Microfluidic Synthesis of Microgel Building Blocks for Microporous Annealed Particle Scaffold.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Microporous annealed particle (MAP) scaffolds are a subclass of granular hydrogels.
• These scaffolds are injectable and form stable structures with cell-scale porosity in situ via light-based crosslinking (annealing).
• MAP scaffolds have demonstrated efficacy in dermal wound healing, vocal fold augmentation, and stem cell delivery.

Purpose of the Study:

• To describe the synthesis and characterization methods for poly(ethylene glycol) (PEG) microgels.
• To establish these microgels as building blocks for MAP scaffolds.
• To detail high-throughput microfluidic methods for scalable microgel production.

Main Methods:

• Synthesis of a custom annealing macromer (MethMAL).
• Determination of microgel precursor gelation kinetics.
• Microfluidic device fabrication and microgel generation.
• Microgel purification and scaffold characterization (sizing, annealing).

Main Results:

• Established methods for synthesizing PEG microgels for MAP scaffold construction.
• Demonstrated high-throughput microfluidic techniques for producing large volumes of microgels.
• Characterized microgel properties and scaffold formation parameters.

Conclusions:

• The described methods enable the production of PEG-based microgels suitable for MAP scaffold fabrication.
• High-throughput microfluidics offer a scalable approach for generating microgels for diverse regenerative medicine applications.
• This work provides a foundation for utilizing MAP scaffolds in various therapeutic areas.