中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (14): 2180-2185.doi: 10.3969/j.issn.2095-4344.2017.14.008

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

音猬因子修饰纳米晶胶原基骨复合骨髓间充质干细胞修复股骨缺损

唐宇星,赵  庆,杨中萌,叶永恒,胡仁安   

  1. 中山大学附属第五医院骨一科,广东省珠海市  519000
  • 收稿日期:2016-12-01 出版日期:2017-05-18 发布日期:2017-06-10
  • 作者简介:唐宇星,男,1970年生,广西壮族自治区桂林市人,汉族,硕士,主治医师,主要从事创伤、关节研究。

Effect of bone marrow mesenchymal stem cells combined with Shh modified nano-hydroxyapatite/collagen for femoral defect repair

Tang Yu-xing, Zhao Qing, Yang Zhong-meng, Ye Yong-heng, Hu Ren-an   

  1. Department of Orthopedics, the Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, Guangdong Province, China
  • Received:2016-12-01 Online:2017-05-18 Published:2017-06-10
  • About author:Tang Yu-xing, Master, Attending physician, Department of Orthopedics, the Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, Guangdong Province, China

摘要:

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文题释义:
音猬因子
:作为一种Hedgehog信号蛋白,具有促使骨组织发育、生长及重构等生理功能。
纳米晶胶原基骨支架:具有优秀的生物融合性及分解性,能有效传导骨组织,并由纳米级晶体组成;其无机物分子和胶原结合构成和天然骨相似,并具有类天然三维孔洞松质骨网,且单孔大小约100 μm,便于有机营养物的传输。


背景:音猬因子作为一种Hedgehog信号蛋白,具有促使骨组织发育、生长及重构等生理功能。
目的:观察音猬因子修饰的纳米晶胶原基骨复合骨髓间质干细胞修复大鼠股骨缺损的效果。
方法:将48只SD大鼠随机分为4组,均建立股骨缺损模型,造模成功后14 d,实验组于骨缺损处植入音猬因子修饰的纳米晶胶原基骨-骨髓间充质干细胞复合物,支架组于骨缺损处植入纳米晶胶原基骨,细胞支架组植入纳米晶胶原基骨-骨髓间充质干细胞复合物,空白对照组不植入任何材料。修复后3,6,9,12周,进行骨缺损区X射线检查、骨密度及骨组织病理切片观察。
结果与结论:①X射线检查:实验组修复后不同时间点的Lane-Sandhu X射线评分、骨密度值均高于其余3组(P < 0.05);②苏木精-伊红染色:修复后12周,支架组有少量骨组织形成,无骨髓形成;细胞支架组有少量骨组织形成,无骨髓形成,可见残留支架;实验组植入物完全吸收,成熟骨组织和髓腔形成,腔内有骨髓形成;③扫描电镜观察:修复后12周,支架组有不规则排列的骨纤维和大量骨陷下窝;细胞支架组可见大量成骨细胞,但骨纤维仍然不规则;实验组有大量排列规则的骨小梁,可见哈佛系统;④结果表明:音猬因子修饰的纳米晶胶原基骨复合骨髓间质干细胞可促进骨缺损的修复。

ORCID: 0000-0001-8363-2908(唐宇星)

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, 纳米晶胶原基骨, 骨缺损模型, 骨髓间充质干细胞, 音猬因子, 股骨

Abstract:

BACKGROUND: SSh as a Hedgehog signal protein can promote bone development, growth and remodeling.
OBJECTIVE: To investigate the effect of bone marrow mesenchymal stem cells (BMSCs) combined with Shh modified nano-hydroxyapatite/collagen (nHAC) in the repair of femoral defects in rats.
METHODS: Forty-eight Sprague-Dawley rats were randomly divided into four groups, and the model of femoral defects was established in these rats. At 14 days after modeling, experimental group was implanted with the BMSCs/Shh modified nHAC, scaffold group was implanted with simple nHAC, cell scaffold group was implanted with BMSCs/nHAC, and blank control group was without any implantation. At 3, 6, 9, 12 weeks after repair, X-ray examination, bone density measurement and bone biopsy in bone defect area were performed.
RESULTS AND CONCLUSION: (1) X-ray examination: The Lane-Sandhu X-ray score and bone mineral density value in the experimental group at different time points after operation were significantly higher than those in the other three groups (P < 0.05). (2) Hematoxylin-eosin staining: 12 weeks after repair, a small amount of bone tissues but no bone marrow formed in the scaffold group; a small amount of bone tissues with absence of bone marrow formed in the cell scaffold group, and the residual scaffold was visible; in the experimental group, the scaffold was completely absorbed, and mature bone and medullary cavity formed with presence of bone marrow. (3) Scanning electron microscope observation: 12 weeks after repair, irregular arrangement of bone fibers and a large number of bone fossae were observed in the scaffold group; the cell scaffold group showed a large number of osteoblasts, but bone fibers still arranged irregularly; in the presence of the Haversian system, a large number of regularly arranged bone trabeculae were detective in the experimental group. These results elucidate that the Shh modified nHAC/BMSCs complex can promote the repair of bone defects.

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: Bone Transplantation, Stem Cells, Femur, Tissue Engineering

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