Microfluidic Bioprinting for Engineering Vascularized Tissues and Organoids

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Microfluidics

Background:

• Engineering vascularized tissue constructs and organoids presents significant challenges.
• Existing methods often struggle with high fidelity and vascular network formation.

Purpose of the Study:

• To develop a novel microfluidic bioprinting method for creating vascularized tissue scaffolds.
• To engineer a scaffold with multilayer interlacing hydrogel microfibers for vascularization.

Main Methods:

• A core-sheath microfluidic printhead was designed for smooth bioprinting.
• A composite bioink of gelatin methacryloyl (GelMA) and alginate was used.
• Dual crosslinking (ionic and photocrosslinking) was employed for scaffold stabilization.

Main Results:

• The bioprinting strategy successfully generated a microfibrous scaffold.
• Encapsulated endothelial cells formed lumen-like structures resembling vasculature within 16 days.
• The scaffold demonstrated potential as a vascular bed for further tissue construction.

Conclusions:

• Microfluidic bioprinting offers a generalized and high-fidelity strategy for engineering vascularized tissues.
• This method facilitates the convenient construction of complex vascular networks.
• The developed scaffold shows promise for advanced tissue engineering applications.