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Biochem Biophys Res Commun. 2000 Jan 7;267(1):382-7.

Osteoinduction by bone morphogenetic protein-2 via adenoviral vector under transient immunosuppression.

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Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.


To examine the effectiveness of gene transfer of bone morphogenetic protein (BMP)-2 in vivo, we evaluated osteoinduction by an adenoviral vector, AxCAOBMP-2, under transient immunosuppression with an immunosuppression drug (cyclophosphamide), which was given at a dose of 125 mg/kg intraperitoneally the day before vector injection. Twenty-five microliters of AxCAOBMP-2 (8.75 x 10(8) pfu, Group I) and AxCALacZ (1.75 x 10(8) pfu, control group) and 5 microliter of AxCAOBMP-2 (1.75 x 10(8) pfu, Group II) were injected into a right calf muscle. On day 21, induced bone in each group was investigated radiologically, histologically, and biochemically. The finding of osteoinduction was only seen in the AxCAOBMP-2-treated groups with immunosuppression. The activity of osteoinduction in Group I was higher than that in Group II. These results suggest that gene therapy with AxCAOBMP-2 under transient immunosuppression may be useful for bone reconstruction.

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