Magnetic Mesoporous Bioactive Glass Nanocomposite for Enhanced Osteogenesis and Angiogenesis in Bone Tissue...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Nanotechnology

Background:

• Bone regeneration necessitates coordinated osteogenesis and angiogenesis.
• Existing strategies often lack targeted delivery and controlled release mechanisms.

Purpose of the Study:

• To develop and characterize a magnetic mesoporous bioactive glass nanocomposite (CoBTSp) for enhanced bone tissue regeneration.
• To evaluate the *in vitro* angiogenic and osteogenic potential of CoBTSp.

Main Methods:

• Three-step fabrication: synthesis of Co/B-doped mesoporous bioactive glass nanoparticles, core-shell formation (MBGNs@SiO2), and superparamagnetic iron oxide nanoparticle (SPION) decoration.
• Physicochemical characterization including superparamagnetic property assessment.
• *In vitro* assays to assess biocompatibility, angiogenic (VEGFA, HIF1A, FGF2 gene expression), and osteogenic (RUNX2, COL18A1 gene expression) responses.

Main Results:

• Successful fabrication of CoBTSp with hierarchical structure and superparamagnetic properties.
• CoBTSp demonstrated significant upregulation of key angiogenic and osteogenic genes.
• Enhanced osteoblast differentiation, mineral deposition, and excellent biocompatibility without cytotoxicity or genotoxicity.

Conclusions:

• CoBTSp is a promising platform for bone regeneration, offering controlled ion release and magnetic targeting.
• The nanocomposite effectively stimulates both angiogenic and osteogenic pathways *in vitro*.
• Further *in vivo* studies are warranted to optimize ion levels and clinical application.