Photoencapsulated-BMP2 in visible light-cured thiol-acrylate hydrogels for craniofacial bone tissue engineering.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Biodegradable hydrogels offer promising scaffolds for tissue regeneration.
• Bone morphogenetic protein 2 (BMP2) is crucial for osteogenesis.
• Visible light-cured thiol-acrylate hydrogels provide tunable properties for cell encapsulation.

Purpose of the Study:

• To investigate the effect of photoencapsulated BMP2 within thiol-acrylate hydrogels on bone marrow stromal cells (BMSC).
• To evaluate the potential of these hydrogels for craniofacial bone tissue engineering.

Main Methods:

• BMP2 was photoencapsulated into 10 wt% PEG-diacrylate hydrogels.
• Hydrogels were fabricated using visible light-curing.
• Immortalized mouse bone marrow stromal cells (BMSC) were encapsulated with or without BMP2.
• Cell metabolic activity and alkaline phosphatase (ALP) activity were assessed.

Main Results:

• Photoencapsulated BMSC with BMP2 (BMBMP2) exhibited a 54.61% increase in metabolic activity at day 3 compared to BMSC alone.
• BMBMP2 groups showed significantly higher ALP activity at days 1, 3, 7, and 10 compared to BMSC groups.
• Statistical significance was observed (p < 0.05 for metabolic activity, p < 0.01 or p < 0.05 for ALP activity).

Conclusions:

• Photoencapsulation of BMP2 within thiol-acrylate hydrogels enhances BMSC metabolic and osteogenic activity.
• This approach shows significant potential for craniofacial bone tissue engineering applications.
• Visible light-cured thiol-acrylate hydrogels are a viable platform for delivering osteogenic factors.