首页|期刊导航|中华医学杂志（英文版）|Tissue-engineered calcium phosphate cement in rabbit femoral condylar bone defects
中华医学杂志（英文版）Issue(11)：1993-1998,6.DOI:10.3760/cma.j.issn.0366-6999.2012.11.028
Tissue-engineered calcium phosphate cement in rabbit femoral condylar bone defects
Tissue-engineered calcium phosphate cement in rabbit femoral condylar bone defects
摘要
Abstract
Background Calcium phosphate cement (CPC) is a favorable bone-graft substitute,with excellent biocompatibility and osteoconductivity.However,its reduced osteoinductive ability may limit the utility of CPC.To increase its osteoinductive potential,this study aimed to prepare tissue-engineered CPC and evaluate its use in the repair of bone defects.The fate of transplanted seed cells in vivo was observed at the same time.Methods Tissue-engineered CPC was prepared by seeding CPC with encapsulated bone mesenchymal stem cells (BMSCs) expressing recombinant human bone morphogenetic protein-2 (rhBMP-2) and green fluorescent protein (GFP).Tissue-engineered CPC and pure CPC were implanted into rabbit femoral condyle bone defects respectively.Twelve weeks later,radiographs,morphological observations,histomorphometrical evaluations,and in vivo tracing were performed.Results The radiographs revealed better absorption and faster new bone formation for tissue-engineered CPC than pure CPC.Morphological and histomorphometrical evaluations indicated that tissue-engineered CPC separated into numerous small blocks,with active absorption and recorstruction noted,whereas the residual CPC area was larger in the group treated with pure CPC.In the tissue-engineered CPC group,in vivo tracing revealed numerous cells expressing both GFP and rhBMP-2 that were distributed in the medullar cavity and on the surface of bony trabeculae.Conclusion Tissue-engineered CPC can effectively repair bone defects,with allogenic seeded cells able to grow and differentiate in vivo after transplantation.关键词
calcium phosphate cement, bone tissue engineering, bone defect/recombinant human bone morphogenetic protein-2Key words
calcium phosphate cement, bone tissue engineering, bone defect/recombinant human bone morphogenetic protein-2引用本文复制引用
LIU Chun-rong,MIAO Jun,XIA Qun,HUANG Hong-chao,GONG Chen,YANG Qiang,LI Lan-ying..Tissue-engineered calcium phosphate cement in rabbit femoral condylar bone defects[J].中华医学杂志（英文版）,2012,(11):1993-1998,6.基金项目
This research was supported by grants from the National Natural Science Foundation of China (Nos.30500516,31000432,and 30972559). （Nos.30500516,31000432,and 30972559）
