中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (25): 3665-3672.doi: 10.3969/j.issn.2095-4344.2016.25.003

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

微环境中间充质干细胞对多孔磷酸钙人工骨的诱导性

毛雪清1,2,厉 孟2,李少峰2,刘兴炎2   

  1. 1解放军第四军医大学西京骨科医院全军骨科研究所,陕西省西安市  7100322解放军兰州军区总医院骨科中心,甘肃省兰州市  730050
  • 收稿日期:2016-04-09 出版日期:2016-06-17 发布日期:2016-06-17
  • 通讯作者: 刘兴炎,教授,主任医师,博士生导师,解放军兰州军区总医院全军骨科中心,甘肃省兰州市 730050
  • 作者简介:毛雪清,男,1985年生,甘肃省庆阳市人,汉族,解放军第四军医大学在读硕士,主要从事创伤骨科,骨组织工程材料研究。
  • 基金资助:

    军队医院临床高新技术重大专项(2010gxjs013);全军十二五医药卫生科研基金面上项目(CLZ13J003);甘肃省自然科学基金面上项目(1208RJZA115);兰州军区十二五医药卫生科研基金面上项目(CLZ12JB12)

Porous calcium phosphate cement induces osteogenesis of mesenchymal stem cells under microenvironment

Mao Xue-qing1, 2, Li Meng2, Li Shao-feng2, Liu Xing-yan2   

  1. 1General Military Orthopedic Institute, Xijing Hospital of the Fourth Military University of Chinese PLA, Xi’an 710032, Shannxi Province, China; 2Department of Orthopedics Center, General Hospital of Lanzhou Military Region of Chinese PLA, Lanzhou 730050, Gansu Province, China
  • Received:2016-04-09 Online:2016-06-17 Published:2016-06-17
  • Contact: Liu Xing-yan, Professor, Chief physician, Doctoral supervisor, Department of Orthopedics Center, General Hospital of Lanzhou Military Region of Chinese PLA, Lanzhou 730050, Gansu Province, China
  • About author:Mao Xue-qing, Studying for master’s degree, General Military Orthopedic Institute, Xijing Hospital of the Fourth Military University of Chinese PLA, Xi’an 710032, Shannxi Province, China; Department of Orthopedics Center, General Hospital of Lanzhou Military Region of Chinese PLA, Lanzhou 730050, Gansu Province, China
  • Supported by:

    the Clinical High-Tech Major Project of Military Hospitals, No. 2010gxjs013; the 12th Five-Year Medical and Health Research Foundation of the PLA, No. CLZ13J003; the Natural Science Foundation of Gansu, No.1208RJZA115; the 12th Five-Year Medical and Health Research Foundation of the Lanzhou Military Region, No. CLZ12JB12

摘要:

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文题释义:
多孔磷酸钙人工骨:
为双相磷酸钙生物材料,最佳相比即羟基磷灰石/β-磷酸三钙比为60/40,羟基磷灰石在体内稳定性较高,β-磷酸三钙在体内吸收较快,因此通过将两者复合共用,利用两者在体内的不同的降解吸收速率,可达到改善材料的诱导活性的目的,多孔磷酸钙人工骨诱导成骨作用受材料孔隙结构影响,理想的孔径为200-400 μm。
骨诱导性:是材料直接诱导间充质细胞分化为骨原细胞、成骨细胞,进而形成骨组织的性能。具有骨诱导性的材料即使在非骨环境中也具有激发骨生成的能力,通常通过异位植入,即非骨环境植入是否能成骨来判断一种材料是否具有骨诱导性。

 

