中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (34): 5461-5466.doi: 10.3969/j.issn.2095-4344.2313

• 组织工程骨材料Tissue-engineered bone • 上一篇    下一篇

3D打印淫羊藿苷/脱钙骨基质修复兔股骨髁骨缺损

张虎雄1,李  2,杨物鹏1,新苏雅拉图1   

  1. 1鄂尔多斯市中心医院骨科,内蒙古自治区鄂尔多斯市  0170002鄂尔多斯应用技术学院,内蒙古自治区鄂尔多斯市  017000

  • 收稿日期:2019-12-06 修回日期:2019-12-12 接受日期:2020-01-11 出版日期:2020-11-08 发布日期:2020-09-11
  • 通讯作者: 李微,讲师,鄂尔多斯应用技术学院,内蒙古自治区鄂尔多斯市 017000
  • 作者简介:张虎雄,男,1982年生,内蒙古自治区鄂尔多斯市人,汉族,副主任医师,主要从事骨科创伤和骨科康复研究。

3D-printed icariin/decalcified bone matrix material promotes the repair of femoral condyle defects in rabbits

Zhang Huxiong1, Li Wei2, Yang Wupeng1, New Suyaratu1   

  1. 1Department of Orthopedics, Ordos Central Hospital, Ordos 017000, Inner Mongolia Autonomous Region, China; 2Ordos Institute of Applied Technology, Ordos 017000, Inner Mongolia Autonomous Region, China

  • Received:2019-12-06 Revised:2019-12-12 Accepted:2020-01-11 Online:2020-11-08 Published:2020-09-11

摘要:

文题释义:

脱钙骨基质:主要由93%胶原、5%可溶性蛋白及2%残余矿化基质组成的商业化生物材料,包含不同浓度的骨形态发生蛋白、生长因子及转化生长因子,具备良好的骨传导与骨诱导能力,可以单独或联合其他材料广泛用于骨折、骨不连、骨肿瘤、骨融合、股骨头坏死等治疗中。

结构模型指数:是描述骨小梁组成结构中板层结构和杆状结构比例的参数。如果结构中骨小梁主要为板层结构,那么结构模型指数接近于0;如果结构中骨小梁主要为杆状结构,那么结构模型指数接近于3,该值越小骨小梁越成熟。

背景:淫羊藿苷可促进骨髓间充质干细胞的增殖与成骨分化,具有良好的促成骨性能。脱钙骨基质具备良好的骨传导与骨诱导能力,可以单独或联合其他材料广泛用于骨修复中。

目的:观察3D打印淫羊藿苷/脱钙骨基质材料的缓释性能、细胞相容性与体内成骨性能。

方法:利用3D打印技术制备淫羊藿苷/脱钙骨基质材料与脱钙骨基质材料,检测淫羊藿苷/脱钙骨基质材料的体外缓释性能。将骨髓间充质干细胞分别接种于两种材料表面,以单独培养的细胞为对照,于设定的时间点进行活/死染色、MTT、碱性磷酸酶活性与骨钙素含量检测。取新西兰大白兔30只,建立股骨髁骨缺损模型后分3组处理:对照组不植入任何材料,一组植入脱钙骨基质与同种异体兔骨髓间充质干细胞复合物,另一组植入淫羊藿苷/脱钙骨基质材料与同种异体兔骨髓间充质干细胞复合物,术后412周进行Micro-CT、组织学与力学性能检测。

结果与结论:3D打印淫羊藿苷/脱钙骨基质材料具有缓释性能,在28 d时淫羊藿苷释放量达总量的(54.9±7.9)%;②活/死染色显示,接种1 d后两组材料表面的细胞数量较少,随着培养时间的延长,细胞数量明显增多,至7 d时细胞形态良好,并且淫羊藿苷/脱钙骨基质材料表面的细胞更加均匀、数量更多;③MTT检测显示,淫羊藿苷/脱钙骨基质组培养71014 d的细胞增殖快于其余两组(P < 0.05);④淫羊藿苷/脱钙骨基质组培养71014 d的碱性磷酸酶活性与骨钙素含量均高于其余两组(P < 0.05);⑤术后12Micro-CT显示,植入材料两组均可见大量的骨小梁,其中淫羊藿苷/脱钙骨基质组骨小梁数量更多、骨小梁厚度增加、骨小梁分离度更小;⑥术后12周组织学显示,植入材料两组可见大量骨组织形成,其中淫羊藿苷/脱钙骨基质组新生骨量最多;⑦淫羊藿苷/脱钙骨基质组抗压强度高于其余两组(P < 0.05);⑧结果表明,3D打印淫羊藿苷/脱钙骨基质具有良好的缓释性能、细胞相容性与骨诱导性能。

