Construction of a 19F-lectin biosensor for glycoprotein imaging by using affinity-guided DMAP chemistry

Area of Science:

• Biochemistry
• Chemical Biology
• Medical Imaging

Background:

• Glycoproteins play crucial roles in various biological processes.
• Specific detection and imaging of glycoproteins are essential for understanding their functions and diagnosing diseases.
• Existing methods for glycoprotein detection and imaging have limitations in specificity and sensitivity.

Purpose of the Study:

• To develop a novel biosensor for specific detection and imaging of glycoproteins.
• To utilize fluorine-19 ((19)F) NMR and MRI for glycoprotein analysis.
• To differentiate glycoproteins from small molecule saccharides.

Main Methods:

• Development of a novel (19)F-modified lectin biosensor using an affinity-guided DMAP strategy.
• Exploitation of the large chemical shift anisotropy property of (19)F nuclei.
• Application of (19)F NMR for detecting glycoproteins via signal broadening.
• Utilization of (19)F MRI for glycoprotein imaging with signal on/off switching.

Main Results:

• The (19)F-modified lectin biosensor specifically detected glycoproteins.
• Glycoproteins were distinguished from small molecule saccharides by characteristic broadened peaks in (19)F NMR.
• The biosensor enabled signal on/off switching for glycoprotein imaging using (19)F MRI.

Conclusions:

• A novel (19)F-modified lectin biosensor was successfully developed for glycoprotein detection and imaging.
• The biosensor offers a specific and sensitive method for distinguishing glycoproteins from other saccharides.
• The developed technology holds potential for advancing glycoprotein analysis in biological research and clinical diagnostics.