Separation and analysis of 4'-epimeric UDP-sugars by borate high-performance liquid chromatography

Area of Science:

• Biochemistry
• Analytical Chemistry
• Chromatography

Background:

• Separating epimeric UDP-sugars is crucial for understanding carbohydrate metabolism.
• Existing methods may lack the speed or resolution for complex biological samples.

Purpose of the Study:

• To develop a rapid and efficient method for separating epimeric UDP-sugars.
• To apply this method for analyzing UDP-sugar profiles in biological systems.

Main Methods:

• Isocratic anion-exchange high-performance liquid chromatography (HPLC) using borate and glycerol.
• A C18 cartridge was used for desalting UDP-sugar samples prior to HPLC.

Main Results:

• Successful separation of various epimeric UDP-sugar pairs within 10-45 minutes.
• The method demonstrated suitability for analyzing 2-100 nmol of 4'-epimeric UDP-sugars.
• Quantification of 4'-epimeric UDP-amino sugars in rat liver samples was achieved.

Conclusions:

• Borate HPLC provides a fast and effective means for UDP-sugar epimer separation.
• The desalting procedure is essential for accurate analysis of biological samples.
• This HPLC method is valuable for metabolic studies involving UDP-sugars.