Bioorthogonal in Situ Hydrogels Based on Polyether Polyols for New Biosensor Materials with High Sensitivity

Area of Science:

• Biomaterials Science
• Biosensor Technology
• Bioorthogonal Chemistry

Background:

• Conventional biosensor surfaces face limitations in biomolecule loading and stability.
• Unspecific interactions and protein denaturation can compromise biosensor performance.

Purpose of the Study:

• To investigate the encapsulation of biomolecules (proteins, oligonucleotides) in a novel hydrogel matrix.
• To develop a biosensor surface using in situ bioorthogonal hydrogel formation.
• To enhance biomolecule loading and stability in biosensor applications.

Main Methods:

• Utilized strain-promoted azide-alkyne cycloaddition for in situ bioorthogonal hydrogel formation.
• Encapsulated both noncovalent and covalent active biomolecules within the hydrogel.
• Assessed biomolecule stability, interaction, and loading capacity compared to conventional surfaces.

Main Results:

• Achieved stable, non-leaching encapsulation of active biomolecules within the hydrogel.
• Prevented unspecific interactions and protein denaturation through bioorthogonal gel components.
• Demonstrated significantly higher and adjustable biomolecule loading compared to 2D and 3D surfaces.
• Confirmed hydrogel suitability for microarray-based multiplex applications with high signal-to-noise ratios.

Conclusions:

• The developed bioorthogonal hydrogel offers a superior matrix for biosensor development.
• This approach enhances biomolecule stability and loading, enabling advanced multiplexed sensing.
• The technology holds promise for high-performance biosensor applications.