中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (43): 6403-6408.doi: 10.3969/j.issn.2095-4344.2016.43.003

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials • 上一篇    下一篇

多孔磷酸钙骨水泥与转染骨形态发生蛋白2基因的骨髓间充质干细胞复合修复股骨髁骨缺损

肖琦科1,魏玉珊2,赵轶男3,白  峰4
  

  1. 1宝鸡市中医院骨伤一科,陕西省宝鸡市  721001;2宝鸡市高级职业技术学院,陕西省宝鸡市  721001;3解放军第四军医大学第一附属医院,陕西省西安市  710000;4解放军451医院骨科,陕西省西安市  710000
  • 收稿日期:2016-07-24 出版日期:2016-10-21 发布日期:2016-10-21
  • 通讯作者: 白峰,副主任医师,解放军第451医院骨科,陕西省西安市 710000
  • 作者简介:肖琦科,男,1979年生,陕西省宝鸡市人,汉族,2010年解放军第四军医大学毕业,硕士,主治医师,主要从事创伤、骨缺损的修复、骨组织工程研究。
  • 基金资助:

    国家十一五科技支撑计划(2006BAI16B02)

Construction of tissue-engineered bone by porous calcium phosphate cement with bone marrow mesenchymal stem cells transfected with bone morphogenetic protein 2 gene for repair of femoral condyle defects

Xiao Qi-ke1, Wei Yu-shan2, Zhao Yi-nan3, Bai Feng4
  

  1. 1Department of Orthopedic Surgery, Baoji Traditional Chinese Medical Hospital, Baoji 721001, Shaanxi Province, China; 2Baoji Senior Career Technical College, Baoji 721001, Shaanxi Province, China; 3Xijing Hospital, Fourth Military Medical University of PLA, Xi’an 710000, Shaanxi Province, China; 4Department of Orthopedic Surgery, the 451st Hospital of PLA, Xi’an 710000, Shaanxi Province, China
  • Received:2016-07-24 Online:2016-10-21 Published:2016-10-21
  • Contact: Bai Feng, Associate chief physician, Department of Orthopedic Surgery, the 451st Hospital of PLA, Xi’an 710000, Shaanxi Province, China
  • About author:Xiao Qi-ke, Master, Attending physician, Department of Orthopedic Surgery, Baoji Traditional Chinese Medical Hospital, BaoJi 721001, Shaanxi Province, China
  • Supported by:
    the National Scientific Supporting Program during the Eleventh Five-Year Period, No. 2006BAI16B02

摘要:

文章快速阅读:

 

文题释义:
磷酸钙骨水泥
:与天然骨组织成分相同,具有优良的生物相容性、可降解、易成型的优点,已被作为骨移植替代材料和骨形态发生蛋白的载体材料应用于骨缺损修复。将磷酸钙骨水泥材料制备成多孔结构,不仅可改善其在体内的降解性能,而且有利于细胞、活性因子的复合,利于骨组织的长入。
骨形态发生蛋白2诱导成骨:在骨形成的过程中补充足量的骨形态发生蛋白2,在局部造成高浓度对骨形成是十分有利的。在骨缺损修复过程中,骨形态发生蛋白2可由成骨细胞分泌,或由机体其他区域分泌到达创区,但量很少不能满足修复需要。因此将外源性骨形态发生蛋白2植入骨缺损区域是目前多采用的提高骨缺损的修复效果的手段。但是由于骨形态发生蛋白2 半衰期短,单独在体内使用会很快扩散或被酶解吸收, 在骨形成的过程中难以充分发挥其骨诱导作用。

背景:骨形态发生蛋白能够提高组织工程化骨的成骨能力,但如何控制骨形态发生蛋白在机体局部持续缓慢释放,是构建具有骨诱导能力组织工程化骨的关键问题。
目的:观察转染骨形态发生蛋白2基因的骨髓间充质干细胞,复合多孔磷酸骨水泥构建组织工程化骨对骨缺损的修复作用。
方法:取新西兰兔12只,制作双侧股骨髁缺损模型,左侧植入转染骨形态发生蛋白2基因的骨髓间充质干细胞复合多孔磷酸钙骨水泥组织工程化骨(实验组),右侧植入未转染骨形态发生蛋白2基因的骨髓间充质干细胞复合多孔磷酸钙骨水泥组织工程化骨(对照组)。植入后4,12周取双侧股骨髁,进行组织形态学分析。
结果与结论:①Van-Gieson染色:植入4周时,实验组可见大量新生的编织骨组织形成,主要集中在材料外周孔隙;对照组仅在材料外周观察到少量新生骨组织。植入12周时,实验组外周编织骨转变为成熟的小梁骨,人工骨内部可见大量新生骨组织形成,外周区域部分支架材料吸收被新生骨组织取代;对照组植入区亦可见较多新生骨组织从材料周边区域向中心区域生长,支架材料吸收不明显;实验组不同时间点的新生骨面积均高于对照组(P < 0.001);②免疫荧光染色:植入12周时,实验组新骨形成速率明显快于对照组(P < 0.05);③结果表明:采用基因转染技术将骨形态发生蛋白2转染至骨髓间充质干细胞并与磷酸钙骨水泥材料复合,可显著提高组织工程化骨修复骨缺损的效果。

关键词: 生物材料, 骨生物材料, 骨形态发生蛋白, 骨缺损, 骨髓间充质干细胞, 基因转染

Abstract:

BACKGROUND: Bone morphogenetic protein (BMP) can improve the osteogenesis capacity of tissue-engineered bone. However, how to prolong BMP release is a key for constructing tissue-engineered bone.
OBJECTIVE: To study the repair effect of porous calcium phosphate cement (CPC) with bone marrow mesenchymal stem cells transfected with BMP-2 gene on bone defects.
METHODS: After modeling of bilateral femoral condyle bone defects, 12 model rabbits were given implantation of porous CPC with bone marrow mesenchymal stem cells transfected with BMP-2 on the left (experimental group) and given implantation of porous CPC with bone marrow mesenchymal stem cells on the right (control group). Bilateral femoral condyles were taken and analyzed histologically at 4 and 12 weeks after implantation.
RESULTS AND CONCLUSION: Better osteogenesis including more newly formed bone tissues and faster scaffold absorption was observed in the experimental group compared with the control group at 4 and 12 weeks after implantation. The area of newly formed bone tissues at different time and rate of bone formation at 12 weeks were significantly higher in the experimental group than in the control group (P < 0.001, P < 0.05). These findings indicate that transfer of BMP-2 into bone marrow mesenchymal stem cells combined with porous CPC could increase repair of bone defects.

Key words: Bone Morphogenetic Proteins, Calcium Phosphates, Tissue Engineering

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