2004 Fiscal Year Final Research Report Summary
Neovascularization and bone regeneration by implantation of autologous bone marrow mononuclear cells for osteonecrosis
| Project/Area Number |
15591576
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Orthopaedic surgery
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
YASUNAGA Yuji Hiroshima University, Graduate School of Biomedical Sciences, Associate professor, 大学院・医歯薬学総合研究科, 助教授 (40253075)
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| Co-Investigator(Kenkyū-buntansha) |
OCHI Mitsuo Hiroshima University, Graduate School of Biomedical Sciences, Professor, 大学院・医歯薬学総合研究科, 教授 (70177244)
MOCHIZUKI Yu Hiroshima University, Graduate School of Biomedical Sciences, Assistant, 大学院・医歯薬学総合研究科, 助手 (10284192)
HISATOME Takashi Hiroshima University, Hospital, Medical Staff(doctor), 病院・医員
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| Project Period (FY) |
2003 – 2004
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| Keywords | Neovascularization / basic FGF / Bone regeneration / Bone marrow mononuclear cells / Gelatin microspheres bFGF |
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| Research Abstract |
We examined whether transplantation of autologous bone marrow mononuclear cells (BM-MNCs) can augment neovasculalization 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 two 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 eight 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.
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Research Products
(2 results)
