中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (16): 2883-2890.doi: 10.3969/j.issn.2095-4344.2013.16.005

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

骨髓基质干细胞复合煅烧骨的皮下成骨

杨川博,何惠宇,崔  杰,马文渊,杨  楠   

  1. 新疆医科大学第一附属医院口腔修复科,新疆维吾尔自治区乌鲁木齐市 830054
  • 出版日期:2013-04-16 发布日期:2013-04-16
  • 通讯作者: 何惠宇,教授,主任医师,硕士生导师,新疆医科大学第一附属医院口腔修复科,新疆维吾尔自治区乌鲁木齐市 830054 hehuiyu02@sina.com
  • 作者简介:杨川博★,男,1986年生,汉族,新疆维吾尔自治区博乐市人,新疆医科大学在读硕士,现就职于新疆医科大学第一附属医院口腔修复科。 yangchuanbo111@163.com
  • 基金资助:

    国家自然科学基金项目(81060088),课题名称:三维打印构建组织工程化牙槽骨的实验研究;自治区自然科学基金项目(2011211A073),课题名称:荧光蛋白标记的组织工程骨修复颌骨缺损及其成骨能力的观测研究。新疆维吾尔自治区高校科研计划重点项目(XJEDU2009I22),课题名称:bFGF转染的骨髓间充质干细胞复合异种煅烧骨修复颌骨缺损的实验研究。

Subcutaneous osteogenesis by bone marrow stromal cells combined with sintered bone

Yang Chuan-bo, He Hui-yu, Cui Jie, Ma Wen-yuan, Yang Nan   

  1. Department of Prosthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi  830054, Xinjiang Uygur Autonomous Region, China
  • Online:2013-04-16 Published:2013-04-16
  • Contact: He Hui-yu, Professor, Chief physician, Master’s supervisor, Department of Prosthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China hehuiyu02@sina.com
  • About author:Yang Chuan-bo★, Studying for master’s degree, Department of Prosthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China yangchuanbo111@163.com.
  • Supported by:

     the National Natural Science Foundation of China, No. 81060088*; the Natural Science Foundation of Xinjiang Uygur Autonomous Region, No. 2011211A073*; the Major Scientific Research Plan of University in Xinjiang Uygur Autonomous Region, No, XJEDU2009I22*

摘要:

背景:研究证明骨髓基质干细胞与煅烧骨支架材料结合后可形成组织工程化骨,但在动物体内的生物相容性及皮下诱导成骨的能力国内报道较少。
目的:观察骨髓基质细胞复合异种煅烧骨植入BALB/c裸鼠背部皮下的成骨性能及煅烧骨材料作为组织工程骨支架材料的可行性。
方法:选用经脱脂及脱蛋白处理后高温煅烧形成的骨支架材料与梯度密度离心法分离培养至第3代的羊骨髓基质干细胞构建细胞-煅烧骨复合物植入BALB/c裸鼠背部皮下,选同期对侧背部皮下植入单纯煅烧骨为对照组。
结果与结论:煅烧后的松质骨块为白垩色,表面呈蜂窝状多孔结构,保留了天然松质骨的多孔状空间结构。骨小梁结构完整,孔隙相互连通。骨髓基质干细胞接种到煅烧骨后24 h可见大量细胞黏附于支架上,7 d后细胞分泌大量细胞外基质,细胞与基质分界不清,细胞能在材料上良好地黏附、增殖与生长,细胞活性未受到支架材料的影响。植入4周后,两组均可见煅烧骨边缘出现少量残片,细胞-煅烧骨复合物组煅烧骨孔隙周边可发现骨细胞,对照组煅烧骨表面可见纤维结缔组织包绕。植入后8周,两组均可见到煅烧骨部分降解为片状类骨质,周围有成纤维细胞包绕,排列紧密,形态多样,细胞-煅烧骨复合物组煅烧骨孔隙内可见煅烧骨表面有排列成行的成骨细胞,孔隙间有散在淋巴细胞浸润。对照组标本可见孔隙内有大量结缔组织长入,未见明显成骨迹象。结果说明,经高温煅烧后的松质骨材料,具有良好的生物相容性和生物安全性,可作为骨髓基质干细胞的良好载体,复合后植入体内能够诱导新生骨组织形成,可作为骨缺损组织工程修复的支架材料。

关键词: 生物材料, 组织工程骨材料, 煅烧骨, 骨髓基质干细胞, 骨缺损, 皮下成骨, 植入, Balb/c裸鼠, 骨髓来源干细胞, 骨组织工程, 国家自然科学基金

Abstract:

BACKGROUND: It has proved that the bone marrow stromal cells and sintered bone support material combination can form tissue-engineered bone, but relevant studies on its biocompatibility in animals and subcutaneous osteogenesis ability are less reported in China.
OBJECTIVE: To observe the osteogenesis capacity of marrow stromal stem cells combined with sintered bone implanted into Balb/c nude mouse back subcutaneously and to explore the feasibility of sintered bone as a scaffold for tissue-engineered bone.
METHODS: Sintered bone scaffold materials were prepared using defatted and deproteinized processing and high-temperature calcinations. Then the sintered bone was combined with passage 3 sheep bone marrow stromal stem cells cultured using density gradient centrifugation method to be implanted subcutaneously into the back of BALB/c nude mice. Simple sintered bone that was subcutaneously implanted into the contralateral back of BALB/c nude mice served as control group.
RESULTS AND CONCLUSION: After calcinations, sintered cancellous bone block colored chalks and the surface displayed a honeycomb porous structure, maintaining the porous structure of the natural cancellous bone. Bone trabecular structure was of integrity, and pores were mutually interconnected. After bone marrow stromal stem cells were inoculated to the calcined bone, there were a lot of cells adherent to the scaffold within 24 hours, and a large amount of extracellular matrix at 7 days. The boundary between cells and extracellular matrix was unclear, and the cells could grow and proliferate well on the scaffold, suggesting that the cell viability was not influenced by the scaffold. Four weeks after implantation, a few of fragments were visible at the edge of sintered bone in the two groups. Bone cells could be seen around the pores of sintered bone in the combination group, while fibrous connective tissue enveloped the sintered bone in the control group. Eight weeks later, the sintered bone partially degraded into osteoid sheets surrounded by fibroblasts that arranged closely and was diverse in shape. In the combination group, osteoblasts arranged in line on the surface of sintered bone and infiltrated lymphocytes were scattered among the pores. In the control group, a great amount of connective tissues grew into the pores, but there was no osteogenesis. These findings indicate that the sintered cancellous bone block pose better biocompatibility and biological safety, which can be a better scaffold for bone marrow stromal stem cells. The composite of bone marrow stromal stem cells and sintered bone has a good ability to induce new bone formation and the sintered bone can be used as scaffold materials for tissue engineering repair of bone defects.

Key words: biomaterials, tissue-engineered bone materials, sintered bone, bone marrow stromal stem cells, bone defects, subcutaneous osteogenesis, implantation, Balb/c nude mice, bone marrow-derived stem cells, bone tissue engineering, National Natural Science Foundation of China

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