HILIC analysis of fluorescence-labeled N-glycans from recombinant biopharmaceuticals

In contrast with conventional drugs, biopharmaceuticals are highly complex molecules with remarkable heterogeneity. Protein glycosylation is an inherent source of this heterogeneity and also affects the safety, efficacy, and serum half-life of therapeutic glycoproteins. Therefore analysis of the gly...

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Veröffentlicht in:Analytical and bioanalytical chemistry 2010-09, Vol.398 (2), p.905-914
Hauptverfasser: Melmer, Michael, Stangler, Thomas, Schiefermeier, Mark, Brunner, Werner, Toll, Hansjörg, Rupprechter, Alfred, Lindner, Wolfgang, Premstaller, Andreas
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container_end_page 914
container_issue 2
container_start_page 905
container_title Analytical and bioanalytical chemistry
container_volume 398
creator Melmer, Michael
Stangler, Thomas
Schiefermeier, Mark
Brunner, Werner
Toll, Hansjörg
Rupprechter, Alfred
Lindner, Wolfgang
Premstaller, Andreas
description In contrast with conventional drugs, biopharmaceuticals are highly complex molecules with remarkable heterogeneity. Protein glycosylation is an inherent source of this heterogeneity and also affects the safety, efficacy, and serum half-life of therapeutic glycoproteins. Therefore analysis of the glycan pattern is an important issue for characterization and quality control in the biopharmaceutical industry. In this publication we describe a complete workflow for the analysis of protein N-glycans. The sample-preparation procedure, consisting of the release of the N-glycans by PNGase-F, followed by fluorescence labeling with 2-aminobenzamide and removal of excess label, was optimized to avoid alteration of the glycan sample. Subsequently, labeled glycans were analyzed by hydrophilic-interaction liquid chromatography (HILIC) with fluorescence detection. The developed method was validated for analysis of antibody N-glycans. To demonstrate the accuracy of the method an antibody sample was additionally analyzed by an orthogonal method. The antibody was digested with lysyl endopeptidase and the (glyco-)peptides were analyzed by RP-HPLC-MS. The consistency of the results between these two methods demonstrates the reliability of the glycan analysis method introduced herein.
doi_str_mv 10.1007/s00216-010-3988-x
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source MEDLINE; SpringerNature Journals
subjects 2-Aminobenzamide
Analysis
Analytical Chemistry
Antibodies
Biochemistry
Biopharmaceutical
Biopharmaceutics
Carbohydrate Sequence
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Chromatographic methods and physical methods associated with chromatography
Chromatography, High Pressure Liquid - methods
Chromatography, Liquid - methods
Drugs
Effectiveness
Exact sciences and technology
Fluorescence
Fluorescence labeling
Fluorescent Dyes - chemistry
Food Science
Glycan
Glycoproteins
Glycoproteins - chemistry
Glycoproteins - metabolism
Health aspects
Heterogeneity
High performance liquid chromatography
HILIC
Laboratory Medicine
Liquid chromatography
Mass Spectrometry
Molecular Sequence Data
Monitoring/Environmental Analysis
N-glycans
Original Paper
ortho-Aminobenzoates - chemistry
Other chromatographic methods
Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase - metabolism
Polysaccharides
Polysaccharides - analysis
Polysaccharides - chemistry
Polysaccharides - metabolism
Proteins
Recombinant
Reproducibility of Results
Sample preparation
Sensitivity and Specificity
Spectrometric and optical methods
title HILIC analysis of fluorescence-labeled N-glycans from recombinant biopharmaceuticals
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