Serum protein fractionation using supported molecular matrix electrophoresis

Area of Science:

• Biochemistry
• Analytical Chemistry
• Biotechnology

Background:

• Supported molecular matrix electrophoresis (SMME) is a novel technique using a hydrophilic polymer within a PVDF membrane.
• It offers advantages over traditional methods, particularly in compatibility with glycan analysis.

Purpose of the Study:

• To apply SMME for the first time to human serum fractionation.
• To compare SMME serum fractionation with cellulose acetate membrane electrophoresis.
• To demonstrate the utility of SMME for subsequent glycan analysis.

Main Methods:

• Human serum fractionation using SMME with a polyvinyl alcohol (PVA) matrix in a porous polyvinylidene fluoride (PVDF) membrane.
• Electrophoresis with minimal electroosmotic flow (EOF).
• Visualization via Direct Blue-71 staining, densitometry, immunostaining, and mass spectrometric analysis of glycans.

Main Results:

• SMME successfully fractionated human serum, yielding results comparable to cellulose acetate membrane electrophoresis.
• The SMME membrane showed negligible EOF, simplifying analysis.
• Successful visualization, quantification, immunostaining, and glycan profiling (N-linked and O-linked) of separated fractions were achieved.

Conclusions:

• SMME is a viable and effective method for human serum fractionation.
• The technique's compatibility with glycan analysis opens new avenues for understanding glycosylation profiles in disease.
• SMME facilitates novel insights into the relationship between glycosylation and disease states.