Mechanical Properties and Microstructure of Decellularized Brown Seaweed Scaffold for Tissue Engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Marine Biotechnology

Background:

• Growing demand for sustainable biomaterials in tissue engineering.
• Need for advanced scaffolds that preserve structural integrity.
• Potential of brown seaweed as a source for biomaterials.

Purpose of the Study:

• Investigate the potential of brown seaweed scaffolds derived from Laminaria digitata (L.D.) and Laminaria saccharina (L.S.).
• Evaluate a novel detergent-free, visible-light decellularization process for preserving scaffold integrity.
• Assess the impact of decellularization on scaffold porosity, mechanical properties, and fluid absorption.

Main Methods:

• Brown seaweed blades (L.D. and L.S.) were decellularized using cold flow-through, aerated water with red and blue light exposure for 4 weeks.
• Histology, SEM, and micro-CT were used to analyze scaffold structure and porosity.
• Tensile testing evaluated mechanical properties, while chemical analysis assessed composition. Swelling and fluid absorption were also measured.

Main Results:

• Visible-light decellularization effectively removed cells and debris while maintaining essential structural features.
• Scaffold porosity significantly increased post-decellularization.
• Tensile strength substantially increased: L.D. from 3.4 MPa to 8.7 MPa; L.S. from 2.1 MPa to 6.6 MPa.
• Decellularized scaffolds exhibited altered polysaccharide and protein composition, high swelling, and fluid absorption capacities.

Conclusions:

• Decellularized L.D. and L.S. seaweed scaffolds preserve structural integrity.
• Enhanced mechanical properties, interconnected porous structures, and significant liquid retention were observed.
• These scaffolds are promising biomaterial candidates for soft-tissue reinforcement, wound care, and regenerative medicine.