Developing scaffolds for tissue engineering using the Ca2+-induced cold gelation by an experimental design approach.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Biopolymer Chemistry

Background:

• Developing biodegradable scaffolds is crucial for tissue engineering applications.
• Protein-based materials offer biocompatibility and tunable properties for regenerative medicine.

Purpose of the Study:

• To investigate the Ca(2+)-induced cold gelation technique for preparing porous, biodegradable scaffolds using BSA and alpha-casein.
• To evaluate the influence of preparation parameters (BSA/casein concentration, pH) on scaffold properties and performance.
• To optimize scaffold characteristics for enhanced tissue engineering applications.

Main Methods:

• Preparation of scaffolds using Ca(2+)-induced cold gelation of BSA and alpha-casein.
• Application of a 2(3) full factorial design to study the impact of key factors on scaffold responses.
• Evaluation of in vitro degradation, swelling ratio, porosity, pore size, and cytotoxicity.

Main Results:

• Scaffold properties (degradation, swelling, porosity, pore size) were significantly influenced by BSA/casein content and pH.
• Optimized conditions (4.19% BSA, 0.69% casein, pH 7.07) yielded high porosity (82.11%) and suitable pore sizes.
• Scaffolds demonstrated excellent biocompatibility, supporting cell adhesion and proliferation with 84% cell viability.

Conclusions:

• The Ca(2+)-induced cold gelation technique is a viable method for producing tunable, porous, biodegradable protein scaffolds.
• The developed scaffolds show promise for various tissue engineering applications due to their controlled properties and biocompatibility.
• Experimental design methodologies are effective for optimizing biomaterial scaffold fabrication and characterization.