中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (38): 6081-6086.doi: 10.3969/j.issn.2095-4344.2015.38.003

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

京尼平交联仿骨结构诱导性骨组织工程支架材料的制备与表征

李 根1,2,李文杰2,唐俊杰2,王九娜2,赵 玲2,秦 文2,赵兴绪1,赵红斌1,2     

  1. 1甘肃农业大学生命科学技术学院,甘肃省兰州市  730070;
    2解放军兰州军区兰州总医院,甘肃省兰州市  730050
  • 出版日期:2015-09-17 发布日期:2015-09-17
  • 通讯作者: 赵红斌,副主任技师,解放军兰州军区兰州总医院骨科研究所,甘肃省兰州市 730050;甘肃农业大学生命科学技术学院,甘肃省兰州市 730070
  • 作者简介:李根,男,山西省朔州市人,汉族,甘肃农业大学生命科学技术学院在读硕士,主要从事组织工程研究。
  • 基金资助:

    甘肃省科技重大专项项目(1203FKDA036)

Preparation and characterization of inducible bone repair composite scaffold with genipin-crosslinked bionic bone structure

Li Gen1, 2, Li Wen-jie2, Tang Jun-jie2, Wang Jiu-na2, Zhao Ling2, Qin Wen2, Zhao Xing-xu1, Zhao Hong-bin1, 2     

  1. 1College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China;
    2General Hospital of Lanzhou Military Command, Lanzhou 730050, Gansu Province, China
  • Online:2015-09-17 Published:2015-09-17
  • Contact: Zhao Hong-bin, Associate chief technician, General Hospital of Lanzhou Military Command, Lanzhou 730050, Gansu Province, China
  • About author:Li Gen, Studying for master’s degree, College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, Gansu Province, China; General Hospital of Lanzhou Military Command, Lanzhou 730050, Gansu Province, China
  • Supported by:

    the Science and Technology Project of Gansu Province, No. 1203FKDA036

摘要:

 背景:目前,尽管利用各种材料制备的组织工程化骨研究取得了一定进展,但均表现出诸如支架材料降解速度与新生骨组织形成速率不匹配、组织生长缓慢、降解代谢产物有毒性等缺陷。

目的:构建一种新型的仿骨结构诱导性骨组织工程支架材料,评价其物理化学及生物学性能。

方法:以壳聚糖包被淫羊藿苷制备微球,检测其体外缓释效果;将载药微球与胶原蛋白复合构建支架材料的管芯;将羟基磷灰石、聚己内酯与胶原蛋白依次以0∶3∶3、1∶3∶3、2∶3∶3、3∶3∶3的比例混合于六氟异丙醇中,通过静电纺丝技术依次电纺制得具有4层结构的支架材料外管;以1%京尼平将经嵌套的管芯与外管交联在一起。利用万能材料试验机、表面接触角仪、红外光谱、扫描电镜、吸水率、透气性、孔隙率、体外降解实验等对交联前后外管材料的结构和特征进行表征,并评价骨髓间充质干细胞与外管材料的生物相容性;Wistar大鼠皮下埋置实验进一步评价交联前后外管材料的组织相容性。

结果与结论:药物在管芯中具有良好的缓释效果;制备的骨组织工程支架材料具有良好的均一性,交联后外管材料的力学性能、吸水率、透气性均高于未交联组(P < 0.05),且体外降解速率显著低于未交联组(P < 0.05)。苏木精-伊红染色显示骨髓间充质干细胞可良好贴附于交联前后的外管材料上;交联的外管材料植入Wistar大鼠皮下后均无炎症反应。表明交联后诱导性骨组织工程支架材料具有良好的生物相容性及力学性能。

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

关键词: 生物材料, 骨生物材料, 仿骨结构, 静电纺丝, 表征, 生物相容性

Abstract:

BACKGROUND: Although there is a certain progress in the preparation of tissue-engineered bone tissue using a variety of materials, some deficiencies have appeared such as mismatching between scaffold degradation rate and new bone formation rate, slow tissue growth, toxic metabolites.

OBJECTIVE: To build a new type of inducible bone repair composite scaffold with bionic bone structurematerials and to evaluate its physicochemical and biological properties.

METHODS: Icariin encapsulated by chitosan was used to prepare drug-loaded microspheres, and the drug release rate of the microspheres was detected. Chitosan microspheres were mixed with collagen to build the core part of scaffold materials. Hydroxyapatite (HA), polycaprolactone (PCL) and collagen were mixed in hexafluoride isopropanol (HFIP) to prepare the HA/PCL/collagen outer part of composite scaffold material at the rate of 0:3:3, 1:3:3, 2:3:3, 3:3:3. Each proportional electrospinning was used for one layer, and finally the 4-layer outer tube of the scaffold was produced. The tube core and outer tube were crosslinked by 1% genipin. Universal material testing machine, surface contact angle meter, infrared spectroscopy, scanning electron microscope, water absorption, permeability, porosity, in vitro degradation tests for cross-linked and uncross-linked were used to 
observe the structure and characteristics of tubular materials. Bone marrow mesenchymal stem cells were seeded on the surface of cross-linked and uncross-linked bone repair materials to evaluate the biocompatibility of the scaffolds. Cross-linked and uncross-linked bone repair materials were implanted subcutaneously into Wistar rats to evaluate the histocompatibility of the scaffolds.

RESULTS AND CONCLUSION: The drug in the scaffold had a suitable release; the bone scaffold material had good uniformity, and cross-linked scaffolds materials had better mechanical properties, water absorption and permeability than the uncross-linked (P < 0.05). The degradation rate of the cross-linked group was significantly lower than that of the uncross-linked group (P < 0.05). Hematoxylin-eosin staining showed that the bone marrow mesenchymal stem cells could adhere well to the cross-linked and uncross-linked materials. No inflammatory reactions occurred after subcutaneous implantation of cross-linked and uncross-linked materials. These findings indicate that the cross-linked scaffold for inducible bone tissue engineering has good biocompatibility and mechanical properties.

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

Key words: Durapatite, Collagen, Cross-Linking Reagents

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