A Versatile Microfluidic Cryogel Microbead Platform for Modular Biofabrication and Tissue Regeneration.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Microbead-based modular systems are crucial for biofabrication in tissue regeneration.
• Developing injectable and tunable platforms is essential for advanced regenerative strategies.

Purpose of the Study:

• To present a tunable microfluidic cryogel microbead (MCB) platform for injectable, modular assembly.
• To demonstrate the platform's versatility across different tissue types and regenerative applications.

Main Methods:

• Fabrication of microfluidic cryogel microbeads (MCBs) with tunable ECM compositions, porosities, and bioceramic components.
• In vitro assessment of cell viability and function within MCBs.
• In vivo testing in hindlimb ischemia, dorsal skin wound, and cranial bone defect models.

Main Results:

• MCBs support cell viability and function, promoting vascularization in a hindlimb ischemia model when loaded with endothelial cells.
• Skin-derived decellularized ECM incorporation enhances dorsal skin wound regeneration.
• Bioceramic-embedded MCBs facilitate osteogenic differentiation and bone formation in vitro and in vivo.

Conclusions:

• The tunable microfluidic cryogel microbead platform is a versatile tool for regenerative medicine.
• MCBs demonstrate broad translational potential across multiple tissue types, including vascular, skin, and bone regeneration.
• This platform offers a promising approach for injectable, modular tissue engineering strategies.