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- W2079664566 abstract "Non-collagenous phosphoproteins that interact with a type-I collagen are thought to nucleate bone mineral into collagen networks of mineralized tissues. Previously, phosphophoryn cross-linked to type-I collagen was reported to be an effective nucleator of appatite. However, free phosphophoryn molecules inhibit the formation of apatite in vitro. On the basis of the above study, we expected a collagen-phosphophoryn sponge to be a good scaffold for bone-tissue engineering and examined the formation of bone in orthotopically transplanted composites of the sponge and bone marrow osteoblasts in vivo in Fischer rats. Osteoblastic primary cells were obtained from the bone shaft of femorae of Fisher rats, according to the method of Maniatopoulous et al. A suspension of marrow cells was distributed through a flask with standard culture medium and incubated at 37°C. When cultures were nearly confluent after 10 days, they were concentrated by centrifugation to 106 cells/ml and subcultured onto the synthesized collagen-phosphophoryn sponge and a collagen sponge (control). After 14 days, the composites of collagen-phosphophoryn and osteoblastic cells as well as control composites were transplanted into bone-defect sites of Fisher rats (holes 2 mm in diameter) and then the wounds were sutured. The composites were harvested at 1-8 weeks after implantation, and stained with hematoxylin and eosin. It was found that more bone was formed in the composites of collagen-phosphophoryn sponge and osteoblasts than control composites from 1 week to 8 weeks, suggesting that the collagen-phosphophoryn sponge is a good candidate as a scaffold for bone-tissue engineering." @default.
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- W2079664566 date "2003-01-01" @default.
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- W2079664566 title "A collagen–phosphophoryn sponge as a scaffold for bone tissue engineering" @default.
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- W2079664566 doi "https://doi.org/10.1163/156856203769231583" @default.
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