Neovascularization and bone regeneration by implantation of autologous bone marrow mononuclear cells

We examined whether transplantation of autologous bone marrow mononuclear cells (BM-MNCs) can augment neovascularization and bone regeneration of bone marrow in femoral bone defects of rabbits. Gelatin microspheres containing basic fibroblast growth factor (bFGF) were prepared for the controlled rel...

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Bibliographic Details
Published in:Biomaterials 2005-08, Vol.26 (22), p.4550-4556
Main Authors: Hisatome, Takashi, Yasunaga, Yuji, Yanada, Shinobu, Tabata, Yasuhiko, Ikada, Yoshito, Ochi, Mitsuo
Format: Article
Language:English
Subjects:
Animals
bFGF
Bone Marrow Cells
Bone marrow mononuclear cells
Bone Regeneration
Cell Transplantation
Female
Gelatin microsphere bFGF
Monocytes - cytology
Neovascularization
Neovascularization, Physiologic
Rabbits
Transplantation, Autologous
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Summary:We examined whether transplantation of autologous bone marrow mononuclear cells (BM-MNCs) can augment neovascularization and bone regeneration of bone marrow in femoral bone defects of rabbits. Gelatin microspheres containing basic fibroblast growth factor (bFGF) were prepared for the controlled release of bFGF. To evaluate the in vivo effect of implanted BM-MNCs, we created bone defects in the rabbit medial femoral condyle, and implanted into them 5×10 6 fluorescent-labeled autologous BM-MNCs together with gelatin microspheres containing 10 μg bFGF on an atelocollagen gel scaffold. The four experimental groups, which were Atelocollagen gel (Col), Col+5×10 6 BM-MNCs, Col+10 μg bFGF, and Col+5×10 6 BM-MNCs+10 μg bFGF, were implanted into the sites of the prepared defects using Atelocollagen gel as a scaffold. The autologous BM-MNCs expressed CD31, an endothelial lineage cell marker, and induced efficient neovascularization at the implanted site 2 weeks after implantation. Capillary density in Col+BM-MNCs+bFGF was significantly large compared with other groups. This combination also enhanced regeneration of the bone defect after 8 weeks to a significantly greater extent than either BM-MNCs or bFGF on their own. In summary, these findings demonstrate that a combination of BM-MNCs and bFGF gelatin hydrogel enhance the neovascularization and the osteoinductive ability, resulting in bone regeneration.
ISSN:0142-9612
1878-5905
DOI:10.1016/j.biomaterials.2004.11.032