Biodegradable Inks in Indirect Three-Dimensional Bioprinting for Tissue Vascularization.

Area of Science:

• Biomedical Engineering
• Materials Science
• Regenerative Medicine

Background:

• Mature vasculature is essential for bioengineered tissue survival in vivo and in vitro.
• Fabricating fully vascularized tissue constructs is a significant challenge in tissue engineering.
• Indirect 3D bioprinting offers a promising approach for creating complex vascular channels.

Purpose of the Study:

• To review biodegradable materials used in indirect 3D bioprinting for tissue vascularization.
• To summarize recent advances in applying this technique to vascularize various tissues.
• To describe the methodology and material selection for creating vascularized constructs.

Main Methods:

• Indirect three-dimensional (3D) bioprinting utilizing sacrificial molds to create internal pores and channels.
• Selection and characterization of biodegradable scaffold and sacrificial materials.
• Application of the technique to vascularize different tissue types.

Main Results:

• Indirect 3D bioprinting enables the fabrication of complex vascular network-like channels in thick tissue constructs.
• The technique maintains endothelial cell activity during vascular channel creation.
• Biodegradable materials play a critical role as temporary templates and in tissue remodeling.

Conclusions:

• Indirect 3D bioprinting is a key technique for vascularizing engineered tissues.
• Advancements in biodegradable materials will further enhance its contribution to tissue engineering.
• This method holds significant potential for developing functional, vascularized tissue constructs.