After long time research, there are plenty of implantation experiments of tissue engineered bone. However, there were no blood vessels or cell component of blood vessels in the existing tissue engineered bone. The limitation of vascularization is one of the key problems to keep tissue engineered bone from applying in clinic. Vascularization is a critical factor for tissue engineered bone alive and conduct its function. To vascularize the tissue engineered bone becomes the key point of bone regeneration and bone repair research. We plan to construct a bone scaffold with blood vessels in this project. Intergrated 3D inkjet bioprinting technique make this come ture. Prefabricated bioink of blood vessels phase and bone phase,tissue engineering bone was printed integratly. The vessel phase containing endothelial cell can be induced to central blood vessels, while the bone phase containing endothelial cell and osteoblastic stem cell can be induced to traffic blood vessels and osteoid tissue by programmatic differentiation technique. Intergrated 3D inkjet bioprinting technique is a novel technique for tissue engineering. Tissue engeering bone with blood vessels will be systematicly investigated and the effect of repairing bone defect will be studied. The achievement will provide experimental evidences and example for clinic applying of tissue engineered bone.
通过长期研究,体外构建的组织工程骨已进行过大量的体内植入试验。但是,现有的组织工程骨内没有现成的血管网,同时也没有组成血管的细胞,在体内血管化程度有限,是阻碍组织工程骨应用的最大障碍之一。移植物的血管化是骨组织再生成功与否的决定因素。生物活性骨的快速血管化问题,成为骨再生和骨修复研究的重要课题。针对血管化问题,申请者提出在体外一体化构建组织工程骨及其内部血管系统的设想。本研究采用一体化3D喷墨生物打印技术,构建预制血管网络的组织工程骨。在体外预制好血管相及骨相的生物墨水,再一体化3D打印组织工程骨。血管相中的内皮细胞可发展成为类似中央血管,骨相中种植的内皮细胞和成骨干细胞可以诱导成类似交通血管网及骨质。申请者掌握的程序化诱导技术让这一设想成为可能。本研究将采用全新一体化3D喷墨生物打印技术构建预制血管网络组织工程骨,并了解其修复大段骨缺损疗效,为以后临床治疗骨缺损提供新的思路及理论依据。
通过长期研究,体外构建的组织工程骨已进行过大量的体内植入试验。现有的组织工程骨内没有现成的血管网,同时也没有组成血管的细胞,在体内血管化程度有限,是阻碍组织工程骨应用的最大障碍之一。移植物的血管化是骨组织再生成功与否的决定因素。生物活性骨的快速血管化问题,成为骨再生和骨修复研究的重要课题。针对血管化问题,提出在体外一体化构建组织工程骨及其内部血管系统的设想。本研究部分完成生物墨水的开发, 完成通过软件设定组织工程骨内中央血管网络和交通血管网络设计,完成预制血管网系统。有效完成具有预制血管网系统的组织工程骨的制作。完成程序化培养技术对预制血管网络系统组织工程骨的成骨诱导和成血管诱导效果 部分完成通过体内修试验,检测和分析具有预制血管网络系统的组织工程骨修复大段骨缺损的效果,为临床治疗大段骨缺损提供新的理论基础和治疗方案。
{{i.achievement_title}}
数据更新时间:2023-05-31
栓接U肋钢箱梁考虑对接偏差的疲劳性能及改进方法研究
Combining Spectral Unmixing and 3D/2D Dense Networks with Early-Exiting Strategy for Hyperspectral Image Classification
敏感性水利工程社会稳定风险演化SD模型
结直肠癌肝转移患者预后影响
Facile Fabrication of Hollow Hydrogel Microfiber via 3D Printing-Assisted Microfluidics and Its Application as a Biomimetic Blood Capillary
3D打印高效成骨、成血管双功能的个性化预制组织工程骨修复大体积颌骨缺损的研究
基于生物3D打印技术制备促血管化骨组织工程支架及其应用
利用3D生物打印技术构建血管化组织工程膀胱补片的研究
预制基于三维打印的个性化、血管化组织工程骨修复下颌骨缺损的实验研究