Multiplexed Analytical Glycomics: Rapid and Confident IgG N-Glycan Structural Elucidation

作者：Mittermayr Stefan; Bones Jonathan; Doherty Margaret; Guttman Andras; Rudd Pauline M^*

来源：Journal of Proteome Research, 2011, 10(8): 3820-3829.

DOI：10.1021/pr200371s

• antibody glycosylation
• IgG glycosylation
• biopharmaceutical
• oligosaccharides
• glycan analysis
• ultra performance liquid chromatography
• hydrophilic interaction liquid chromatography
• capillary electrophoresis laser induced fluorescence
• glucose unit

N-Glycans attached to the C(H)2 domains of the Fc or the antigen binding regions of IgG play an important role in stabilizing and modulating antibody activity. Exhaustive elucidation of 32 IgG N-glycans using a combination of weak anion exchange enrichment and exoglycosidase array digestion with subsequent profiling exceeded 48 h. Pursuing increased throughput and associated structural annotation confidence, we compared the 1.7 mu m hydrophilic interaction phase for UPLC with CE-LIF for the rapid and comprehensive characterization of N-glycans released from healthy human serum polyclonal IgG. Combination of the data individually generated using each technique demonstrated that complete structural annotation was possible within a total analysis time of 20 min due to the advantageous orthogonality of the separation mechanisms. The parallel use of both analytical techniques provides a powerful platform for rapid and comprehensive analysis of IgG N-glycosylation present on therapeutic antibodies or on antibodies of biomedical or pathological significance.

• 出版日期2011-8
• 单位河北医科大学