A sequential 3D bioprinting and orthogonal bioconjugation approach for precision tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Biotechnology

Background:

• 3D bioprinting advances tissue engineering but is limited by biomaterial properties.
• Developing printable, cytocompatible biomaterials that mimic native tissues is crucial.

Purpose of the Study:

• To develop an integrated 3D projection bioprinting and orthogonal photoconjugation platform.
• To enable precision tissue engineering with tailored microenvironments and controlled biofabrication.

Main Methods:

• Utilized a photoreactive thiol-ene gelatin bioink with digital light projection (DLP) technology.
• Integrated 3D bioprinting with orthogonal photoconjugation for rapid, scalable photopatterning.
• Localized modulation of hydrogel stiffness, microarchitecture, and functional group immobilization.

Main Results:

• Demonstrated high viability of encapsulated endothelial cells and human cardiomyocytes.
• Fabricated functionalized tissue constructs with VEGF peptide mimics for guided endothelial cell growth.
• Achieved programmable vascularization within engineered tissue constructs.

Conclusions:

• The developed platform offers unprecedented control, precision, and versatility for engineering multifunctional biomimetic tissues.
• This integrated approach facilitates the rational design of tissue-specific functions within bioprinted constructs.
• Represents a pivotal step towards creating advanced living tissues and organs.