Synthesis of eco-friendly multifunctional dextran microbeads for multiplexed assays

Area of Science:

• Biomaterials Science
• Analytical Chemistry
• Environmental Science

Background:

• Multiplexed assays require simultaneous detection of multiple analytes.
• Current microbead platforms often use non-biodegradable synthetic polymers, raising environmental and health concerns.
• There is a need for sustainable, biodegradable alternatives in assay development.

Purpose of the Study:

• To develop an environmentally friendly, biodegradable dextran microbead platform for multiplexed assays.
• To create a novel platform for simultaneous multi-analyte detection with enhanced functionality.
• To address the environmental drawbacks of conventional synthetic polymer microbeads.

Main Methods:

• Synthesis of uniform magnetic dextran microspheres using Shirasu porous glass (SPG) membrane emulsification.
• Coating dextran microbeads with dendrimers via electrostatic adsorption to increase functional groups for ligand conjugation.
• Development of a click chemistry coupling technique for efficient fluorescence encoding of microspheres.

Main Results:

• Successful synthesis of uniform, magnetic dextran microspheres.
• Enhanced surface functionalization achieved through dendrimer coating.
• Demonstrated 3-plex cytokine analysis with high sensitivity, stable coding signals, and low background noise.
• Exhibited excellent biocompatibility of the developed dextran microbeads.

Conclusions:

• Environmentally friendly dextran microbeads provide a viable and sustainable platform for multiplexed assays.
• The developed platform offers high performance in terms of sensitivity, signal stability, and biocompatibility.
• This approach mitigates environmental concerns associated with non-biodegradable assay materials.