Efficacy of intraoperatively prepared cell-based constructs for bone regeneration

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Orthopedic Surgery

Background:

• Conventional cell-based bone regeneration faces challenges with cell supply, lengthy expansion, and patient inconvenience.
• Intraoperative cell sourcing offers a more accessible and patient-friendly alternative.

Purpose of the Study:

• To evaluate the feasibility and bone regenerative capacity of intraoperative stromal vascular fraction (SVF) constructs.
• To compare SVF constructs with conventional adipose tissue-derived mesenchymal stem cell (ADMSC) constructs for bone regeneration.

Main Methods:

• Human SVF and monocytes were used for intraoperative construct preparation.
• Constructs were implanted into rat femoral condyle defects and evaluated histologically and histomorphometrically.
• In vitro cellular interactions and immunoregulatory effects were assessed.

Main Results:

• SVF demonstrated comparable in vitro osteogenic differentiation to expanded ADMSCs, enhanced by monocyte co-culture.
• SVF constructs showed superior bone formation in vivo compared to ADMSC constructs.
• Distinct immunoregulatory effects of SVF and ADMSCs on monocytes/macrophages were observed.

Conclusions:

• Intraoperative SVF construct preparation is feasible and yields superior bone regeneration compared to ADMSC constructs.
• The enhanced bone regenerative capacity of SVF is linked to its distinct immunoregulatory properties.