Determination of Fucose Concentration in a Lectin-Based Displacement Microfluidic Assay.

Area of Science:

• Biochemistry
• Analytical Chemistry
• Biotechnology

Background:

• Accurate quantification of monosaccharides like fucose is crucial in biological and medical research.
• Traditional methods can be time-consuming and lack real-time kinetic data.
• Developing rapid and sensitive analytical platforms is an ongoing challenge.

Purpose of the Study:

• To compare the efficacy of three distinct methods for quantifying fucose.
• To evaluate microfluidic assays against a conventional static ELISA for fucose detection.
• To assess the potential of microfluidic platforms for developing one-step analytical systems.

Main Methods:

• Comparison of two microfluidic displacement assays (fluorescence and Surface Plasmon Resonance - SPR) with a static displacement Enzyme-Linked Immunosorbent Assay (ELISA).
• Utilized immobilized S2-AAL, a polypeptide based on Aleuria aurantia lectin, as the stationary binding site.
• Quantification based on the displacement of the glycoprotein lactoferrin by fucose.

Main Results:

• All three assays demonstrated a comparable dynamic range for fucose quantification.
• Microfluidic assays, particularly those employing fluorescence or SPR detection, exhibited significantly shorter analysis times.
• The microfluidic displacement assays provided continuous data, offering insights into interaction kinetics.

Conclusions:

• Microfluidic assays offer a significant advantage over static ELISA due to reduced analysis times for fucose quantification.
• The developed microfluidic displacement assays hold promise for creating efficient one-step analytical platforms.
• These findings pave the way for faster and more informative saccharide analysis in various applications.