Dual-Crosslinked Alginate-Based Hydrogels with Tunable Mechanical Properties for Cultured Meat

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Food Science

Background:

• Cultured meat production relies on tissue engineering techniques for in vitro animal tissue growth.
• Biomaterials are crucial for supporting cell viability, growth, and migration in cultured meat scaffolds.
• Controlling scaffold properties is essential for successful in vitro meat fabrication.

Purpose of the Study:

• To design and synthesize visible light and dual-crosslinked alginate hydrogels for cultured meat scaffolds.
• To investigate the influence of hydrogel stiffness on cell behavior for optimizing cultured meat production.
• To evaluate the material, mechanical, and cytocompatibility properties of novel alginate-based hydrogels.

Main Methods:

• Synthesized methacrylated alginate (AlgMA) and methacrylated alginate with RGD conjugates (AlgMA-RGD).
• Fabricated hydrogels using visible light and dual-crosslinking techniques with varying polymer concentrations.
• Assessed material properties (gelation, swell ratio, weight loss) and mechanical properties (compressive moduli).
• Conducted in vitro cell assays using muscle satellite cells to evaluate cytocompatibility and cell adhesion.

Main Results:

• Alginate hydrogels exhibited tunable mechanical properties by adjusting polymer concentration and crosslinking methods.
• Dual-crosslinking significantly enhanced the compressive moduli of AlgMA hydrogels compared to visible-light crosslinking alone.
• Muscle satellite cells demonstrated favorable responses and differential cell density based on scaffold stiffness.
• The developed hydrogels showed good cytocompatibility and supported cell adhesion.

Conclusions:

• The dual-crosslinking alginate hydrogel system offers controllable mechanical properties for cultured meat scaffolds.
• Hydrogel stiffness plays a significant role in modulating muscle satellite cell behavior in vitro.
• This approach provides a promising platform for advancing the field of cultured meat production.