Multiplexed analytical glycomics: rapid and confident IgG N-glycan structural elucidation

Area of Science:

• Glycobiology
• Analytical Chemistry
• Immunology

Background:

• N-glycans on immunoglobulin G (IgG) are crucial for antibody stability and function.
• Traditional methods for N-glycan elucidation are time-consuming, often exceeding 48 hours.

Purpose of the Study:

• To develop a faster and more comprehensive method for characterizing IgG N-glycans.
• To compare the efficacy of ultra-performance liquid chromatography (UPLC) and capillary electrophoresis-laser induced fluorescence (CE-LIF) for N-glycan analysis.

Main Methods:

• Released N-glycans from healthy human serum polyclonal IgG were analyzed using UPLC with a hydrophilic interaction phase and CE-LIF.
• Orthogonal separation mechanisms of UPLC and CE-LIF were leveraged for enhanced structural annotation.

Main Results:

• Complete structural annotation of IgG N-glycans was achieved in a total analysis time of 20 minutes.
• The combination of UPLC and CE-LIF demonstrated advantageous orthogonality for rapid and comprehensive characterization.

Conclusions:

• Parallel analysis using UPLC and CE-LIF offers a powerful platform for efficient IgG N-glycosylation analysis.
• This approach is valuable for analyzing therapeutic antibodies and those with biomedical or pathological significance.