Online multimethod platform for comprehensive characterization of monoclonal antibodies in cell culture fluid from injection of crude sample - Incorporation of middle-up and bottom-up workflows
Language English Country Netherlands Media print-electronic
Document type Journal Article
PubMed
40221213
DOI
10.1016/j.aca.2025.343943
PII: S0003-2670(25)00337-X
Knihovny.cz E-resources
- Keywords
- Critical quality attributes, IMERs, Multi-dimensional characterization, Protein liquid chromatography, mAb,
- MeSH
- Cell Culture Techniques MeSH
- CHO Cells MeSH
- Chromatography, Affinity MeSH
- Chromatography, Reverse-Phase MeSH
- Cricetulus MeSH
- Humans MeSH
- Antibodies, Monoclonal * analysis chemistry MeSH
- Workflow MeSH
- Animals MeSH
- Check Tag
- Humans MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Antibodies, Monoclonal * MeSH
BACKGROUND: Determination of critical quality attributes (CQAs) of pharmaceutical monoclonal antibodies (mAbs) is an essential part of quality control. Commonly, for each CQA, a separate analytical method and setup is required, making assessment of multiple CQAs time-consuming and labour-intensive. This typically involves offline purification and diverse protein digestion steps, in combination with multiple liquid-chromatographic modes. We developed an integrated, fully online multidimensional platform for direct analysis of mAbs in cell culture fluid (CCF) at an intact, subunit and peptide level from a single injection. RESULTS: This paper focuses on the online middle-up and bottom-up workflows. The platform combines Protein A affinity chromatography (ProtA), immobilized enzyme reactors (IMERs), reversed-phase liquid chromatography (RPLC) and high-resolution mass spectrometry (MS) for characterization of mAbs. Online ProtA was used to isolate mAbs directly from CCF. Subsequent online digestion of isolated mAb was accomplished by IMERs featuring either the proteases IdeS or trypsin. Between ProtA and IMERs, buffer exchange and pH adjustment were achieved using a strong cation-exchange (SCX) trap column. RPLC-MS analysis of F(ab)'2 and Fc/2 fragments obtained after IdeS digestion provided information on mAb glycoform compositions and the potential presence of PTMs and subunit variants. RPLC-MS/MS analysis of trypsin-digested peptides provided over 95 % coverage of the mAb's amino acid sequence, but also identification and localization of modifications related to e.g. oxidation and deamidation. Comparisons with established offline methods were made. The overall capacity of the system to perform intact, middle-, and bottom-up analyses in parallel from a single injection is demonstrated for an industrially-relevant mAb in CCF. SIGNIFICANCE: The developed multidimensional platform enables the simultaneous characterization of multiple fractions from a single ProtA-isolated mAb band at intact, middle-up, or bottom-up level using various LC modes at a substantially reduced analysis time.
Agilent Technologies R and D and Marketing GmbH Hewlett Packard Strasse 8 76337 Waldbronn Germany
Department of Chemistry Faculty of Science Masaryk University Kamenice 5 62500 Brno Czech Republic
Polpharma Biologics Utrecht B 5 Yalelaan 46 3584 CM Utrecht the Netherlands
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