Bone morphogenetic protein-2 loaded triple helix recombinant collagen-based hydrogels for enhancing bone defect...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Developing effective bone substitute biomaterials is crucial for surgical applications.
• Stimulating bone regeneration in critical-sized defects remains a significant challenge.

Purpose of the Study:

• To construct and evaluate triple helix recombinant collagen (THRC)-based hydrogels for enhanced bone regeneration.
• To investigate the efficacy of THRC-oxidized carboxymethylcellulose (OCMC)-N-succinyl-chitosan (NSC) hydrogels loaded with bone morphogenetic protein-2 (BMP-2) in cranial defects.

Main Methods:

• Synthesized in situ forming THRC-OCMC-NSC hydrogels via Schiff base reaction.
• Characterized hydrogel network structure, pore size, mechanical strength, biodegradability, and swelling properties.
• Assessed hydrogel biocompatibility, bioactivity, and bone regeneration potential in rat cranial defect models using imaging and histological analyses.

Main Results:

• THRC-OCMC-NSC hydrogels exhibited rapid formation, tunable pore sizes, enhanced mechanical strength, biodegradability, and low swelling.
• Hydrogels demonstrated excellent biocompatibility, promoting cell proliferation, adhesion, and differentiation.
• THRC-OCMC-NSC-BMP2 hydrogels significantly promoted new bone formation and accelerated bone regeneration in vivo.

Conclusions:

• The novel THRC-OCMC-NSC-BMP2 hydrogels are promising bone substitute biomaterials.
• These hydrogels show substantial potential for applications in bone repair and regeneration.
• The developed hydrogel system offers a viable strategy for addressing challenges in bone defect treatment.