Bone regeneration by polyhedral microcrystals from silkworm virus.

Bone regeneration by polyhedral microcrystals from silkworm virus.
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DOI:
10.1038/srep00935
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Mori, Hajime
Mori, Hajime
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Matsumoto, Goichi;Ueda, Takayo;Shimoyama, Junko;Ijiri, Hiroshi;Omi, Yasushi;Yube, Hisato;Sugita, Yoshihiko;Kubo, Katsutoshi;Maeda, Hatsuhiko;Kinoshita, Yukihiko;Gaviria Arias, Duvemey;Shimabukuro, Junji;Kotani, Eiji;Kawamata, Shin;Mori, Hajime

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Bombyx mori cypovirus is a major pathogen which causes significant losses in silkworm cocoon harvests because the virus particles are embedded in micrometer-sized protein crystals called polyhedra and can remain infectious in harsh environmental conditions for years. But the remarkable stability of polyhedra can be applied on slow-release carriers of cytokines for tissue engineering. Here we show the complete healing in critical-sized bone defects by bone morphogenetic protein-2 (BMP-2) encapsulated polyhedra. Although absorbable collagen sponge (ACS) safely and effectively delivers recombinant human BMP-2 (rhBMP-2) into healing tissue, the current therapeutic regimens release rhBMP-2 at an initially high rate after which the rate declines rapidly. ACS impregnated with BMP-2 polyhedra had enough osteogenic activity to promote complete healing in critical-sized bone defects, but ACS with a high dose of rhBMP-2 showed incomplete bone healing, indicating that polyhedral microcrystals containing BMP-2 promise to advance the state of the art of bone healing.
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