Bone Repair and Regeneration
Although most bone fractures have remarkable reparative potential to heal common injuries on their own, or with well establish clinical interventions, the same is not true for large segmental defects caused by trauma or bone cancers. To address these major unmet clinical need, we proposed a
Revitalizing Allograft solution (Nature Medicine, 2005), which was received with broad enthusiasm, and appeared on the covers of Molecular Therapy and the Journal of Orthopaedic Research.
Pictured Right: 3D segmentation of micro-CT scans of murine femoral allograft that were coated with a placebo (top) and active (bottom) gene therapy. The scans of the healing allograft (left) are segmented to separate the allograft bone (middle) from the new bone that formed (right) as described in (Koefoed et al., 2005).
The essence of this technology is an allograft from a cadaver (i.e. femur, tibia), which remains the standard of care to bridge critical defects, and a recombinant adeno-associated virus (rAAV) surface coating that introduces angiogenic, cellular proliferation, differentiation and/or remodeling signals into the injury site to facilitate bone regeneration. Based on the remarkable success of this technology in mice, the lab is now working towards evaluating rAAV-coated allografts in a canine femur model using clinically relevant cone beam computed tomography (CB-CT) outcome measures.
Pictured Left: Schematic model of strategies that combine stem cell technology and gene therapy to tissue engineer bone as described in (Corsi et al., 2007).
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