zhelyazkova P, Galvis L, Fernandez-Lahore M. Tailoring orthogonal proteomic routines to understand protein separation during ion exchange chromatography. J Sep Sci 2008; 31:2500-10. [PMID: 18646262 DOI: 10.1002/jssc.200800076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Surface charge, molecular weight, and folding state are known to influence protein chromatographic behaviour onto ion exchangers. Experimentally, information related to such factors can be gathered via 2-DE methods. The application of 2-D PAGE under denaturing/reducing conditions was already shown to reveal separation trends within a large protein population from cell extracts. However, ion-exchange chromatography normally runs under native conditions. A tailored protocol consisting in a first separation based on IEF on Immobiline strips under native conditions followed by a second dimension SDS-PAGE run was adopted. The chromatographic versus electrophoretic separation behaviours of two model proteins, thaumatin (TAU) and BSA, were compared to better understand which proteomic routine would be better suited to anticipate IEX chromatographic separations. It was observed that the information contained in the pI value obtained with the adapted 2-DE protocol showed better correlation with the IEX chromatographic behaviour. On the other hand, chromatographic separations performed in the presence of urea as a denaturant have demonstrated the potential influence of hydrodynamic radius/conformation on protein separation. Moreover, the information provided by such 2-D system correlated well with the chromatographic behaviour of an additional set of pure proteins. An initial prediction of protein ion-exchange chromatographic behaviour could be possible utilizing an experimental approach based on 2-DE running under milder chemical conditions. This technique provides information that more closely resembles the separation behaviour observed with a complex biotechnological feedstock.
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Affiliation(s)
- Rosa Cabrera
- Downstream Processing Laboratory, School of Engineering and Science, Jacobs University, Bremen, Germany.
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