Tetracycline-encapsulated P(3HB) microsphere-coated 45S5 Bioglass(®)-based scaffolds for bone tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Drug Delivery Systems

Background:

• Bioglass scaffolds are utilized in bone tissue engineering.
• These scaffolds can be adapted for drug delivery applications.
• Poly(3-hydroxybutyrate) microspheres (PMSs) are suitable drug carriers.

Purpose of the Study:

• To fabricate Bioglass scaffolds with immobilized tetracycline-loaded PMSs.
• To evaluate the drug release profile and cytotoxicity of the developed system.
• To assess the suitability of these scaffolds for bone tissue engineering.

Main Methods:

• Fabrication of tetracycline-loaded PMSs.
• Immobilization of PMSs onto Bioglass scaffolds using a modified slurry dipping technique.
• Assessment of drug release in simulated body fluid via UV-Vis spectroscopy.
• Cytotoxicity evaluation using MTT assay with mouse fibroblast cells.

Main Results:

• Sustained release of tetracycline from PMSs on scaffolds was confirmed.
• The tetracycline-loaded microspheres exhibited limited cytotoxicity.
• The developed scaffolds demonstrated bioactivity, mechanical support, and 3D surface roughness.

Conclusions:

• The Bioglass-based scaffolds with immobilized tetracycline-loaded PMSs offer controlled drug delivery.
• These multifunctional scaffolds are promising candidates for bone tissue engineering applications.
• The system combines structural support with therapeutic drug release capabilities.