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Rabbit tibial periosteum and saphenous arteriovenous vascular bundle as an in vivo bioreactor to construct vascularized tissue-engineered bone: A feasibility study

机译:兔胫骨骨膜和大隐静脉动静脉束作为体内生物反应器构建血管化组织工程骨的可行性研究

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摘要

The aim of this project was to construct vascularized tissue-engineered living bone with an autologous vascular network by means of a rabbit bioreactor in vivo. The key components of the in vivo bioreactor for bone formation were the vascularized tibial periosteum and the saphenous vascular bundle. Beta-tricalcium phosphate (β-TCP) scaffolds were implanted into the in vivo bioreactor (vascular pedicle implantation and vascularized periosteum encapsulation). At 4 weeks postsurgery, new bone formation was mainly "cartilage-bone inducing" in the inner periosteum, and was primarily seen in the outer aspects of the scaffold with some amount in the middle part as well. Microvascular infusion showed that direct revascularization of β-TCP was obtained by means of vascular implantation. Triple staining results showed a large amount of blue collagen fibers. Vascular endothelial growth factor immunohistochemical staining displayed endothelial cells of new blood vessels in bone tissue. The bioreactor established in this study can be used to prepare tissue-engineered bone with a vascular network.
机译:该项目的目的是在体内通过兔生物反应器构建具有自体血管网络的血管化组织工程化的活骨。用于骨形成的体内生物反应器的关键组件是血管化的胫骨骨膜和隐性血管束。将β-磷酸三钙(β-TCP)支架植入体内生物反应器(血管蒂植入和血管化骨膜包埋)。术后4周,新骨形成主要是在骨膜内层“诱导骨软骨”,并且主要在支架的外部看到,中间部分也有一定量。微血管输注显示,通过血管植入获得了β-TCP的直接血运重建。三重染色结果显示大量蓝色胶原纤维。血管内皮生长因子免疫组织化学染色显示骨组织中新血管的内皮细胞。在这项研究中建立的生物反应器可用于制备具有血管网络的组织工程骨。

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