血管生成
间质细胞
细胞生物学
间充质干细胞
骨钙素
化学
骨髓
体内
缺氧(环境)
骨细胞
碱性磷酸酶
生物
免疫学
癌症研究
生物化学
生物技术
酶
有机化学
氧气
作者
Yi Zhou,Xiaoxu Guan,Huiming Wang,Zhuoli Zhu,Chiquan Li,Shu Wu,Haiyang Yu
摘要
Abstract Osteogenesis and angiogenesis are tightly coupled processes during bone development and formation. It is thus well known that the enhancement of vascularization is of great importance in bone tissue engineering. As a potential approach for repairing bone defects, bone tissue constructs should therefore replicate the essential components in vivo microenvironments to promote cell osteogenic differentiation while at same time induce angiogenic response. In light of standpoint above, a combination of human bone‐derived scaffolds and BMSCs that subjected to hypoxia was used to mimic in vivo conditions. Also the underlying cellular/molecular regulation was fully investigated. The results showed that hypoxia (5–10% O 2 ) greatly enhanced the proliferation of BMSCs seeded in scaffolds, although the hypoxia (5% O 2 )‐induced proliferative effect on BMSC cellular scaffolds was not apparent to those cultured in plates. However, such a kind of model was able to significantly induce the osteogenic/angiogenic responses of BMSCs as reflected by osteogenesis or angiogenesis‐related highly expressed genes or proteins, such as alkaline phosphatase, osteocalcin, hypoxia‐inducible factor‐1α and vascular endothelial growth factor. Moreover, ERK1/2 and/or p38 pathways were demonstrated to play essential roles in hypoxia‐induced osteogenic/angiogenic responses. Our results indicated that the combination of bone‐derived scaffolds, a material that has a three dimensional network structure, and hypoxia, an environment that replicates in vivo BMSCs hypoxic living conditions, may be a potential approach for creating functional tissue‐engineered bone. Biotechnol. Bioeng. 2013; 110: 1794–1804. © 2013 Wiley Periodicals, Inc.
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