Dual Factor-Loaded Artificial Periosteum Accelerates Bone Regeneration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Orthopedic Oncology

Background:

• Microwave ablation for osteosarcoma can damage the periosteum, leading to complications.
• Developing an artificial periosteum is essential for effective postoperative healing and bone regeneration.

Purpose of the Study:

• To create a silk fibroin-based artificial periosteum.
• To incorporate stromal cell-derived factor-1α (SDF-1α) and calcitonin gene-related peptide (CGRP) for enhanced bone remodeling.
• To evaluate its efficacy in promoting bone regeneration after osteosarcoma ablation.

Main Methods:

• Prepared silk fibroin (SF) artificial periosteum loaded with SDF-1α and CGRP.
• Assessed sustained release of growth factors over 14 days.
• Conducted in vitro studies with rat periosteal stem cells (rPDSCs) and human umbilical vein endothelial cells (HUVECs).
• Performed in vivo animal studies using rabbits with ablated periosteum.

Main Results:

• Sustained release of SDF-1α and CGRP observed for 14 days.
• Artificial periosteum supported rPDSC recruitment, alkaline phosphatase activity, and bone-related gene expression.
• Enhanced angiogenesis and tube formation in HUVECs.
• Demonstrated improved bone regeneration in rabbit femur defect models.

Conclusions:

• The dual-factor-loaded artificial periosteum is a viable strategy for periosteum replacement.
• It effectively promotes bone regeneration and healing post-osteosarcoma microwave ablation.
• This approach offers a promising solution for mitigating postoperative complications and improving bone rebuilding.