Abstract
Many post-translational modifications, including glycosylation, are pivotal for the structural integrity, location and functional activity of glycoproteins. Sub-populations of proteins that are relocated or functionally changed by such modifications can change resting proteins into active ones, mediating specific effector functions, as in the case of monoclonal antibodies. To ensure safe and efficacious drugs it is essential to employ appropriate robust, quantitative analytical strategies that can (i) perform detailed glycan structural analysis, (ii) characterise specific subsets of glycans to assess known critical features of therapeutic activities (iii) rapidly profile glycan pools for at-line monitoring or high level batch to batch screening. Here we focus on these aspects of glycan analysis, showing how state-of-the-art technologies are required at all stages during the production of recombinant glycotherapeutics. These data can provide insights into processing pathways and suggest markers for intervention at critical control points in bioprocessing and also critical decision points in disease and drug monitoring in patients. Importantly, these tools are now enabling the first glycome/genome studies in large populations, allowing the integration of glycomics into other ‘omics platforms in a systems biology context.
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Abbreviations
- 2AB:
-
2-aminobenzamide
- ADCC:
-
Antibody dependent cell cytotoxicity
- APTS:
-
8-aminopyrene-1,3,6-trisulfonate
- BEH:
-
Ethylene Bridged Hybrid
- CE-LIF:
-
Capillary electrophoresis with laser induced fluorescence
- CQA:
-
Critical quality attribute
- EMA:
-
European Medicines Agency
- EPO:
-
Erythropoietin
- ESI-MS:
-
Electrospray ionization – mass spectrometry
- FDA:
-
Food and Drug Administration
- FLD:
-
Fluorescence detector
- FUT6 and FUT8:
-
Fucosyltransferase 6 and 8
- GWAS:
-
Genome-wide association study
- HILIC:
-
Hydrophilic interaction chromatography
- HNF1α:
-
Hepatocyte nuclear factor 1α
- HPLC:
-
High performance liquid chromatography
- IgG:
-
Immunoglobulin G
- LC-MS:
-
Liquid chromatography – mass spectrometry
- MALDI:
-
Matrix-assisted laser desorption/ionization
- NMR:
-
Nuclear magnetic resonance
- PAT:
-
Process analytical technology
- PGC:
-
Porous graphitized carbon
- RP:
-
Reversed phase
- SNPs:
-
Single nucleotide polymorphisms
- UPLC:
-
Ultra performance liquid chromatography
- WAX:
-
Weak anion exchange
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Funding
TT acknowledges funding from Science Foundation Ireland (Reproductive Biology Research Cluster (RBRC)) [grant number 07/SRC/B1156], BA acknowledges funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement 215536 (EuroGlycoArrays), MAD acknowledges funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement 259869 (GlycoBioM). The authors thank Prof. Johannis P. Kamerling for fruitful discussions.
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Tharmalingam, T., Adamczyk, B., Doherty, M.A. et al. Strategies for the profiling, characterisation and detailed structural analysis of N-linked oligosaccharides. Glycoconj J 30, 137–146 (2013). https://doi.org/10.1007/s10719-012-9443-9
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DOI: https://doi.org/10.1007/s10719-012-9443-9