CSF N-Glycomics Using High-Throughput UPLC-ESI Techniques in Alzheimer's Disease

Area of Science:

• Biochemistry
• Analytical Chemistry
• Neuroscience

Background:

• The N-glycome, or the complete set of N-glycans, plays crucial roles in biological processes.
• Structural elucidation of cerebrospinal fluid (CSF) N-glycans is vital for understanding neurological diseases.
• Existing methods for N-glycan analysis can be time-consuming and lack throughput.

Purpose of the Study:

• To present a high-throughput method for the structural elucidation of the CSF N-glycome.
• To adapt and optimize a commercial kit (RapiFluor-MS) for CSF N-glycan analysis.
• To achieve rapid, accurate, and isomer-resolving analysis of CSF N-glycans.

Main Methods:

• Utilized a commercial WATERS™ RapiFluor-MS (RFMS) kit for N-deglycosylation and labeling.
• Modified the RFMS methodology by increasing glycosylation time.
• Employed a high-resolution mass analyzer for sensitive and accurate CSF N-glycan analysis.

Main Results:

• Achieved a high-throughput method capable of analyzing up to 96 samples simultaneously.
• Obtained mass accuracy better than 5 ppm for CSF N-glycan identification.
• Demonstrated the ability to separate and identify N-glycan isomers.

Conclusions:

• The optimized RapiFluor-MS method provides a rapid and efficient approach for CSF N-glycome structural elucidation.
• This high-throughput methodology facilitates large-scale glycomic studies of CSF.
• The enhanced accuracy and isomer resolution advance the potential for biomarker discovery in neurological conditions.