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- W2054300135 abstract "Bone morphogenetic proteins (BMPs) are the most potent osteoinductive growth factors. However, a delivery system is essential to take advantage of the osteoinductive effect of BMPs. In the present study, we tested the suitability of apatite-coated poly(D,L-lactide-co-glycolide)/nanohydroxyapatite (PLGA/HA) particulates as carriers for the controlled release of BMP-2. The release of BMP-2 from apatite-coated PLGA/HA particulates was sustained for at least 4 weeks in vitro. A delivery system of apatite-coated PLGA/HA particulates suspended in fibrin gel further slowed the BMP-2 release rate. In vivo implantation of either Fibrin gel + BMP-2 or Fibrin gel + apatite-coated PLGA/HA particulates showed enhanced new bone formation in critical-sized calvarial defects of rats 8 weeks after implantation, compared to implantation of fibrin gel only. Importantly, new bone formation was much higher in the defects treated with BMP-2 delivery using apatite-coated PLGA/HA particulates in fibrin gel (Fibrin gel + PLGA/HA + BMP-2 group) than in the defects treated either with apatite-coated PLGA/HA particulates in fibrin gel (Fibrin gel + BMP-2 group) or with BMP-2 delivery using fibrin gel alone (Fibrin gel + BMP-2 group). BMP-2 and osteoinductive HA had an additive effect on orthotopic bone formation. In conclusion, the apatite-coated PLGA/HA particulates showed good results as carriers for BMP-2. The BMP-2 delivery system showed high osteogenic capability in a rat calvarial bone defect model. The local and sustained delivery system for BMP-2 developed in this study may be useful as a carrier for BMP-2 and would enhance bone regeneration efficacy for the treatment of large bone defects." @default.
- W2054300135 created "2016-06-24" @default.
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- W2054300135 date "2008-01-07" @default.
- W2054300135 modified "2023-10-10" @default.
- W2054300135 title "Orthotopic bone formation by implantation of apatite-coated poly(lactide-<i>co</i>-glycolide)/hydroxyapatite composite particulates and bone morphogenetic protein-2" @default.
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- W2054300135 doi "https://doi.org/10.1002/jbm.a.31782" @default.
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