Brake-Drive Osteo System: Sequential Modulation of the Inflammatory Microenvironment and Osteogenesis for...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Immunology

Background:

• Osteoporotic bone defects present challenges due to chronic inflammation and poor bone formation.
• Existing scaffolds struggle to manage the inflammatory environment and coordinate healing signals.

Purpose of the Study:

• To develop a novel biomaterial scaffold for osteoporotic bone regeneration.
• To create a system that sequentially regulates inflammation and promotes osteogenesis.

Main Methods:

• Developed a calcium phosphate scaffold (BCP-T/N@Q/V) integrating quercetin and teriparatide.
• Investigated the scaffold's effect on macrophage phenotype and osteogenic differentiation.
• Evaluated bone regeneration in a rat osteoporotic femoral condyle defect model.

Main Results:

• The scaffold sequentially released quercetin to reduce inflammation and teriparatide to promote osteogenesis.
• Successfully reprogrammed macrophages towards a pro-regenerative state, reducing inflammatory stress.
• Demonstrated enhanced osteogenic commitment and maturation of stem cells.
• Achieved accelerated and structurally integrated bone regeneration in vivo.

Conclusions:

• The