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Chouquet A, Pinto AJ, Hennicke J, Ling WL, Bally I, Schwaigerlehner L, Thielens NM, Kunert R, Reiser JB. Biophysical Characterization of the Oligomeric States of Recombinant Immunoglobulins Type-M and Their C1q-Binding Kinetics by Biolayer Interferometry. Front Bioeng Biotechnol 2022; 10:816275. [PMID: 35685087 PMCID: PMC9173649 DOI: 10.3389/fbioe.2022.816275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Immunoglobulins type-M (IgMs) are one of the first antibody classes mobilized during immune responses against pathogens and tumor cells. Binding to specific target antigens enables the interaction with the C1 complex which strongly activates the classical complement pathway. This biological function is the basis for the huge therapeutic potential of IgMs. But, due to their high oligomeric complexity, in vitro production, biochemical characterization, and biophysical characterization are challenging. In this study, we present recombinant production of two IgM models (IgM617 and IgM012) in pentameric and hexameric states and the evaluation of their polymer distribution using different biophysical methods (analytical ultracentrifugation, size exclusion chromatography coupled to multi-angle laser light scattering, mass photometry, and transmission electron microscopy). Each IgM construct is defined by a specific expression and purification pattern with different sample quality. Nevertheless, both purified IgMs were able to activate complement in a C1q-dependent manner. More importantly, BioLayer Interferometry (BLI) was used for characterizing the kinetics of C1q binding to recombinant IgMs. We show that recombinant IgMs possess similar C1q-binding properties as IgMs purified from human plasma.
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Affiliation(s)
- Anne Chouquet
- Institut de Biologie Structurale, UMR 5075, Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Andrea J Pinto
- Institut de Biologie Structurale, UMR 5075, Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Julia Hennicke
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Wai Li Ling
- Institut de Biologie Structurale, UMR 5075, Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Isabelle Bally
- Institut de Biologie Structurale, UMR 5075, Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Linda Schwaigerlehner
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Nicole M Thielens
- Institut de Biologie Structurale, UMR 5075, Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Renate Kunert
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Jean-Baptiste Reiser
- Institut de Biologie Structurale, UMR 5075, Univ. Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
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Analysis of Product Quality of Complex Polymeric IgM Produced by CHO Cells. Methods Mol Biol 2019. [PMID: 31858475 DOI: 10.1007/978-1-0716-0191-4_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Immunoglobulin M (IgM) antibodies are considered as promising biopharmaceutical drugs in the future despite recombinant production is quite challenging as incomplete polymer formation or nucleic acid adherence can decrease the quality of the IgM preparation. Therefore, we defined densitometric and chromatographic methods as suitable tools to analyze the polymer distribution and the remaining nucleic acid content after initial IgM purification. Additionally, the quality of the glycosylation pattern is an important parameter for biological safety and efficacy.
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Hennicke J, Reinhart D, Altmann F, Kunert R. Impact of temperature and pH on recombinant human IgM quality attributes and productivity. N Biotechnol 2019; 50:20-26. [PMID: 30630093 DOI: 10.1016/j.nbt.2019.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 01/02/2019] [Accepted: 01/04/2019] [Indexed: 12/28/2022]
Abstract
IgM antibodies are arousing considerable interest as biopharmaceuticals. Despite their immunotherapeutic potential, little is known about the impact of environmental conditions on product quantity and quality of these complex molecules. Process conditions influence the critical quality attributes (CQAs) of therapeutic proteins and thus are important parameters for biological safety and efficacy. Here, the results of a systematic study are presented that characterized the influence of temperature and pH on cell-specific productivity and IgM quality attributes. Biphasic temperature and pH shift experiments were performed as batch cultures in DASGIP® bioreactors under controlled conditions and defined by a specific design of experiment (DOE) approach. An internally-developed recombinant IgM producing CHO cell line was used. With respect to product quality, after an initial purification step efforts were focused on pentamer content, nucleic acid (NA) impurities and the glycosylation profile after an initial purification step. All quality attributes were evaluated by densitometric and chromatographic methods. The reduction of cultivation temperature severely reduced IgM titers, while pH variation had no impact. In contrast, IgM quality was not significantly influenced by bioprocessing parameters. Data revealed that an additional purification step is required to reduce the presence of NAs for in vivo applications. In conclusion, the results showed that for the chosen IgM model, IgM012_GL, variation in quality attributes is not caused by the environmental conditions of temperature and pH.
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Affiliation(s)
- Julia Hennicke
- Department of Biotechnology, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - David Reinhart
- Department of Biotechnology, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Friedrich Altmann
- Department of Chemistry, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria
| | - Renate Kunert
- Department of Biotechnology, VIBT, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190, Vienna, Austria.
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Ershler MA, Olovnikova NI. Production of IgM monoclonal antibodies in DG44 cells. APPL BIOCHEM MICRO+ 2014. [DOI: 10.1134/s0003683814090026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mader A, Chromikova V, Kunert R. Recombinant IgM expression in mammalian cells: A target protein challenging biotechnological production. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/abb.2013.44a006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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