Boron containing poly-(lactide-co-glycolide) (PLGA) scaffolds for bone tissue engineering

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Orthopedic Engineering

Background:

• Scaffold-based bone defect reconstruction faces challenges with insufficient osteoinduction and osteoconduction.
• Biocompatible scaffolds combined with cells and biochemical signals are key in hard tissue engineering.

Purpose of the Study:

• To evaluate the effect of boron incorporation into poly-(lactide-co-glycolide-acid) (PLGA) scaffolds on bone healing.
• To assess the impact of boron-PLGA scaffolds, with or without rat adipose-derived stem cells (rADSCs), on bone regeneration in vitro and in vivo.

Main Methods:

• Incorporation of boron into PLGA scaffolds.
• In vitro assessment of rADSC proliferation, attachment, and mineralization on scaffolds.
• In vivo evaluation of femur defects using boron-PLGA scaffolds with or without rADSCs.
• Analysis of protein levels (osteocalcin, VEGF, collagen type I), bone mineralization density (BMD), and computed tomography (CT).

Main Results:

• Boron-containing scaffolds enhanced in vitro rADSC proliferation, attachment, and calcium mineralization.
• In vivo, boron scaffolds increased bone regeneration markers and accelerated healing in a femur defect model.
• Co-administration of rADSCs with boron scaffolds further improved bone healing outcomes compared to controls.

Conclusions:

• Boron incorporation into PLGA scaffolds is a promising strategy for enhancing bone regeneration.
• Boron-modified scaffolds, especially when combined with stem cells, show significant potential for bone tissue engineering applications.
• Further investigation into the mechanical properties of these scaffolds is recommended for clinical translation.