3D-Printed Hybrid Collagen/GelMA Hydrogels for Tissue Engineering Applications.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Bioprinting Technology

Background:

• Bioprinting aims to create 3D tissue constructs for regeneration.
• Collagen, a key extracellular matrix protein, has poor printability.
• Gelatin Methacrylate (GelMA) improves bioprinting properties.

Purpose of the Study:

• To develop and compare hybrid hydrogels using GelMA with ovine and bovine collagen for bioprinting.
• To investigate the effect of collagen source and concentration on hybrid mesh properties.
• To identify optimal formulations for stable, biocompatible scaffolds.

Main Methods:

• Hybrid hydrogel inks were formulated with 8% GelMA and 0.5%, 1%, or 2% ovine or bovine collagen.
• Hydrogel inks were bioprinted into mesh structures.
• Properties including printability, mechanical characteristics, and degradation rates were analyzed.

Main Results:

• Hybrid hydrogels with up to 1% collagen concentration showed stable properties.
• Ovine collagen resulted in faster degradation due to its water-soluble nature.
• Hybrid meshes with 1% bovine collagen exhibited the most stable degradation rates.

Conclusions:

• Combining GelMA with bovine collagen at 1% concentration creates promising hybrid hydrogels for bioprinting.
• These hybrid meshes offer enhanced properties and stable degradation for tissue regeneration applications.
• This research advances the development of biomimetic scaffolds for tissue engineering.