Abstract
This study examines the clinical relevance of tissue engineering integrating gene therapy and polymer science to bone regeneration. Bilateral maxillary defects (3 × 1.2 cm2) in 20 miniature swine were bridged with a bioresorbable internal splint. Constructs were created using ex vivo adenovirus bone morphogenetic protein (BMP)-2-mediated gene transfer to the expanded bone marrow mesenchymal stem cells (MSCs) 7 days before implantation. Controls were performed using adenovirus β-galactosidase. The BMP-2 cell/construct displayed white solid bone formation after 3 months. Meanwhile, the hematoxylin and eosin and Von Kossa stains demonstrated exhibited mature woven bone with good mineralization. Additionally, three-dimensional computer tomography imaging revealed a nearly complete infraorbital rim repair. Quantitative analysis demonstrated a significant difference (P<0.001) in bone formation. Finally, biomechanical testing revealed no statistically significant difference in the maximal compressive strength of new bone formed by BMP-2 cell constructs and the normal maxilla. The data evidenced de novo bone formation capable of sustaining axial compressive loads. The measurement results showed that ex vivo replication defective adenovirus-mediated human BMP-2 gene transfer to MSCs enhances autologous bone formation in the repair of maxillary defects.
Original language | English |
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Pages (from-to) | 2013-2019 |
Number of pages | 7 |
Journal | Gene Therapy |
Volume | 10 |
Issue number | 24 |
DOIs | |
State | Published - 11 2003 |
Keywords
- Bone regeneration
- Stem cells
- Tissue engineering