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Sivanathan GT, Mallubhotla H, Suggala SV, Tholu MS. Separation of closely related monoclonal antibody charge variant impurities using poly(ethylenimine)-grafted cation-exchange chromatography resin. 3 Biotech 2022; 12:293. [PMID: 36276450 PMCID: PMC9515282 DOI: 10.1007/s13205-022-03350-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 06/21/2022] [Accepted: 09/04/2022] [Indexed: 11/28/2022] Open
Abstract
The removal of protein charge variants due to complex chemical and enzymatic modifications like glycosylation, fragmentation and deamidation presents a significant challenge in the purification of monoclonal antibodies (mAb) and complicates downstream processing. These protein modifications occur either in vivo or during fermentation and downstream processing. The presence of charge variants can lead to diminished biological activity, differences in pharmacokinetics, pharmacodynamics, stability and efficacy. Therefore, these different product variants should be appropriately controlled for the consistency of product quality and to ensure patient safety. This investigation focuses on the development of a chromatography step for the removal of the charge variants from a recombinant single-chain variable antibody fragment (scFv-Fc-Ab). Poly(ethyleneimine)-grafted cation-exchange resins (Poly CSX and Poly ABX) were evaluated and compared to traditional macroporous cation-exchange and tentacle cation-exchange resins. Linear salt gradient experiments were conducted to study the separation efficiency of scFv-Fc-Ab variants using different resins. A classical thermodynamic model was used to develop a mechanistic understanding of the differences in charge variant retention behaviour of different resins. High selectivity in separation of scFv-Fc-Ab charge variants is obtained in the Poly CSX resin.
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Affiliation(s)
- Ganesh T. Sivanathan
- Department of Chemical Engineering, JNTUA, Ananthapuramu, Andhra Pradesh 515002 India
- Biopharmaceutical Development, Syngene International Ltd., Bangalore, 560099 India
| | - Hanuman Mallubhotla
- Biopharmaceutical Development, Syngene International Ltd., Bangalore, 560099 India
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Simoes-Cardoso JC, Hoshino N, Yoshimura Y, Chen CS, Dias-Cabral C, Yoshimoto N, Yamamoto S. Correlation between protein desorption behavior and its adsorption enthalpy change in polymer grafted anion exchange chromatography. Colloids Surf B Biointerfaces 2021; 205:111853. [PMID: 34098366 DOI: 10.1016/j.colsurfb.2021.111853] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 04/29/2021] [Accepted: 05/13/2021] [Indexed: 10/21/2022]
Abstract
Thermodynamic studies on protein adsorption onto chromatographic surfaces mainly focus on the molecular level interaction between proteins and ligands. Yet, not much attention is given to the study of polymer grafted ligand architecture effect on thermodynamic parameters, nor to the relation between chromatographic parameters and the directly obtained thermodynamic parameters. These relations are needed in order to confer meaning and to ease future data interpretation of thermodynamic studies of protein adsorption. In this study, the adsorption of bovine serum albumin monomer (BSAm) onto chromatographic surfaces with grafted ligands was studied from a thermodynamic point of view together with chromatographic data. Isothermal titration calorimetry (ITC) results showed that BSAm adsorption is exothermic (ΔH¯ads < 0) when adsorbs onto Toyopearl GigaCapQ 650 M, Toyopearl Q600AR, and Q Sepharose XL, but endothermic (ΔH¯ads > 0) when adsorbs onto Toyopearl SuperQ and a conventional resin (Q Sepharose Fast Flow), showing clear differences in the driving forces of adsorption caused by different ligand architectures. In addition, we found a new relation between the salt required for protein elution and the change in adsorption enthalpy (ΔH¯ads) directly measured with ITC, intrinsically connecting both adsorption and desorption mechanisms.
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Affiliation(s)
- Joao Carlos Simoes-Cardoso
- Bio-Process Engineering Laboratory, Biomedical Engineering Center, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan.
| | - Nanako Hoshino
- Bio-Process Engineering Laboratory, Biomedical Engineering Center, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
| | - Yusuke Yoshimura
- Bio-Process Engineering Laboratory, Biomedical Engineering Center, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
| | - Chyi-Shin Chen
- Bio-Process Engineering Laboratory, Biomedical Engineering Center, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
| | - Cristina Dias-Cabral
- CICS-UBI - Health Sciences Research Centre, University of Beira Interior, Covilhã, 6200-506, Portugal; Department of Chemistry, University of Beira Interior, Covilhã, 6201-001, Portugal
| | - Noriko Yoshimoto
- Bio-Process Engineering Laboratory, Biomedical Engineering Center, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
| | - Shuichi Yamamoto
- Bio-Process Engineering Laboratory, Biomedical Engineering Center, Yamaguchi University, Tokiwadai 2-16-1, Ube 755-8611, Japan
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