Towards a Novel Cost-Effective and Versatile Bioink for 3D-Bioprinting in Tissue Engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Bioprinting Technology

Background:

• 3D bioprinting for tissue regeneration requires hydrogels with specific rheological properties.
• These properties include shear thinning for extrusion, structural stability, and appropriate elastic moduli for cell functions.

Purpose of the Study:

• To introduce a cost-efficient gelatin-methylcellulose based hydrogel.
• To independently optimize rheological properties for printability and tissue engineering.
• To create tunable scaffolds mimicking native cell environments.

Main Methods:

• Development of a gelatin-methylcellulose hydrogel with temperature-dependent viscosity.
• Enzymatic crosslinking to achieve tunable scaffold stiffness (5-50 kPa).
• Assessment of cytocompatibility and cell viability (NIH 3T3 fibroblasts) after bioprinting.

Main Results:

• The hydrogel exhibited optimized viscosity for cell suspension, printing, and structural stability.
• Tunable stiffness allowed biomimicry of various tissue environments.
• High intrinsic cytocompatibility and satisfactory fibroblast viability were demonstrated.

Conclusions:

• This novel hydrogel offers a robust, inexpensive, and adjustable platform for tissue regeneration.
• Potential applications include myocardial and neural tissue engineering.
• The material facilitates improved cell integration and tissue maturation.