Abstract
Due to the complex manufacturing process of therapeutic monoclonal antibodies, it is hardly possible to produce an identical copy of the original product (originator). Consequently, follow-on products (biosimilars) must demonstrate their efficacy being similar to the originator in terms of structure and function. During this process, a variety of analytical methods are required for this purpose. This study focuses on three particularly relevant analytical techniques: high-resolution mass spectrometry, fragment crystallisable (Fc) affinity chromatography, and two-dimensional peptide mapping. Each analytical method proved able to identify specific differences between originator and biosimilar. High-resolution mass spectrometry was used to characterize the glycan pattern. It was shown that a trastuzumab biosimilar did not have the G0:G0F sugar modification identified in the originator. The application of affinity chromatography to rituximab showed that originator and biosimilar interacted differently with the immobilized Fc receptor. Furthermore, 2D-HPLC peptide mapping demonstrated the influence of orthogonality of separation dimensions, leading to differentiation of a rituximab originator and biosimilar.
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Abbreviations
- mAbs:
-
Monoclonal antibodies
- CHO:
-
Chinese hamster ovary cells
- EMA:
-
European Medicines Agency
- API:
-
Active pharmaceutical ingredient
- HRMS:
-
High-resolution mass spectrometry
- 2D-HPLC:
-
Two-dimensional liquid chromatography
- ADCC:
-
Antibody-dependent cell-mediated cytotoxicity
- Fc:
-
Fragment crystallisable
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Acknowledgements
We would like to thank the Federal Ministry for Economic Affairs and Energy for funding the INNO-KOM project “Sensitive method for the detection of airborne proteins” (49VF170039). Furthermore, we would like to thank Tosoh Bioscience for providing materials and samples.
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Lars M. H. Reinders: conceptualization, methodology, validation, formal analysis, investigation, data curation, writing—original draft, writing—review and editing, visualization, project administration, funding acquisition. Martin D. Klassen: conceptualization, methodology, writing—review and editing, supervision, funding acquisition. Thorsten Teutenberg: conceptualization, writing—review and editing, supervision, funding acquisition. Martin Jaeger: writing—review and editing, supervision. Torsten C. Schmidt: writing—review and editing, supervision.
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Reinders, L.M.H., Klassen, M.D., Teutenberg, T. et al. Comparison of originator and biosimilar monoclonal antibodies using HRMS, Fc affinity chromatography, and 2D-HPLC. Anal Bioanal Chem 414, 6761–6769 (2022). https://doi.org/10.1007/s00216-022-04236-8
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DOI: https://doi.org/10.1007/s00216-022-04236-8