Chinese Journal of Tissue Engineering Research ›› 2018, Vol. 22 ›› Issue (9): 1313-1318.doi: 10.3969/j.issn.2095-4344.0458

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Bone defect repair using allogenic bone carrying bone morphogenetic protein-2 and gene transfected bone marrow mesenchymal stem cells

Wang Xiao-zhi1, Yang Hua1, Zhang Chen2, He Hui-yu1, Ba Jiao-jiao3   

  1. 1Department of Stomatology, People’s Hospital of Changji Hui Autonomous Prefecture, Changji 831100, Xinjiang Uygur Autonomous Region, China; 2Infirmary of the Xinjiang Branch of China Southern Airlines, Urumqi 830002, Xinjiang Uygur Autonomous Region, China; 3Department of Stomatology, General Hospital of Xinjiang Construction Corps, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Revised:2017-10-26 Online:2018-03-28 Published:2018-04-03
  • About author:Wang Xiao-zhi, Department of Stomatology, People’s Hospital of Changji Hui Autonomous Prefecture, Changji 831100, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81060088

Abstract:

BACKGROUND: Bone tissue engineering technology brings a new path to treat bone defects, and moreover, gene transfection optimizes the effects of tissue-engineered bone in bone repair.
OBJECTIVE: To observe the effect of allogenic bone carrying bone morphogenetic protein-2 (BMP-2) and basic fibroblast growth factor (bFGF) transfected bone marrow mesenchymal stem cells (BMSCs) in the repair of critical-sized bone defects of the sheep ilium.
METHODS: Nine Altay sheep were taken to make animal models of critical-sized bone defects in the bilateral ilia. Allogenic bone carrying BMP-2 and bFGF-transfected BMCSCs was implanted into the left side of the ilium (n=9, experimental group), while allogenic bone carrying BMSCs (n=3, cell scaffold group), allogenic bone (n=3, allogenic bone group) and β-tricalcium phosphate (n=3, β-TCP group) were implanted into the right side of the ilium, respectively. Histological observation and immunohistochemical staining were performed at 4, 8, 12 weeks after implantation.
RESULTS AND CONCLUSION: Findings from histological observation showed that: at 12 weeks after implantation, the experimental group exhibited obvious bone remodeling, largely absorbed bone allograft, gradually reduced osteoclast-like cells and increased osteoblast-like cells, clear trabecular structure, dense bone matrix around the trabecular bone, and large area of flaky new bone tissues. Bone materials also degraded in the other three groups, but no remodeling occurred. Immunohistochemical staining showed that at 12 weeks after implantation, bone sialoprotein type I collagen in the experimental group were strongly positive, while they were weakly expressed in the remaining three groups. Overall, our findings indicate that the allogenic bone carrying BMP-2 and bFGF-transfected BMSCs can thoroughly repair critical-sized bone defects of the sheep ilium. 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Bone Morphogenetic Proteins, Basic Fibroblast Growth Factor 2, Stem Cells, Tissue Engineering

CLC Number: