MOF-Based Guided Bone Regeneration Membrane for Promoting Osteogenesis by Regulating Bone Microenvironment through...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Bone regeneration is significantly influenced by the bone microenvironment (BME), including pH and ion concentrations.
• Current strategies face challenges in achieving multi-faceted BME regulation for enhanced osteogenesis.

Purpose of the Study:

• To develop a facilely-designed resorbable guided bone regeneration membrane for synergistic BME modulation.
• To investigate the cascade effects of released components on osteoblasts and osteoclasts for improved bone regeneration.

Main Methods:

• Fabrication of a polycaprolactone (PCL) based membrane incorporating a drug-loaded metal-organic framework (MOF) (PCL/DEX@Ca-Zol).
• Incorporation of calcium ions, zoledronic acid, and dexamethasone within the MOF for acid-triggered release.
• Evaluation of the membrane's ability to neutralize pH, promote osteogenic differentiation and mineralization, and inhibit osteoclast activity.

Main Results:

• The PCL/DEX@Ca-Zol membrane demonstrated acid-triggered release of active components in bone defects.
• Synergistic regulation of BME was achieved, including pH neutralization and enhanced osteogenic activity.
• Effective inhibition of osteoclast activity and promotion of bone regeneration with minimized side effects were observed.

Conclusions:

• The developed guided bone regeneration membrane offers a facile approach for multi-component, cascade-effect BME modulation.
• This strategy significantly enhances osteogenesis and bone regeneration by addressing multiple factors within the BME.
• The PCL/DEX@Ca-Zol membrane shows promise for clinical applications in bone defect repair.