Nanofiber scaffolds support bone regeneration associated with pulp stem cells

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Stem Cell Biology

Background:

• Existing bone grafting alternatives have limitations, necessitating novel solutions for bone regeneration.
• Biodegradable poly (lactic-co-glycolic acid) (PLGA) nanofibers present a potential scaffold material.
• Human mesenchymal stem cells from deciduous teeth pulp (SCDT) are a viable cell source for tissue engineering.

Purpose of the Study:

• To evaluate the bone regeneration capacity of PLGA scaffolds combined with SCDT.
• To assess the cell adhesion and viability of SCDT on PLGA scaffolds.
• To determine the efficacy of this combination in critical-sized bone defects in rats.

Main Methods:

• SCDT were seeded onto PLGA scaffolds (test) or cultured without scaffolds (control) for adhesion and viability assays.
• Critical calvarial defects were created in rats (n=20) and assigned to sham, scaffold-only, or scaffold/SCDT groups.
• Samples were cultured in osteogenic media for 13 days, followed by 60 days of in vivo healing before histomorphometric analysis.

Main Results:

• SCDT exhibited similar adherence and viability on scaffolds compared to controls (p>0.05).
• The combination of PLGA scaffolds and SCDT in osteogenic media significantly enhanced bone formation compared to other groups (p<0.05).
• Histomorphometric analysis confirmed superior bone regeneration in the scaffold/SCDT group.

Conclusions:

• The association of SCDT with biodegradable PLGA scaffolds effectively promotes bone regeneration in a rat calvarial defect model.
• This scaffold/SCDT composite is a promising alternative for bone regeneration strategies in regenerative medicine.
• Further research into clinical applications of this biomaterial-cell construct is warranted.