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Large-sized bone defect repair by combining a decalcified bone matrix framework and bone regeneration units based on photo-crosslinkable osteogenic microgels

引用

Bioactive Materials 2022年第8期7卷 97-109页

作者： Junxiang Hao Baoshuai Bai Zheng Ci Jincheng Tang Guanhuai Hu Chengxiang Dai Mengyuan Yu Meng Li Wei Zhang Yixin Zhang Wenjie Ren Yujie Hua Guangdong Zhou Research Institute of Plastic Surgery Weifang Medical UniversityWeifangShandongChina Department of Plastic and Reconstructive Surgery Shanghai 9th People’s HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of Tissue EngineeringShanghaiChina National Tissue Engineering Center of China ShanghaiChina Institute of Regenerative Medicine and Orthopedics Institutes of Health Central PlainXinxiang Medical UniversityXinxiangHenanChina Cellular Biomedicine Group Inc.ShanghaiChina

Physiological repair of large-sized bone defects is great challenging in clinic due to a lack of ideal grafts suitable for bone *** bone matrix(DBM)is considered as an ideal bone regeneration scaffold,but low cell seeding efficiency and a poor osteoinductive microenvironment greatly restrict its application in large-sized bone *** address these problems,we proposed a novel strategy of bone regeneration units(BRUs)based on microgels produced by photo-crosslinkable and microfluidic techniques,containing both the osteogenic ingredient DBM and vascular endothelial growth factor(VEGF)for accurate biomimic of an osteoinductive *** physicochemical properties of microgels could be precisely controlled and the microgels effectively promoted adhesion,proliferation,and osteogenic differentiation of bone marrow mesenchymal stem cells(BMSCs)in *** were successfully constructed by seeding BMSCs onto microgels,which achieved reliable bone regeneration in ***,by integrating the advantages of BRUs in bone regeneration and the advantages of DBM scaffolds in 3D morphology and mechanical strength,a BRU-loaded DBM framework successfully regenerated bone tissue with the desired 3D morphology and effectively repaired a large-sized bone defect of rabbit *** current study developed an ideal bone biomimetic microcarrier and provided a novel strategy for bone regeneration and large-sized bone defect repair.

关键词： Microgels Large-sized bone defect repair bone regeneration units Photo-crosslinking Decalcified bone matrix

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