ORCID: 0000-0002-5272-812X(张虎雄)

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: 骨缺损, 淫羊藿苷">,  , 脱钙骨基质">,  , 骨再生">,  , 骨髓间充质干细胞">,  , 骨钙素">,  , 碱性磷酸酶

Abstract:

BACKGROUND: Icariin can promote the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells, and has good osteogenic properties. Decalcified bone matrix material exhibits good bone conduction and bone induction. It can be used in bone repair alone or in combination with other materials.

OBJECTIVE: To investigate the sustained-release performance, cytocompatibility and osteogenesis of 3D-printed icariin/decalcified bone matrix material.  

METHODS: Icariin/decalcified bone matrix materials and decalcified bone matrix materials were prepared by 3D printing technology. The in vitro sustained-release performance of the icariin/decalcified bone matrix material was detected. Bone marrow mesenchymal stem cells were inoculated on the surfaces of the two materials respectively. The cells cultured separately were used as the control. At the designated time points, the live/dead staining and MTT assay were performed, and alkaline phosphatase activity and osteocalcin content were determined. Thirty New Zealand rabbit models of femoral condyle defect were prepared and then divided into three groups. In the control group, no implant was used. In the simple decalcified bone matrix group, decalcified bone matrix and allogeneic rabbit bone marrow mesenchymal stem cells composite were implanted. In the icariin/decalcified bone matrix group, icariin/decalcified bone matrix and allogeneic rabbit bone marrow mesenchymal stem cells were implanted. At 4 and 12 weeks after surgery, micro-CT and histological and mechanical properties evaluation were performed.

RESULTS AND CONCLUSION: (1) 3D-printed icariin/decalcified bone matrix material exhibited sustained-release performance. At 28 days, the release of icariin was (54.9±7.9)% of total release amount. (2) The live/dead staining revealed that the number of cells on the material surface in simple decalcified bone matrix and icariin/decalcified bone matrix groups were decreased after 1 day of inoculation and significantly increased with the prolongation of culture time. At 7 days, cells grew well, and the cells on the surface of icariin/decalcified bone matrix material were more evenly distributed and increased in number. (3) MTT test showed that cells in the icariin/decalcified bone matrix group proliferated faster after 7, 10, and 14 days of culture than those in the other two groups (P < 0.05). (4) The alkaline phosphatase activity and osteocalcin content in the icariin/decalcified bone matrix group were higher than those in the other two groups after 7, 10, and 14 days of culture (P < 0.05). (5) At 12 weeks after surgery, micro-CT revealed that a large amount of bone trabeculae were observed in both simple decalcified bone matrix and icariin/decalcified bone matrix groups. The number of bone trabeculae was higher, bone trabeculae were thicker, and defect cavity was smaller in the icariin/decalcified bone matrix group than those in the simple decalcified bone matrix group. (6) At 12 weeks after surgery, histological results revealed that a large number of bone tissue was formed in both simple decalcified bone matrix and icariin/decalcified bone matrix groups, but the amount of newly formed bone was higher in the latter group. (7) The compressive strength of bone defects in the icariin/decalcified bone matrix group was higher than that in the other two groups (P < 0.05). (8) These results suggest that 3D-printed icariin/decalcified bone matrix material exhibits good sustained-release performance, cytocompatibility, and osteogenesis. 

Key words:

bone defect">,  , icariin, decalcified bone matrix">,  , bone regeneration">,  , bone marrow mesenchymal stem cells">,  , osteocalcin">,  , alkaline phosphatase

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