Biopolymers for Tissue Engineering: Crosslinking, Printing Techniques, and Applications.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Biotechnology

Background:

• 3D bioprinting aims to create complex, personalized hydrogel structures using bioinks.
• Natural proteins and polysaccharides are favored bioink components due to biocompatibility, biodegradability, and biomimicry.
• The rheological properties of natural bioinks present significant challenges for cell-laden bioprinting.

Purpose of the Study:

• To comprehensively analyze biopolymer-based bioinks for 3D bioprinting.
• To discuss modifications and stimuli-responsive properties of these bioinks.
• To evaluate current challenges and strengths of biopolymers in bioprinting applications.

Main Methods:

• Literature review and analysis of biopolymer-based bioinks.
• Examination of chemical modifications and crosslinking strategies for bioinks.
• Discussion of bioprinting techniques and their impact on hydrogel structures.

Main Results:

• Natural biopolymers offer excellent biocompatibility, biodegradability, and biomimicry for tissue engineering.
• Rheological challenges necessitate chemical modifications and crosslinking for successful bioprinting.
• Stimuli-responsive properties are crucial for controlling bioink behavior during printing.

Conclusions:

• Biopolymer hydrogels aim to mimic extracellular matrix properties for bioprinted constructs.
• Printability and stability during the bioprinting process are key considerations.
• Further research into bioink modifications is essential for advancing 3D bioprinting.