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Antimicrobial and Immunomodulatory Surface-Functionalized Electrospun Membranes for Bone Regeneration
Asha Mathew1, Cedryck Vaquette2, Saeed Hashimi1
1Menzies Health Institute Queensland, School of Dentistry and Oral Health, Griffith University, Gold Coast, 4222, Australia.
Advanced Healthcare Materials
|February 28, 2017
Summary
This study developed an antibacterial membrane for guided bone regeneration (GBR) that prevents infection and enhances bone healing by releasing azithromycin and modulating macrophage responses.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Surgical Innovation
Background:
- Guided bone regeneration (GBR) is crucial for bone defect repair but is susceptible to bacterial infection.
- Current GBR membranes lack antibacterial properties, risking compromised healing.
- Developing infection-resistant GBR materials is essential for improved clinical outcomes.
Purpose of the Study:
- To create and characterize a novel GBR membrane with antibacterial and immunomodulatory functions.
- To evaluate the efficacy of azithromycin-loaded polycaprolactone membranes in vitro and in vivo.
- To assess the impact of the membrane on macrophage polarization and bone regeneration.
Main Methods:
- Fabrication of medical-grade polycaprolactone (mPCL) electrospun membranes.
- Immobilization of azithromycin via solvent evaporation for sustained drug release.
- In vitro testing against Staphylococcus aureus.
- In vivo implantation in rodent calvarial defects to assess macrophage polarization and bone regeneration.
Main Results:
- Sustained release of azithromycin from mPCL membranes over 14 days.
- Effective inhibition of Staphylococcus aureus growth in vitro for 14 days.
- Significant M2 macrophage polarization and enhanced bone regeneration in vivo.
Conclusions:
- The developed antibacterial mPCL membrane effectively prevents infection and promotes bone regeneration.
- Azithromycin-loaded membranes show potential for clinical translation in craniofacial and orthopedic applications.
- The simple drug-loading technique is adaptable for various scaffolds and implants.
