High-throughput glycomics: optimization of sample preparation.

Area of Science:

• Biochemistry
• Analytical Chemistry
• Proteomics

Background:

• Glycosylation is crucial for protein structure, folding, and function.
• Altered glycosylation patterns are linked to various diseases.
• Plasma N-glycan analysis is challenging due to sample complexity, unlike antibody glycan analysis.

Purpose of the Study:

• To develop and optimize a high-throughput sample preparation method for plasma N-glycan analysis.
• To improve the reproducibility and efficiency of plasma N-glycan purification.
• To enable reliable detection of biological variability in the plasma N-glycome.

Main Methods:

• Development of a solid-phase extraction method for labeled plasma glycans.
• Evaluation of different stationary phases (cellulose, silica gel, Bio-Gel, GHP filter) for glycan clean-up.
• Optimization using Plackett-Burman screening design and validation for reproducibility.

Main Results:

• The hydrophilic GHP filter plate with cold 96% acetonitrile demonstrated the highest reproducibility and ease of use for glycan purification.
• The developed method is fast, cost-effective, and robust over time.
• Validated method shows minimal variation across different steps, days, and individuals.

Conclusions:

• A highly reproducible, cost-effective, and user-friendly method for plasma N-glycan preparation has been established.
• This method facilitates accurate analysis of the plasma N-glycome.
• Enables better understanding of disease-associated glycan alterations.