摘要
背景:
生物材料的骨诱导现象已在多种动物实验中被证实。
目的:探讨骨髓间充质干细胞对多孔磷酸钙人工骨的骨诱导作用。
方法:体外分离培养1周龄兔骨髓间充质干细胞,分别以PKH-67或PKH-26荧光标记。将48只成年新西兰大白兔随机分为4组,均在两侧臀大肌内置入多孔磷酸钙人工骨,A组在每侧臀大肌靠近股骨侧臀上动脉分支顺行注入1 mL PKH-26标记的骨髓间充质干细胞,在每侧材料周围注入1 mL PKH-67标记的骨髓间充质干细胞;B组在每侧臀上动脉分支注入1 mL PKH-26标记的骨髓间充质干细胞;C组在每侧材料周围注入1 mL PKH-67标记的骨髓间充质干细胞;D组在每侧材料周围注射同体积生理盐水。置入后3,7,12周取材料及其周围组织,行荧光显微镜观察、骨形态发生蛋白2基因量检测和Masson组织学染色。
结果与结论:①荧光显微镜观察:PKH-26标记的骨髓间充质干细胞趋化速度快,荧光分布均匀;PKH-67标记的骨髓间充质干细胞趋化速度慢,荧光逐步分布均匀;②Masson组织学染色观察:4组出现新生类骨质并逐步增多,A组、B组、C组不同时间点的新生类骨质面积大于D组;③骨形态发生蛋白2基因量检测:A组、B组、C组不同时间点的基因量多于D组(P < 0.05),A组、不同时间点的基因量多于B组、C组(P < 0.05);④结果表明:多孔磷酸钙人工骨可诱导微环境中骨髓间充质干细胞向材料趋化并增殖分化为成骨细胞,进而形成新生骨;周围毛细血管及体液中的间充质干细胞均是成骨源细胞来源,但毛细血管来源间充质干细胞在其中起主要作用。

 

 ORCID: 0000-0001-5262-5166(刘兴炎)

关键词: 生物材料, 骨生物材料, 多孔磷酸钙人工骨, 荧光染色, 骨髓间充质干细胞, 兔, 甘肃省自然科学基金

Abstract:

BACKGROUND: The osteoinduction by biomaterials has been proven in various animal experiments.

 

OBJECTIVE: To investigate the osteoinduction of porous calcium phosphate cement on bone marrow mesenchymal stem cells.

 

METHODS: Bone marrow mesenchymal stem cells were isolated from rabbits aged 1 week in vitro and labeled by PKH-67 or PKH-26, respectively. Forty-eight adult New Zealand white rabbits were randomized into four groups and porous calcium phosphate cement was implanted into both sides of gluteus maximus in each rabbit. Then, 1 mL PKH-26-labeled bone barrow mesenchymal stem cells (1×1010/L) were injected into the superior gluteal artery branch at each side of gluteus maximus near the femur, and 1 mL PKH-67-labeled bone barrow mesenchymal stem cells (1×1010/L) injected into tissues around the cement (group A); 1 mL PKH-26-labeled bone barrow mesenchymal stem cells (1×1010/L) were injected into the each side of superior gluteal artery branch (group B); 1 mL PKH-67-labeled bone barrow mesenchymal stem cells (1×1010/L) were injected into tissues around the cement (group C); the same amount of normal saline was injected into tissues around the cement (group D). At 3, 7 and 12 weeks after implantation, the cement and its surrounding tissues were extracted and detected by fluorescence microscope and Massion staining. Expression of bone morphogenetic protein 2 was analyzed by RT-PCR.

 

RESULTS AND CONCLUSION: Under fluorescence microscope, PKH-26-labeled bone barrow mesenchymal stem cells attached fast and distributed homogeneously; however, PKH-67-labeled bone barrow mesenchymal stem cells attached slowly and exhibited a gradually homogeneous distribution. Massion staining showed that ectopic new bone formation appeared to have an upward trend in all groups, and the area of new bones in groups A, B and C were larger than that of group D at different time points after implantation. There was a significantly higher expression of bone morphogenetic protein 2 in groups A, B and C compared with the group D at different time points after implantation (P < 0.05), and the expression was the highest in the group A (P < 0.05). In conclusion, the porous calcium phosphate cement can induce bone barrow mesenchymal stem cells chemotaxis and osteogenetic differentiation. Besides, osteoblasts are differentiated from both the surrounding capillaries and body fluid, and capillary-derived mesenchymal stem cells occupy the important position. 

 

 

 

Key words: Calcium Phosphates, Stem Cells, Tissue Engineering

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