Development of bioactive and biodegradable chitosan-based injectable systems containing bioactive glass nanoparticles

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Minimally invasive delivery of cells and bioactive agents is crucial for tissue engineering.
• Biodegradable matrices are needed for effective regenerative strategies.

Purpose of the Study:

• To develop novel injectable thermo-responsive hydrogels for orthopedic applications.
• To combine chitosan-beta-glycerophosphate with bioactive glass nanoparticles.
• To assess the suitability of these hydrogels for intracorporal injection and bone regeneration.

Main Methods:

• Formulation of chitosan-beta-glycerophosphate hydrogels with varying bioactive glass nanoparticle content.
• Rheological analysis to determine injectable properties and gelation points.
• In vitro bioactivity testing via incubation in simulated body fluid (SBF).

Main Results:

• The developed hydrogels exhibited adequate rheological properties and gelation points for injection.
• In vitro tests showed bone-like apatite formation on the hydrogel surface.
• Apatite formation density increased with higher bioactive glass content and SBF incubation time.

Conclusions:

• The novel injectable thermo-responsive hydrogels demonstrate good potential for bone tissue engineering.
• The observed bioactivity suggests suitability as temporary injectable scaffolds for orthopedic reconstruction.
• Further research can explore their use in delivering cells and bioactive agents.